- - The second-order feed-forward delta-sigma modulator

摘要

The present invention relates to a delta-sigma modulator, comprising: a first integrator for integrating quantization noise; an analog signal processing block for transferring an output signal of the first integrator to a second integrator and having a predetermined transfer function; A second integrator for integrating the output signal of the block, a feedforward signal of the input signal and an adder for summing the output signal of the second integrator, and a quantizer for quantizing the output signal of the adder, And the feedforward path between the first integrator and the adder is replaced with the present invention, the area and power of the modulator can be reduced while maintaining the advantages of the existing feed-forward structure.