Patent ID: 6748200
Filing Date: 2004-06-08
Classification: H03D,H03G,H04B

Abstract:
A method of controlling amplification of a signal received by a ZIF radio having a power level within a predetermined full power range relative to a predetermined minimum noise floor, comprising:amplifying the received signal using a baseband amplifier with a plurality of gain settings; converting the received signal to a digital signal using an analog to digital converter (ADC); and controlling said amplifying of the received signal for tracking noise floor and for attempting to acquire the received signal while limiting DC change within an available DC budget of the ADC, said controlling comprising: obtaining actual noise floor level by setting gain up to a maximum gain level within a first story power range at a lower end of the full power range sufficient for the ADC to view the minimum noise floor; detecting an overload condition and switching gain in a single gain step to within a third story power range at an upper end of the full power range sufficient for the ADC to view the received signal; and detecting a saturation condition of the ADC and switching gain in a single gain step to within a second story power range between the first and second story power ranges sufficient for the ADC to view the received signal.