Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-07-09
2010-12-28
Nguyen, Chanh (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S214000, C348S602000
Reexamination Certificate
active
07859511
ABSTRACT:
A DC-DC converter includes a temperature compensation circuit arranged between a feedback differential amplification circuit and an output voltage detection circuit to compensate the variation of the voltage level of the DC output voltage of the converter caused by ambient temperature changes. The temperature compensation circuit includes a temperature detection circuit that detects the ambient temperature and, in response thereto, generates a temperature signal; and a current source circuit that is connected between a feedback signal input terminal of the feedback differential amplification circuit and the output voltage detection circuit. The current source circuit, based on the temperature signal, generates an electrical current and a compensation voltage proportional to the electrical current. The compensation voltage is applied to the DC output voltage to thereby regulate the voltage level of the DC output voltage. The temperature signal is a temperature signal of positive temperature characteristics and/or a temperature signal of negative temperature characteristics.
REFERENCES:
patent: 7038654 (2006-05-01), Naiki et al.
patent: 7327129 (2008-02-01), Chen et al.
patent: 2005/0184946 (2005-08-01), Pyoun et al.
Chu Hung-Chi
Shen Yuhren
Wang Ming-Chia
Nguyen Chanh
Rosenberg , Klein & Lee
Vastview Technology Inc.
Yang Kwang-Su
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