Patent ID: 7489745
Filing Date: 2009-02-10
Classification: H04B,H04L

Abstract:
1. Receive path circuitry for a reconfigurable direct RF bandpass sampling receiver, comprising: bandpass filter circuitry having a tunable center frequency dependent upon a filter control signal, the center frequency being tunable across a frequency range of interest, and the tunable bandpass filter having a bandwidth less than the frequency range of interest; sampling circuitry configured to receive a filtered signal from the tunable bandpass filter circuitry and to receive a bandpass sampling clock signal as an input, the bandpass sampling clock signal meeting Nyquist sampling criteria of the bandpass filter but not meeting Nyquist sampling criteria of the total frequency range of interest; and clock generation circuitry coupled to provide the sampling clock signal to the sampling circuitry, the clock generation circuitry being configured to generate at least two selectable sampling clock signals, each sampling clock signal being configured to correspond to a different frequency so that Nyquist boundaries associated with the first sampling clock signal are different from the Nyquist boundaries associated with the second sampling clock signal.