Switched capacitor digital-to-analog converter

Details Switched capacitor digital-to-analog converter Switched capacitor digital-to-analog converter

2009-03-12

2010-11-09

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

07830290

ABSTRACT:
A switched capacitor digital-to-analog converter (SC-DAC) is provided. The SC-DAC of the present invention can eliminate an influence of a reference voltage source caused by a signal dependent loading at each clock cycle, so as to completely solve a harmonic distortion of an analog output signal converted by a conventional SC-DAC. In addition, when the SC-DAC of the present invention has a plurality of converting channels, since the reference voltage source is not influenced by the effect of signal dependent loading of any converting channel, so that each converting channel can be regarded to have a separate state, and thus the purpose of channel separation can be achieved.

REFERENCES:
patent: 5790064 (1998-08-01), Fujimori
patent: 5892473 (1999-04-01), Shin
patent: 5923275 (1999-07-01), Kalb
patent: 6147631 (2000-11-01), Maulik et al.
patent: 6194946 (2001-02-01), Fowers
patent: 6573850 (2003-06-01), Pennock
patent: 6952176 (2005-10-01), Frith et al.
patent: 7102557 (2006-09-01), Frith

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