Patent ID: 7496158

Claim:
Receive path circuitry for a receiver configured to receive frequency modulated signals, comprising: a bandpass filter configured to receive an input signal having a frequency that varies over time within a frequency band, the bandpass filter having a bandwidth less than a bandwidth for the frequency band, having a center frequency that is sweepable across the frequency band and having a sweep control signal as an input that is configured to determine a location of the center frequency for the bandpass filter within the frequency band; filter sweep control circuitry coupled to the bandpass filter to provide the sweep control signal, the filter sweep control circuitry being configured to control the sweep control signal to cause the center frequency of the bandpass filter to be swept across the frequency band to track the frequency of the input signal as it varies over time within the frequency band; and an analog-to-digital converter (ADC) coupled to sample an output from the sweepable bandpass filter at a sampling frequency that is dependent upon a sampling clock input to the ADC.