Patent ID: 7183957

Claim:
A signal processing system comprising an analog-to-digital converter, the analog-to-digital converter comprising: a main loop filter having a transfer function H MAIN , the main loop filter comprising: a signal input to receive an input signal; a quantizer; a first digital-to-analog converter coupled to an output of the quantizer, the first digital-to-analog converter comprising a duty cycle modulator; a finite impulse response filter coupled to an output of the first digital-to-analog converter; an integrator coupled to the signal input, to an output of the finite impulse response filter, and to an input of the quantizer; and a stabilizer loop coupled to an output of the quantizer and an input to the quantizer, the stabilizer loop having a transfer function H ST ; wherein a target transfer function of the analog-to-digital converter is H T , and H T comprises a combination of H MAIN and H ST .