Delta sigma modulating apparatus

Details Delta sigma modulating apparatus Delta sigma modulating apparatus

2006-08-01

2006-08-01

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07084797

ABSTRACT:
A first second- or higher-order delta sigma modulator and a second second- or higher-order delta sigma modulator having a notch characteristic are cascaded together, and a delayed signal of the output of the first delta sigma modulator and a differential signal of the output of the second delta sigma modulator are added together. The amount of feedback from the output portion to the input portion of the first delta sigma modulator and the amount of feedback from the output portion to the input portion of the second delta sigma modulator are made the same.

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Inukai et al. (U.S. Appl. No. 10/865,885) , “Cascade delta sigma modulator”, filed on Jun. 14, 2004.

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