Question

when an op-amp is operated in the single - ended differential mode,
select one:
○ a. the output is grounded
○ b. both inputs are connected together
○ c. both inputs are grounded
○ d. one input is grounded and the signal is applied to the other input

Explanation:

Single-ended differential mode for an op-amp is defined by grounding one input terminal and applying the input signal exclusively to the remaining input terminal. The other options do not match this operational definition: option a incorrectly describes the output, option b refers to a common-mode setup, and option c describes a zero-input state.

Answer:

d. one input is grounded and the signal is applied to the other input