GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 185 - 189 of 1076

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Question 185

Appeared in Year: 2009

Question

MCQ▾

In the circuit shown below, the op-amp is ideal, the transistor has and decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op-amp.

The Circuit Consists of a BJT and an OPAMP

Choices

Choice (4)Response

a.

Positive feedback,

b.

Negative feedback,

c.

Positive feedback,

d.

Negative feedback,

Question 186

Appeared in Year: 2001

Question

MCQ▾

The ideal has the following characteristics

Choices

Choice (4)Response

a.

b.

c.

d.

Question 187

Appeared in Year: 2002

Question

MCQ▾

A 741 OP-AMP has a gain-bandwidth product of 1 MHz. A non-inverting amplifier using this OP-AMP and having a voltage gain of 20 dB will exhibit a dB bandwidth of

Choices

Choice (4)Response

a.

b.

c.

d.

Passage

In the circuit shown, assume that the OP-AMP is ideal.

The Ideal Operational Amplifier Using BJT in the Feedback

Question 188 (1 of 3 Based on Passage)

Appeared in Year: 2001

Question

MCQ▾

Suppose that the transistor in the feedback path is replaced by a PN junction diode with a reverse saturation current of . The P-side of the diode is connected to node A and the N-side to node B. then what is the expression for in terms of and ?

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 189 (2 of 3 Based on Passage)

Appeared in Year: 2001

Question

MCQ▾

If pA and the thermal voltage , then what is the value of the output voltage for an input voltage

Choices

Choice (4)Response

a.

b.

c.

d.

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