In the following circuit, what is the voltage at the source of the M1?(a) Vin * Rs / (Rs + 1/gm)(b) Vin * Rs / (Rs + gm)(c) Vin * Rs / (Rs – 1/gm)(d) Vin * Rs / (Rs + 2/gm)This question was addressed to me in an interview for job.My question comes from MOSFET Amplifier with CG Configuration in section FET Amplifiers of Analog Circuits

In the following circuit, what is the voltage at the source of the M1?

1.	In the following circuit, what is the voltage at the source of the M1?(a) Vin * Rs / (Rs + 1/gm)(b) Vin * Rs / (Rs + gm)(c) Vin * Rs / (Rs – 1/gm)(d) Vin * Rs / (Rs + 2/gm)This question was addressed to me in an interview for job.My question comes from MOSFET Amplifier with CG Configuration in section FET Amplifiers of Analog Circuits
Answer» CORRECT option is (a) Vin * Rs / (Rs + 1/gm) Easiest explanation: The impedance looking into the source of M1 is 1/gm. Vin experiences a potential DIVIDER before entering the source of M1. The voltage drop across Rs is TYPICALLY the voltage at the source and HENCE, it is equal to Vin * Rs / (Rs + 1/gm).

Discussion

No Comment Found

Related InterviewSolutions

JFET is a ______ carrier device.(a) Unipolar(b) Bipolar(c) Minority(d) MajorityI got this question in an interview for job.I would like to ask this question from Characteristics of JFET in chapter FET Amplifiers of Analog Circuits
The n-channel JFET, the pinch off voltage is ______________(a) not greater than 0(b) greater than or equal to 0(c) less than or equal to 0(d) not less than 0This question was posed to me during an internship interview.The question is from Characteristics of JFET topic in chapter FET Amplifiers of Analog Circuits
The built-in barrier potential in a N-channel JFET is ___________(a) less than the internal pinch-off voltage(b) equal to the internal pinch-off voltage(c) greater than the internal pinch-off voltage(d) not related to the internal pinch-off voltageI have been asked this question by my college professor while I was bunking the class.Query is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits
If channel thickness increases, the internal pinch-off voltage ___________(a) Decreases(b) Increases(c) Remains the same(d) Increases logarithmicallyI got this question during an interview.Enquiry is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits
If the doping concentration of the gate increases, the internal pinch-off voltage ___________(a) Increases logarithmically(b) Increases linearly(c) Increases exponentially(d) Decreases linearlyThis question was addressed to me during an online interview.I'd like to ask this question from Characteristics of JFET topic in portion FET Amplifiers of Analog Circuits
The cut-off frequency of a JFET is that time when the magnitude of the input current is ___________(a) Greater than the output current(b) Less than the output current(c) Equal to the output current(d) Twice the output currentI have been asked this question by my college professor while I was bunking the class.The doubt is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits
The cut-off frequency of a JFET is ___________(a) linearly related to the transconductance of the JFET(b) inversely proportional to the transconductance of the JFET(c) exponentially related to the transconductance of the JFET(d) logarithmically related to the transconductance of the JFETThis question was posed to me in exam.This key question is from Characteristics of JFET topic in chapter FET Amplifiers of Analog Circuits
How is the transconductance at saturation related to the pinch off voltage of the JFET?(a) Inversely proportional(b) Directly proportional(c) Inverse-squarely related(d) Directly and proportional to square of the pinch-off voltageI have been asked this question in an international level competition.Question is from Characteristics of JFET topic in portion FET Amplifiers of Analog Circuits
When an N-channel JFET reaches pinch-off, the increase in the drain to source voltage results in shifting of the pinch-off position towards the ___________(a) Gate(b) Drain(c) Source(d) Does not shiftI got this question in unit test.My query is from Characteristics of JFET topic in division FET Amplifiers of Analog Circuits
An N-channel JFET is ___________(a) Always ON(b) Always OFF(c) Enhancement mode JFET(d) Has a p-type substrateThis question was addressed to me in homework.My enquiry is from Characteristics of JFET topic in chapter FET Amplifiers of Analog Circuits

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment