For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________(a) 19(b) 30(c) 29(d) 1The question was asked in an international level competition.The above asked question is from Oscillators in section Power Amplifiers of Electronic Devices & Circuits

For a phase-shift oscillator, the gain of the amplifier stage must be

1.	For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________(a) 19(b) 30(c) 29(d) 1The question was asked in an international level competition.The above asked question is from Oscillators in section Power Amplifiers of Electronic Devices & Circuits
Answer» Correct ANSWER is (c) 29 Easy EXPLANATION: Since the resistor-capacitor combination in the RC Oscillator circuit also acts as an attenuator producing an attenuation of -1/29th ( Vo/Vi = β ) per STAGE, the GAIN of the amplifier must be sufficient to overcome the circuit losses. Therefore, in our three stage RC network above the amplifier gain must be greater than 29.

Discussion

No Comment Found

Related InterviewSolutions

What is the value of input voltage, if Aβ=1 and input voltage is 5V?(a) 0(b) 2(c) 5(d) 10The question was asked in unit test.I would like to ask this question from Oscillators in section Power Amplifiers of Electronic Devices & Circuits
What is cross over distortion?(a) Effect occurred during switching of transistor after every half cycle(b) Distortion occurred due to resistors(c) Distortion occurred due to Capacitors(d) Distortion occurred due to InductorsI had been asked this question by my school principal while I was bunking the class.I want to ask this question from Class B Amplifiers in chapter Power Amplifiers of Electronic Devices & Circuits
Which is the main disadvantage of class B amplifiers?(a) Expensive(b) Less efficient(c) More power dissipation(d) More heat dissipationThis question was addressed to me during an online interview.My question comes from Class B Amplifiers topic in section Power Amplifiers of Electronic Devices & Circuits
For a Class B amplifier, the utilized load power is 300W and the Dc power is 500W, find efficiency.(a) 30%(b) 60%(c) 90%(d) 100%I had been asked this question in an interview.This key question is from Class B Amplifiers topic in portion Power Amplifiers of Electronic Devices & Circuits
What is the value of the maximum efficiency of the class B amplifier?(a) 25%(b) 35%(c) 35% to 50%(d) 50% to 70%I had been asked this question by my school principal while I was bunking the class.Query is from Class B Amplifiers topic in chapter Power Amplifiers of Electronic Devices & Circuits
Where does the Q point lie for class B amplifier?(a) Active(b) Cut off(c) Saturation(d) Between saturation and activeI have been asked this question during a job interview.I need to ask this question from Class B Amplifiers in chapter Power Amplifiers of Electronic Devices & Circuits
The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot.(a) True(b) FalseThe question was posed to me in an online quiz.My doubt is from Oscillators topic in portion Power Amplifiers of Electronic Devices & Circuits
An input signal is needed for an oscillator to start.(a) True(b) FalseI have been asked this question during an interview for a job.Enquiry is from Oscillators in division Power Amplifiers of Electronic Devices & Circuits
What is the conduction angle for Class B push-pull amplifier?(a) 0(b) 90(c) 180(d) 270The question was posed to me during an online exam.This interesting question is from Class B Amplifiers in chapter Power Amplifiers of Electronic Devices & Circuits
Class B amplifier Produces output even if the input is zero.(a) True(b) FalseI have been asked this question in a national level competition.Enquiry is from Class B Amplifiers in portion Power Amplifiers of Electronic Devices & Circuits

For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________(a) 19(b) 30(c) 29(d) 1The question was asked in an international level competition.The above asked question is from Oscillators in section Power Amplifiers of Electronic Devices & Circuits

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment