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- Subject
- Operational Amplifierelectrical-engineering-mcqs › operational-amplifier
- Published
- 23 Dec 2018
- Last updated
- 28 May 2026
Explanation
The tail current in a differential amplifier is the combined current flowing through both emitters, which means it is the sum of the two emitter currents. This current is essential for the operation of the differential pair.
More Operational Amplifier MCQs
Practice related questions from the same subject.
- 1.An operational amplifier's output voltage rises by 8 volts over a period of 12 microseconds. What is the slew rate of the op-amp?
- 2.What effect does negative feedback have on a circuit's input impedance and bandwidth?
- 3.In a differential amplifier, the differential voltage gain is calculated as RC divided by which of the following?
- 4.In a differential amplifier, the gain for common-mode signals is given by the value of RC divided by which of the following?
- 5.How does the common-mode voltage gain compare to the differential voltage gain?
- 6.The input impedance of a differential amplifier is given by r’e multiplied by which of the following?
- 7.What is the approximate voltage at the node located at the top of the tail resistor?
- 8.What types of signals can an operational amplifier amplify?
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