Delta sigma modulation D/A converting system

Details Delta sigma modulation D/A converting system Delta sigma modulation D/A converting system

2007-07-12

2008-10-21

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S077000, C341S144000, C341S152000

Reexamination Certificate

active

07439893

ABSTRACT:
By using a selector, an output of a delta sigma modulator having a quantizer for quantizing a signal is selectively supplied to one of a first D/A converter having a linear amplifier and a second D/A converter having a digital amplifier. Further, the number of quantization levels of the quantizer, the sampling frequency, or the order of a transfer function of the delta sigma modulator is selected by a control signal selector in conjunction with the selector. An output of the first D/A converter is supplied to a line terminal, while an output of the second D/A converter is supplied to a headphone terminal.

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U.S. Appl. No. 11/689,530 filed on Mar. 22, 2007, Yusaku Tada, et al.,with claiming priority based on Japanese Application No. 2006-119679.

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