Analog Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 39 - 42 of 249

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Question 39

Appeared in Year: 2010

Question

MCQ▾

The amplifier circuit shown below uses a silicon transistor. The capacitors and can be assumed to be short at signal frequency and effect of output resistance can be ignored. If is disconnected from the circuit, which one of the following statements is true

The Circuit Consists of Transistor, Capacitor and Resisters

Choices

Choice (4)Response

a.

The input resistance increases and magnitude of voltage gain decreases

b.

Input resistance and the magnitude of voltage gain increases

c.

Input resistance and magnitude of voltage gain decreases

d.

The input resistance decreases and magnitude of voltage gain increases

Passage

In the following transistor circuit, and and all the capacitances are very large

The Circuit Consists of Transistor, Capacitors and Resistors

Question 40 (1 of 2 Based on Passage)

Appeared in Year: 2008

Question

MCQ▾

The value of DC current is

Choices

Choice (4)Response

a.

10 mA

b.

1 mA

c.

5 mA

d.

2 mA

Question 41 (2 of 2 Based on Passage)

Analog Circuits
Mid-Frequency Small Signal Analysis and Frequency Response

Appeared in Year: 2008

Question

MCQ▾

The mid-band voltage gain of the amplifier is approximately

Choices

Choice (4)Response

a.

- 90

b.

- 120

c.

- 180

d.

- 60

Question 42

Analog Circuits
Mid-Frequency Small Signal Analysis and Frequency Response

Appeared in Year: 2013

Question

MCQ▾

The ac schematic of an NMOS common-source state is shown in the figure below, where part of the biasing circuits has been omitted for simplicity. For the n -channel MOSFET M, the transconductance = 1 mA/V, and body effect and channel length modulation effect are to be neglected. The lower cut-off frequency in HZ of the circuit is approximately at

Voltage Feedback with Input and Output

Choices

Choice (4)Response

a.

200

b.

50

c.

32

d.

8

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