Patent ID: 9035814
Filing Date: 2015-05-19
Classification: H03M

Abstract:
1. A feedforward delta-sigma modulator, comprising: a successive approximation analog-to-digital converter comprising N+1 input terminals, and an output terminal for outputting a digital signal, wherein an input terminal of the N+1 input terminals is used for receiving an analog input signal, and N is a positive integer; a digital-to-analog converter coupled to the output terminal of the successive approximation analog-to-digital converter for receiving the digital signal, and generating an analog feedback signal accordingly; N integrators, wherein an output terminal of each integrator of the N integrators is coupled to a corresponding input terminal of the N+1 input terminals; a first adder coupled to the digital-to-analog converter for summing the analog input signal and the analog feedback signal to a first integrator of the N integrators; a second adder coupled to an input terminal of a K an optimization zero generation unit coupled between the second adder and an output terminal of the (K+1)