Question

when a differential amplifier is operated single - ended, select one: a. the output is not inverted b. one input is grounded and a signal is applied to the other c. the output is grounded d. both inputs are connected together

Explanation:

To solve this, we analyze each option based on the operation of a differential amplifier in single - ended mode:

• Option a: In single - ended operation of a differential amplifier, the output can be inverted depending on the input configuration, so this is incorrect.
• Option b: In single - ended operation of a differential amplifier, one input is grounded (connected to 0V) and the signal is applied to the other input. This is the correct description of single - ended operation.
• Option c: The output of a differential amplifier in single - ended mode is not grounded. The output is a signal related to the input signal, so this is incorrect.
• Option d: In single - ended operation, we don't connect both inputs together. One is grounded and the other has the signal, so this is incorrect.

Answer:

b. one input is grounded and a signal is applied to the other