Continuous time delta sigma modulator, analog to digital converter and associated compensation method
A continuous time delta sigma modulator includes a summing circuit, a loop filter, an extraction circuit, a quantizer and a digital to analog converter. The summing circuit is arranged for subtracting a feedback signal by an input signal to generate a residual signal. The loop filter includes a plurality of amplifying stages connected in series and is arranged to receive the residual signal to generate a filtered residual signal. The extraction circuit is arranged for extracting a current from one of the amplifying stages and forwarding the extracted current to a following one of the amplifying stages. The quantizer is arranged for generating a digital output signal according to the filtered residual signal. The digital to analog converter is arranged for performing a digital to analog converting operation upon a signal derived from the digital output signal to generate the feedback signal to the summing circuit.
MEDIATEK INC.
H H H H
H03M H03M H03M H03M
inventional inventional inventional inventional
Chen-Yen Tze-Chien Yu-Hsin
Ho Wang Lin