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Electronic Devices - Operational Amplifiers

Exercise : Operational Amplifiers - General Questions
21.
An RC network has R = 47 k and C = 0.22 F. What is the cutoff frequency?
154 Hz
1540 Hz
1.54 Hz
15.4 Hz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A certain op-amp has an open-loop voltage gain of 150,000. What is this gain expressed in dB?
51.7 dB
103.5 dB
150,000 dB
5.18 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
An IC unit made using both ________ and ________ transistors is called a ________ circuit.
bipolar, MOSFET, BiFET
bipolar, MOSFET, BiMOS
TTL, MOSFET, TailFET
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.

Refer to the given figure. You need an amplifier with an input impedance of 12 k. You must not change the amplifier voltage gain. The new value of Ri would be ________ and the new value of Rf would be ________.

10 k, 100 k
13.3 k, 120 k
12 k, 108 k
12 k, 120 k
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
What is the slew rate of an op-amp if the output voltages change from 2 V to 3 V in 0.2 ms?
5 V/ms
3 V/ms
2 V/ms
1 V/ms
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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