Patent ID: 7696913

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 the quantizer, the first digital-to-analog converter comprising a duty cycle modulator; a finite impulse response filter coupled to the first digital-to-analog converter; a first integrator coupled to the signal input, to an output of the finite impulse response filter, and to an input of the quantizer; a second integrator coupled between the first integrator and the quantizer; and a stabilizer loop having a transfer function H ST , wherein the stabilizer loop includes a stabilizer path and the stabilizer path includes (i) an input coupled to an output of the quantizer and (ii) an output connected directly to an input of the second integrator; 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 .