Single message multilevel analog signal recording and playback system

摘要

This invention discloses an integrated circuit for processing an audio signal of a message. The integrated circuit comprises a record circuit, an analog storage circuit, and a playback circuit. The record circuit is coupled to receive the audio signal and generates a filtered signal. The analog storage circuit is AC-coupled to the record circuit for storing the filtered signal. The playback circuit is coupled to the analog storage circuit for retrieving a stored signal in the storage circuit. <IMAGE>