SSB receiver with improved feedforward AGC

摘要: SSB receivers which use feedback and feedforward automatic gain control (AGC) are subject to bursts of noise in the audio output due action AGC when signals having low signal (S/N) ratios being received. This invention minimizes such by disabling at a predetermined threshold S/N ratio independent voltage. Noise within received channel is bandpass filtered first generated has an amplitude proportional noise. The compared with reference voltage corresponds disabled.