Patent ID: 7373125

Claim:
A communication module comprising: a variable gain amplifier; a mixer stage responsive to the variable gain amplifier; a post-mixer amplifier stage responsive to the mixer stage, the post-mixer amplifier stage to produce an amplified first differential signal and an amplified second differential signal; an off-channel signal detector responsive to the post-mixer amplifier stage, the off-channel signal detector having a first input to receive the amplified first differential signal and having a second input to receive the amplified second differential signal, the off-channel signal detector including a programmable hysteresis comparator module, the off-channel signal detector to produce an output signal to indicate whether an off-channel signal condition is detected, wherein the programmable hysteresis comparator module has a programmable hysteresis threshold; and wherein the programmable hysteresis comparator module includes a comparator element and a summer element having a first input and a second input, the first input responsive to a voltage threshold detector, the second input responsive to a multiplexer.