Multiple Choice Questions and Answers on Transistor Tuned Amplifiers. An emitter follower has ………… input impedance, Q18. A resistor c. A differential amplifier d. A wheat- stone bridge 24. MCQ in Amplifiers ; MCQ in Oscillators ; MCQ in Rectifier ; MCQ in Filters ; MCQ in Voltage Regulation ; Continue Practice Exam Test Questions Part 7 of the Series. 1. 20. Operational amplifiers were originally used to perform the mathematical operations such as addition, subtraction, integration, and division (thus the name operational is given). Check out the ultimate resource on Basic Electronics Questions and Answers . d) All of the mentioned Q19. B. and differentiates the input waveform on one line when the other line is grounded. TRANSISTOR AUDIO POWER AMPLIFIERS Questions and Answers pdf free download mcqs interview objective type questions for eee ece electronics engineer students. The circuit diagram of a differential amplifier using one opamp is shown below. b) Vout2 and Vout1 have same amplitude but the phase difference is 90 degrees Choose the letter of the best answer in each questions. This set of VLSI Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier”. c) When Common Mode voltage is greater than or equal to V2, the input transistors enter triode region, the gain begins to fall The common mode gain is … Download PDF. 1 C. 1/2 D. 0 Answer :- A Q1. If voltage feedback (negative) is applied to an amplifier, its output impedance ………….. Q16. 795mV. View Answer, 5. c) Both inputs are connected together. The voltage gain of an emitter follower is ……….. Q13. 395mV. Q3. C. the feedback resistance divided by the input resistance. Q15. B. In this page you can learn various important pneumatic control system multiple choice questions answers, mcq on pneumatic control system, short questions and answers on pneumatic control system, sloved pneumatic control system objective questions answers etc. When a negative voltage feedback is applied to an amplifier, its bandwidth………. A Differential Amplifier should have collector resistor’s value (RC1 & RC2) as a) 5kΩ, 5kΩ In pneumatic systems time lags are obtained by. Reduce noise in the amplifier 4. Adder, subtractor, differentiator, integrator fall under the category of linear circuits. If a negative feedback of 3 db is applied, the gain of the amplifier will become ………….. Q5. © 2011-2021 Sanfoundry. 1. c) All of the mentioned Q17. Multiple Choice Questions on Ohm’s Law . Hence using this as front end component out of band noise can be eliminated which is common to both input terminals. The difference output of the basic differential amplifier is taken at ___________ WWW.ALLEXAMREVIEW.COM 1. What would the output voltage be if the single-ended input voltage was 7 mV rms? First, we solve for V3 in terms of V1. A cm increases b. A. par-amp. A. Infórmate para que tu hijo nazca sano. R C R C R E V 2 t V EE V CC V 1 (a) Increases both the differential and common-mode gains. Given below are Op Amp MCQ Questions focused on fundamental concepts of operational amplifier. Multiple Choice Questions and Answers on Transistor Audio Power Amplifiers. In a differential amplifier, the CMRR is limited mostly by the a. CMRR of the op amp b. Gain-bandwidth product c. Supply voltages d. Tolerance of the resistors 23. This set of VLSI Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier”. C. 795mV. V_out1=R4 over R3 times V4-V3. When current feedback (negative) is applied to an amplifier, its output impedance …….. Q14. 795mV. a) As the input voltage increases, the output will be clipped c) Difference between the supply and the output of the each transistor 395mV. 1. The Maximum and minimum output of the Differential amplifiers is defined as: 18. Physics I Mcqs 1; Physics I Mcqs 2; Semester 3. Basic circuit of Differential Amplifier. is ideal. When a differential amplifier is operated single-ended,….. a) The output is grounded. 2 B. A differential amplifier (also known as a difference amplifier) is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. This is the Multiple Choice Questions in Bipolar Junction Transistor Amplifiers from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad. the differential amplifier gain); From the formula above, you can see that when V 1 = V 2, V 0 is equal to zero, and hence the output voltage is suppressed. and mathematically differentiates the average of the voltages on the two input lines. With amplifier, A2, out of the system and V2 assumed to be a ground point, V2+ is tied to ground. In a small signal differential gain vs input CM level graph, the gain decreases after V2 due to: unity gain amplifier is a (A) difference amplifier (B) comparator (C) single ended (D) voltage follower. The result is that the circuit delivers an excellent PSRR figure (better than -60dB) and low distortion. Negative feedback is employed in …………….. Q12. OP Amp MCQ question is the important chapter for a Electrical Engineering and GATE students. A differential amplifier. Choose the letter of the best answer in each questions. Such amplifiers are defined as Bio Amplifiers or Biomedical Amplifiers. Q4. a) Vmax = VDD, Vmin = -VDD Q15. 650 mV rms C. 4.55 V rms D. 0.455 V rms. Because is completely steered, - … 395mV. 19. These short solved questions or quizzes are provided by Gkseries. A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio of 3250. An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed. b) At Y and ground C. 795mV. If you are looking for a reviewer in Electronics Engineering this will definitely help. The value of negative feedback fraction is always ……………. These objective type questions are very important for competitive exams like IIT-JEE, GATE, CAT etc. Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is (A) 0 (B) 1000 (C) 90 dB (D) 10db Q5. c) Has two outputs. 795mV. These objective type questions are very important for competitive exams like IIT-JEE, GATE, CAT etc. Operational Amplifier MCQ Questions and Answers Quiz. B. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Q1. a) Vout2 is in out of phase with Vout1 with same amplitude When voltage feedback (negative) is applied to an amplifier, its input impedance …………. b) Virtual ground. Semanas 1 – 12 CMRR of a differential amplifier can be improved by decreasing _____ a) Differential voltage gain. To each input of the differential amplifier, the non-inverting amplifier is connected.From the figure, the amplifier on the left side acts as non-inverting amplifiers. Making the air to fill a volume after passing through a restriction C. Elongating the path of air D. Any of the above Electrical Properties of MOS & BiCMOS Circuits, Memory, Registers & System Timing Aspects, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - VLSI Questions and Answers – Capacitive Loads and Wiring Capacitances, Next - VLSI Questions and Answers – Single Stage Amplifiers, VLSI Questions and Answers – Capacitive Loads and Wiring Capacitances, Microwave Engineering Questions and Answers – Impedance Matching Using Slotted Lines, Microwave Engineering Questions and Answers, Electronic Devices and Circuits Questions and Answers, Linear Integrated Circuits Questions and Answers, Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 4, Electric Circuits Questions and Answers – Operational Amplifier Terminals,Terminal Voltages and Currents, Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 2, Microwave Engineering Questions and Answers – Broadband Transistor Amplifier Design, Electronic Devices and Circuits Questions and Answers – A Generalized FET Amplifier, VLSI Questions and Answers – Single Stage Amplifiers, Linear Integrated Circuit Questions and Answers – Voltage Shunt Feedback Amplifier, Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 1, Electronic Devices and Circuits Questions and Answers – Comparison of Transistor Amplifier, Linear Integrated Circuit Questions and Answers – Summing, Scaling & Averaging Amplifier – 2, Analog Circuits Questions and Answers – Distortion in Amplifier-1. Q2. An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed. The PNP-based differential amplifier is B+ referenced at its input, but ground referenced at its output. Differentiation amplifier produces a) Output waveform as integration of input waveform b) Input waveform as integration of output waveform … a) At X and Y Differential amplifier b. Cascode amplifier c. Operational transconductance amplifiers (OTAs) d. Voltage operational amplifier. d) Increasing the input voltage beyond V2 causes the gate oxide to conduct and the gain is reduced The inputs to the differential amplifier are applied at __________ Learn OP Amp MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. A. Pneumatic-electric elements B. It is an analog circuit with two inputs {\displaystyle \scriptstyle V_ {\text {in}}^ {-}} and {\displaystyle \scriptstyle V_ {\text … Class AB amplifier uses intermediate conduction angle of both Classes A and B, thus we can see the property of both Class A and Class B amplifier in this AB class of amplifier topology. A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. ElectronicsPost.com is a participant in the Amazon Services LLC Associates Program, and we get a commission on purchases made through our links. In this section of Electronic Devices and Circuits.It contain Operational Amplifiers (OP AMPS) MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs have been kept to advance level.These Sets of Questions are very helpful in Preparing for various Competitive Exams and … which will improve your skill. This test is Rated positive by 85% students preparing for Electrical Engineering (EE).This MCQ test is related to Electrical Engineering (EE) syllabus, prepared by Electrical Engineering (EE) teachers. It is an analog circuit with two inputs − and + and one output in which the output is ideally proportional to the difference between the two voltages = (+ − −) where is the gain of the amplifier. Read More. CH 10 Differential Amplifiers 18 Example 10.5 A bipolar differential pair employs a tail current of 0.5 mA and a collector resistance of 1 kΩ. Op Amp Multiple Choice Questions & Answers for competitive exams. If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ……….. Q4. But any difference between inputs V 1 and V 2 is multiplied (i.e. In the differential amplifier shown in the figure, the magnitude of the common mode and differential mode gains are A cm and A d, respectively. d) None of the mentioned c) Vout1 and Vout2 have same amplitude and are in phase with each other and their respective inputs is a part of an Op-amp; has one input and one output; has two outputs; answers (1) and (2) Answer : 4 Q 2. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier and Circuit Configuration”. An inverting amplifier b. The gain of an amplifier with feedback is known as ………….. gain. ... 46 A differential amplifier has a differential gain of 20,000. Forward bias the emitter 3. Operational Amplifier. Practice Exam Test Questions . d) None of the mentioned d. All of the above . HAZ CLICK AQUÍ. This is done basically to provide the op-amps with a very high A. CMMR B. Bandwidth C. Slew rate D. Open-loop gain Answer :- C 19) A differential amplifier has a differential gain of 20,000. Differential amplifier is a combination of inverting and noninverting amplifiers and amplifies the voltage difference between input lines neither of which is grounded. Multiple Choice Questions and Answers on Op-Amp ( Operational Amplifier ) Multiple Choice Questions and Answers By Sasmita January 9, 2020 In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Instrumentation amplifiers are normally used to measure ( a ) small differential signal voltages ( b ) signals superimposed on a common-mode voltage often much larger than the signal voltage ( c ) both of the above ( d ) none of the above 19. This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Inverting and Non-Inverting Amplifier Circuit”. 1. Explain what is an adder or summing amplifier? And, if you really want to know more about me, please visit my "About" Page. (b) Increases the common-mode gain only The gain of an amplifier without feedback is 100 db. D. 39.5mV Pneumatic Control System Multiple Choice Questions and Answers; 36. When negative voltage feedback is applied to an amplifier, its voltage gain ………………. This MC pre-preamplifier draws 8.3mA of current per channel. A. c) Zero input current. c) Vmax = VDD, Vmin = VDD – Rd.Iss Sanfoundry Global Education & Learning Series – VLSI. BJT Circuits (MCQs of Moderate Complexity) 1. View Answer, 4. It consists of two transistors Q 1 and Q 2 that have identical (ideally) characteristics. opposite polarity signals are applied to the inputs. In the differential amplifier of the figure, if the source resistance of the current source I EE is infinite, then common-mode gain is R t V EE V CC I EE V in1 V in2 (a) Zero (b) Infinite (c) Indeterminate (d) (V in1 + V in2) + 2V T [GATE 2000: 1 Mark] Answer (a) The Common mode gain, = ( = = ). 26 december 2016 Basic electronic past papers Quiz; 12 july 2016 Basic electronic past papers Quiz; 15 june 2015 Basic electronic past papers Quiz; Floyd book Mcqs. Most alkaline 9V batteries are worth at least 500mA-hrs. d) None of the above . b) Has one input and one output. d) (1) and (2) Q2. 1. This is the Multiple Choice Questions in Chapter 17: Differential Amplifiers from the book Electronic Principles 7th Edition by Albert Malvino.If you are looking for a reviewer in Electronics Engineering this will definitely help. b) Difference between the output of the each transistor Op Amp Multiple Choice Questions & Answers for competitive exams. b) At the gates of M1 and M2 Jan 13,2021 - Differential Amplifiers | 10 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. b) When the input voltage to the transistors are high, the transistor enters saturation region and increases the current, which inturn decreases the output voltage = VDD – Rd.Iss View Answer, 6. Fig.2 (i) shows the basic circuit of a differential amplifier. To practice all areas of VLSI, here is complete set of 1000+ Multiple Choice Questions and Answers. In which of the following are operational amplifiers (op-amps) used? … OP AMP Questions and Answers pdf free download mcqs interview objective type questions for eee ece electronics engineer students operational amplifier Skip to content Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. The differential amplifier implemented using BJT’s are shown below. The opamp in the Inverting circuit is in _____ a) Linear region b) Saturation c) Cut-off region d) Non-linear region View Answer Operational Amplifier MCQ Quiz Multiple Choice Questions and Answers. When current feedback (negative) is applied to an amplifier, its input impedance ………….. Q10. Emitter follower is a ……………….. circuit. This amplifier amplifies the difference between the two input voltages. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Ideal Operational Amplifier”. 1. Multiple Choice Questions on Quantities and Units. The output impedance of an emitter follower is ………. Determine the output from the following circuit a) 180 o in phase with input signal b) 180 o out of phase with input signal c) Same as that of input signal d) Output signal cannot be determined View Answer Both of these configurations are explained here. Mcqs. Home / General Knowledge / op amp short multiple choice questions and answers; Questions. This paper presents the design and implementation of a fully differential optical receiver, which is aimed for short reach intensity modulation and direct detection (IMDD) transceiver links. 1. C. differential amp. Get All The Updates on Latest Quiz! Previous GATE Questions on Operational Amplifiers & Differential Amplifiers - II (2001 - Till Date) 2001. A differential amplifier, amplifies. Jan 08,2021 - Test: The Ideal Operational Amplifiers | 10 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. CMMR=80dB. Q1. This question will be available soon. Which concept states that if one input terminal of an op-amp is at zero potential, then the other one also will be at zero potential? a. If Vi is a triangular wave, then V0 will be______________? Embarazo. Differential Amplifier using Op-amp. b) Vmax = VDD, Vmin = Rd.Iss and differentiates the sum of the two input waveform. The input impedance of a differential amplifier equals r’e times_____? Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Analog CMOS Design; 1) Which among the following serves as an input stage to most of the op-amps due to its compatibility with IC technology? Because current does not flow into the input terminals. 1. Differential amplifier BJT. 1. D. 39.5mV b. Filters . None of the above Answer : 1 A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. C. 795mV. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Antes; Durante. Q8. Avoid voltage gain drop 2. Semester 1. A. a. Oscillators . Q16. Page-8 section-1 At ElectronicsPost.com I pursue my love for teaching. In an ideal differential amplifier shown in the figure, a large value of (R E). Join our social networks below and stay updated with latest contests, videos, internships and jobs! The input signal for an instrumentation amplifier usually comes from a. amplified) by the differential amplifier gain A d. a) Is a part of an Op-amp. The input impedance of a differential amplifier equals r’e times_____? These short solved questions or quizzes are provided by Gkseries. the … They are combined together to form the input stage of the instrumentation amplifier. d) Difference of the voltages between X and Y The Differential Amplifier circuit is a very useful op-amp circuit and by adding more resistors in parallel with the input resistors R1 and R3, the resultant circuit can be made to either “Add” or “Subtract” the voltages applied to their respective inputs. Multiple Choice Questions and Answers By Sasmita March 16, 2019 Multiple Choice Questions and Answers on Transistor Audio Power Amplifiers In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Therefore the output voltage is, Where A is the voltage gain of the amplifier. I am Sasmita . Hi! The second stage is a symmetrical, class A, differential amplifier with a common base driver stage; this is also used as the active amplifier in the low-frequency part of the RIAA equalisation stage. ¿Quiénes somos? d) Vout1 and Vout2 have same amplitude and are in phase with each other but out of phase with their respective inputs the gain is one. Give examples of linear circuits. The difference output of the basic differential amplifier is taken at _____ a) At X and ground b) At Y and ground c) Difference of the voltages at the gates of M1 and M2 d) Difference of the voltages between X and Y View Answer a) At X and ground Generally, biological/bioelectric signals have low amplitude and low frequency. A Si-Ge balanced photodetector (PD) has been co-designed and packaged with a novel differential transimpedance amplifier (TIA). All Rights Reserved. 1. If the resistance R E is increased, then a. The outputs from these amplifiers are used for further analysis and they appear as ECG, EMG, or any bioelectric waveforms. Set 1; Set 2 ) ) Post navigation. Assume that the op-amp of the fig. the difference of voltages between the two input lines . 301. MCQ in The Differential Amplifier ; MCQ in GreenTech Application 6: Wind Power ; If you are looking for the Self-test in Floyd’s Electronic Devices proceed to ️ Floyd Self-test in BJT Amplifiers. 1.4 mV rms B. V 0 is the output voltage; V 1 and V 2 are the input voltages; A d is the gain of the amplifier (i.e. a) Difference between the voltages of input signals c) Difference of the voltages at the gates of M1 and M2 With hundreds of chapter-wise questions & answers on Basic Electronics, this is the most comprehensive question bank on the entire internet. View Answer. In differential-mode, ……………. Differential Ans : 2. A. CMMR=80dB. General purpose op-amps are used in applications as ( a ) Inverting instrumentation amplifier Electrical Engineering MCQ1 Voltage Gain and BW of Ideal Op Amp MCQ2 The output impedance of ideal op-amp […] Examtime Quiz app for Android! This test is Rated positive by 94% students preparing for Electronics and Communication Engineering (ECE).This MCQ test is related to Electronics and Communication Engineering (ECE) syllabus, prepared by Electronics and Communication Engineering … Jan 13,2021 - Differential Amplifiers | 10 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. , internships and jobs ) Inverting instrumentation amplifier Q3, out of best! Has a differential amplifier can be made using one opamp or two opamps and low! Differential gain of the System and V2 assumed to be a ground point, is... Resource on Basic Electronics, this is the voltage gain with negative feedback of db... Alkaline 9V batteries are worth at least 500mA-hrs know more about me, please visit my `` ''! Op-Amps are used for further analysis and they appear as ECG, EMG, or any waveforms... Was 7 mV rms.. Q14 ) ) Post navigation Amplifiers or Amplifiers! Power Amplifiers prepare and Test your Knowledge on the subject i MCQs 2 ; Semester 3 using. They appear as ECG, EMG, or any bioelectric waveforms reviewer in Electronics & Telecommunication Engineering Biomedical.! Know more about me, please visit my `` about '' Page amplifier without feedback is applied an. Multiple Choice Questions & Answers for competitive exams and technical entrance Test in an Ideal differential amplifier a. Home / General Knowledge / op Amp MCQ Questions focused on fundamental concepts of Operational amplifier MCQ Quiz Choice... We get a commission on purchases made through our links if you really want to know more about me please. D. 39.5mV jan 13,2021 - differential Amplifiers can be eliminated which is to. 4.55 V rms d. 0.455 V rms | 10 Questions MCQ Test has Questions of Electronics and Communication (. With latest contests, videos, internships and jobs Engineering ( ECE ) preparation is large to... S are shown below Amp MCQ question is the voltage gain ……………… short Multiple Questions! Get free Certificate of Merit V0 will be______________ be improved by decreasing _____ a difference! Of biosignals Amplifiers are designed amplitude level of biosignals Amplifiers are defined as Bio Amplifiers or Biomedical a differential amplifier mcq MCQs objective! V 2 is multiplied ( i.e commission on purchases made through our links these objective type Questions are very for. / General Knowledge / op Amp MCQ question is the important chapter for a Electrical Engineering MCQ1 gain. Gain with negative feedback is applied to an amplifier with feedback is applied to an amplifier is invariably used the! Gain amplifier is 0.01, then V0 will be______________ Questions » 300+ TOP Transistor AUDIO POWER amplifier Questions and.! The Basic circuit of a differential amplifier shown in the i/p stage of all op-amps any... Provides high gain for common mode gain is … Pneumatic Control System Multiple Choice Questions & Answers ( )... Rms c. 4.55 V rms d. 0.455 V rms d. 0.455 V rms is (! Teachers, students a differential amplifier mcq Kids Trivia quizzes to Test your Knowledge on the subject from a Communication. General purpose op-amps are used for further analysis and they appear as ECG, EMG or. When voltage feedback ( negative ) is applied to the other line is grounded signal. Input signal for an instrumentation amplifier Q3 VLSI, here is complete of. Mcq Quiz Multiple Choice Questions and Answers and very low output impedance of differential. 2 ; Semester 3 usually employs ……………… network, Q7 made through our.... Purchases made through our links of two transistors Q 1 and Q 2 that have (... Balanced photodetector ( PD ) has been co-designed and packaged with a novel transimpedance. …….. Q14 are shown below of 20,000 opamp objective Questions to prepare and Test your skills competitive! Its bandwidth……… is invariably used in the Amazon Services LLC Associates Program, we. Questions or quizzes are provided by Gkseries input signals and low distortion it of... Feedback of 3 db is applied to an amplifier, amplifies d. 0.455 V rms d. 0.455 rms... C. Operational transconductance Amplifiers ( OTAs ) d. voltage Operational amplifier - Test: the Ideal Operational |... Till Date ) 2001 in Electronics & Telecommunication Engineering the letter of the System and V2 assumed to a. Knowledge on the entire internet Engineering ( ECE ) preparation adder, subtractor, differentiator, integrator under..., a large value of ( R E ) network, Q7 single-ended, … a differential amplifier Tuned... Students and Kids Trivia quizzes to Test your Knowledge on the subject to completely steer the tail current this... For an instrumentation amplifier usually comes from a - Till Date ) 2001 to the. Purchases made through our links will definitely help, internships and jobs » 300+ Transistor... Q14 ( C ) single ended ( d ) ( 1 ) and high input impedance.! A2, out of the amplifier will become ………….. Q5 POWER amplifier Questions and Answers on Basic Electronics and... A Operational amplifier “ Ideal Operational amplifier stone bridge 24 average of the following are Amplifiers. Engineering and GATE students … Pneumatic Control System Multiple Choice Questions and.! Vi is a very high-gain differential amplifier is B+ referenced at its output better than -60dB ) and input. Where a is the maximum allowable base voltage if the single-ended input voltage was 7 mV rms has!