Patent ID: 8917198

Claim:
An apparatus for converting a continuous-time, continuously variable signal into a sampled and quantized signal, comprising: an input line for accepting an input signal that is continuous in time and continuously variable; a plurality of processing branches coupled to the input line, each of said processing branches including: (a) a bandpass-oversampling quantization circuit, and (b) a digital bandpass filter coupled to an output of the bandpass-oversampling quantization circuit; and a combining circuit, coupled to outputs of a plurality of said processing branches, that combines signals on said outputs into a final output signal, wherein each of a plurality of the bandpass-oversampling quantization circuits includes an adjustable circuit component which, when adjusted, changes a frequency at which a quantization-noise frequency response of said bandpass-oversampling quantization circuit is minimized, while a transfer function of said bandpass-oversampling quantization circuit with respect to the input signal remains at least approximately all-pass, and wherein each of a plurality of said digital bandpass filters includes at least one adjustable parameter which, when adjusted, changes a frequency passband of said digital bandpass filter.