Analog Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 69 - 72 of 249

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Question 69

Analog Circuits
Biasing, Bias Stability

Appeared in Year: 2000

Question

MCQ▾

The current gain of a bipolar transistor drops at high frequencies because of

Choices

Choice (4)Response

a.

The early effect

b.

Transistor capacitances

c.

High current effects in the base

d.

Parasitic inductance effects

Question 70

Analog Circuits
Biasing, Bias Stability

Appeared in Year: 1999

Question

MCQ▾

An NPN transistor (with C = 0.3 pF) has a unity gain Cutoff frequency of 400 MHz at a dc bias current The value of its is approximately

Choices

Choice (4)Response

a.

30

b.

96

c.

50

d.

15

Question 71

Analog Circuits
Simple Op-Amp Circuits

Appeared in Year: 2006

Question

MCQ▾

For the circuit shown in the following figure, the capacitor C is initially uncharged. At the switch S is closed. The across the capacitor at millisecond is In the figure shown above, the OP-AMP is supplied with

The Figure Consists of a Non-Inverting Operational Amplifier

Choices

Choice (4)Response

a.

0 Volt

b.

9.45 Volts

c.

10 Volts

d.

6.3 Volt

Question 72

Analog Circuits
Clipping, Clamping and Rectifiers

Appeared in Year: 2004

Question

MCQ▾

In a full-wave rectifier using two ideal diode, and are the dc and peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier are

Choices

Choice (4)Response

a.

b.

c.

d.

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