Which type of device limits some part of a waveform from exceeding a specified value?

A limiter is a device specifically designed to restrict the amplitude of a waveform so that it does not exceed a predetermined threshold. This is crucial in various audio and signal processing applications where maintaining signal integrity is important while avoiding distortion caused by signal peaks that exceed operational limits. Limiters are invaluable in protecting sensitive equipment from damage due to excessive signal levels and ensuring consistent audio levels in broadcasting and live sound reinforcement.

In contrast, a rectifier converts alternating current (AC) to direct current (DC), which does not directly pertain to limiting waveform values. A clamper shifts the waveform vertically without altering its shape, thus affecting the DC level rather than the amplitude peaks. A filter, on the other hand, modifies the frequency content of the waveform, allowing certain frequencies to pass while attenuating others, but does not inherently limit the amplitude of the waveform itself.