Correction circuit for D/A converter

Details Correction circuit for D/A converter Correction circuit for D/A converter

2010-03-02

2011-11-29

Jeanglaude, Jean (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S119000, C341S120000, C341S144000

Reexamination Certificate

active

08068044

ABSTRACT:
There is provided a correction circuit for a D/A converter, comprising: a constant current source to be connected between high- and low-potential power source lines for supplying a power source voltage to the D/A converter; and a current controller which is adapted to control a current flowing to the constant current source in accordance with an input digital signal to the D/A converter, so as to reduce a variation of a sum of currents which, when the input digital signal to the D/A converter is changed, flows to the low-potential power source line from the high-potential power source line through the D/A converter and the constant current source, respectively.

REFERENCES:
patent: 6118262 (2000-09-01), Suzuki
patent: 2008/0224773 (2008-09-01), Tsuji et al.
patent: 2008236010 (2008-10-01), None
Korean Intellectual Property Office “Notice of Submission of Argument” dated Jun. 13, 2011, Application Serial No. 10-2010-0017833 of Yamaha Corporation, 3 pages.

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