Charge redistribution digital-to-analog converter, and...

Details Charge redistribution digital-to-analog converter, and... Charge redistribution digital-to-analog converter, and...

2011-08-23

2011-08-23

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S150000, C341S163000

Reexamination Certificate

active

08004449

ABSTRACT:
A D/A converter includes plus-side and minus-side input terminals; plus-side and minus-side D/A converters each including plural plus-side or minus-side capacitors having capacitance values weighted by the powers of two, a plus-side or minus-side output terminals connected to first electrodes of the plus-side or minus-side capacitors, and plural plus-side or minus-side switches for connecting each second electrode of the plus-side or minus-side capacitors to either the plus-side or minus-side input terminal, a plus-side reference voltage terminal or a minus-side reference voltage terminal according to plus-side or minus-side control digital signals; and plural short-circuit switches provided between identically weighted plus-side and minus-side capacitors respectively. And, at the time of sampling, the plus-side and minus-side switches connect the second electrodes of the capacitors to the plus-side and minus-side input terminals, respectively, and, after the sampling, the plurality of short-circuit switches short-circuit between the second electrodes of the plus-side and minus-side capacitors.

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