Digital/analog conversion device and display device having...

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

Reexamination Certificate

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C345S100000, C341S144000

Reexamination Certificate

active

10802771

ABSTRACT:
A pulse number control circuit inputs, to a charge pump circuit, pulses of a number according to digital data constituted of weighted data bits. The charge pump circuit includes a pump capacitor connected between a first node to which the pulses are input and a second node, a switch element connected between the second node and an output node, and a bias circuit. According to a change of a voltage on the output node, the bias circuit changes a voltage on the second node with the same polarity.

REFERENCES:
patent: 6157332 (2000-12-01), Frank et al.
patent: 6600435 (2003-07-01), Karube
patent: 6771200 (2004-08-01), Frulio et al.
patent: 7136058 (2006-11-01), Nakamura et al.
patent: 2002/0190971 (2002-12-01), Nakamura et al.
patent: 0 604 397 (1994-06-01), None
patent: 2002-111499 (2002-04-01), None
patent: 2002-344318 (2002-11-01), None
patent: 2002-344319 (2002-11-01), None
Shirato, Yoshio., et al. “Exhaustive Guide to Analog IC with Illustrations.” Tokyo Denki University Press, Nov. 1986, pp. 258-260.

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