High-accuracy capacitor digital-to-analog converter

Details High-accuracy capacitor digital-to-analog converter High-accuracy capacitor digital-to-analog converter

2006-10-17

2006-10-17

Callahan, Timothy P. (Department: 2819)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

By integrating

C341S144000

Reexamination Certificate

active

07123072

ABSTRACT:
A capacitor digital-to-analog converter for N-bit digital-to-analog conversion comprises a converter capacitor network comprising 2Ncapacitors and 2N+1 MOS switches and an output buffer. The MOS switches are connected in a series chain at their respective source/drain, and each of the capacitors has a first electrode connected to a corresponding joining node between two consecutive MOS switches in the series chain and a second electrode connected together to a common node. The output buffer comprises a differential amplifier and an output amplifier, the differential amplifier has 2Ndiscrete inputs each connected to a corresponding one of the first electrodes of the capacitors in the converter capacitor network.

REFERENCES:
patent: 5767801 (1998-06-01), Okamoto
patent: 6081218 (2000-06-01), Ju et al.
patent: 6271784 (2001-08-01), Lynn et al.
patent: 6448917 (2002-09-01), Leung et al.

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