Related InterviewSolutions

• For any cascaded amplifier network, which of these are incorrect?(a) Cascading increases gain(b) Overall input resistance is equal to the input resistance of the first amplifier(c) The overall output resistance is less than the lowest output resistance in all amplifiers used(d) Loading effect occursI have been asked this question in an online quiz.The above asked question is from Cascaded Amplifier in chapter General and Feedback Amplifiers of Analog Circuits
• Cascading increases lower cut-off frequencies.(a) True(b) FalseI had been asked this question during an interview.My doubt stems from Cascaded Amplifier topic in portion General and Feedback Amplifiers of Analog Circuits
• 6 similar amplifiers are cascaded, with lower cut-off frequency 100Hz. Bandwidth is B1=10 kHz. What is the higher cut-off frequency of the cascaded network?(a) 4000 Hz(b) 1667 Hz(c) 3642 Hz(d) 3000 HzThe question was posed to me by my college director while I was bunking the class.The question is from Cascaded Amplifier in section General and Feedback Amplifiers of Analog Circuits
• It is provided that the lower cut-off frequency of an individual amplifier is 25Hz, find the net cut-off frequency of a cascaded network of 8 similar amplifiers.(a) 200 Hz(b) 83 Hz(c) 100 Hz(d) 25 HzI got this question during an interview.This intriguing question comes from Cascaded Amplifier topic in chapter General and Feedback Amplifiers of Analog Circuits
• Given that the higher cut-off frequency of the cascaded network of 6 amplifiers is 2Mhz, find the higher cut-off frequency of one amplifier, if all amplifiers are similar.(a) 5.7 Mhz(b) 0.33 Mhz(c) 12 Mhz(d) 64 MhzI had been asked this question in exam.This question is from Cascaded Amplifier in section General and Feedback Amplifiers of Analog Circuits
• The lower and upper cutoff frequencies of an amplifier are unknown. If originally, individual BW of such an amplifier is B1, and now the bandwidth of the cascaded network of 10 such amplifiers is B2, find B2/B1.(a) 0.26(b) 3.84(c) Insufficient data(d) 5I got this question in unit test.The above asked question is from Cascaded Amplifier topic in division General and Feedback Amplifiers of Analog Circuits
• Provided a cascade multistage amplifier network, their pole frequencies obtained are f1=10Mhz, f2=12Mhz, f3=20Mhz, f4=16Mhz. What is the approximate higher cutoff frequency of the cascaded network?(a) 3.4 Mhz(b) 8 Mhz(c) 5 Mhz(d) 6 MhzThe question was asked during an interview.I'd like to ask this question from Cascaded Amplifier in division General and Feedback Amplifiers of Analog Circuits
• Which of these are incorrect about Darlington amplifier?(a) It has a high input resistance(b) The output resistance is low(c) It has a unity voltage gain(d) It is a current bufferThe question was asked in an interview.My question is based upon Cascade and Darlington Amplifier topic in chapter General and Feedback Amplifiers of Analog Circuits
• In a Darlington pair, the overall β=15000.β1=100. Calculate the collector current for Q2 given base current for Q1 is 20 μA.(a) 300 mA(b) 298 mA(c) 2 mA(d) 200mAI got this question by my school principal while I was bunking the class.I'd like to ask this question from Cascade and Darlington Amplifier in portion General and Feedback Amplifiers of Analog Circuits
• Darlington amplifier is an emitter follower.(a) True(b) FalseThe question was asked in a national level competition.My enquiry is from Cascade and Darlington Amplifier in portion General and Feedback Amplifiers of Analog Circuits