Patent ID: 6148189
Filing Date: 2000-11-14
Classification: H03G,H04N

Abstract:
A signal processing system comprising:a first AGC means for adjusting the amplitude of a first signal in response to a first AGC control signal and providing an adjusted first output signal;a first signal processing means for receiving the first adjusted output signal from the first AGC means and providing a first output signal;a second AGC means for adjusting the amplitude of the first output signal in response to a second AGC control signal and providing a second adjusted output signal;a mixer means for shifting the frequency of the second adjusted output signal and providing an IF signal;an IF signal processing means and IF AGC means for respectively processing the IF signal and adjusting the amplitude of the IF signal in response to a third AGC control signal, and providing a third adjusted output signal;means for generating said first, second and third AGC control signals in response to an output of the mixer; and whereinthe means for generating includes a microprocessor which is also responsive to a second characteristic of the third adjusted output signal.