MODULATOR SYSTEM AND MODULATION METHOD

PROBLEM TO BE SOLVED: To solve the following problem: in a delta-sigma modulator, techniques are needed for improving SQNR performance without degrading size, power consumption, stability, or bandwidth. SOLUTION: An input U205 is given to addition nodes 210, 215. An output of the node 210 is given to an input of an integrator 220 and an output of the integrator is given to a node 225. An output of the node 225 is given to the node 215, and an output of the node is given to a quantizer 230, which supplies an output V235, and a node 240. An output of the quantizer 230 is also given through a feedback path 245 to the node 210. An output of the node 240 is given to delay elements 250, 255. An output of the delay element 255 is given to the node 225. An output of the delay element 250 is given to feedback stages 260, 265 and respective outputs of the feedback stages are given to the node 225. In the node 240, an input signal for the quantizer 230 is subtracted from the output of the quantizer 230. COPYRIGHT: (C)2011,JPO&INPIT