Schaltungsanordnung zum Begrenzen der Dynamik von Signalen

摘要

A sinusoidal signal voltage of varying amplitude Vi is compared with a triangular voltage wave of relatively elevated frequency and amplitude to generate a binary voltage with a first value for signal amplitudes higher than the wave amplitude and a second value for signal amplitudes lower than the wave amplitude. The resulting pulse train, upon integration, produces a replica of the original signal having an amplitude Vo. To vary the ratio Vo/Vi, specifically to reduce it for higher signal amplitudes, a square wave giving rise to the triangular wave is amplitude-modulated in response to the peaks of the signal voltage Vi.