SN76477 Overview
The SN76477 plex sound qenerator is a monolithic chip bining both analog (bipolar) and digital (l2L) circuirrv. lt includes a noise senerator, a voltage'controlled oscillator (VCO), and a supetrlow_Jrequency oscillator (SLF) tosether with a noise filter. mixer, attack/decay circuitry, audio amplifier, and controL circuitry to provide noise, tone, or lowJrcquency sounds and any binations of these.