Which type of device produces two signals that differ in phase from each other from a single input signal?

A phase splitter is designed specifically to produce two output signals that are phase-shifted relative to each other from a single input signal. This is a fundamental function in many electronic circuits where it is necessary to have two signals that are 180 degrees out of phase, which is commonly used in audio and telecommunications systems. By utilizing a phase splitter, the integrity of the signal is maintained while allowing for the separation of phases, which can be crucial for certain applications, such as driving differential amplifiers or creating balanced audio signals.

In contrast, a signal amplifier primarily increases the amplitude of a signal but does not inherently create multiple signals with phase differences. A phase shifter modifies the phase of a single signal but does not necessarily produce multiple outputs. A modulator, on the other hand, alters a carrier signal based on the characteristics of an input signal for purposes such as transmission and encoding but does not focus on producing two distinct phase-shifted signals from a single input. The definition and role of the phase splitter clearly align with the requirement of generating dual output signals with different phases from one input.