D/A converter

Details D/A converter D/A converter

2007-08-14

2007-08-14

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S135000

Reexamination Certificate

active

11406269

ABSTRACT:
A high accuracy D/A converter includes D/A converter sections including 64 current cells for outputting a current corresponding to 1 LSB of 8-bit input data and a D/A converter section including 63 current cells, a reference current generating section for supplying the respective D/A converter sections with reference currents, and a decoder for activating each of the current cells from the D/A converter sections to the D/A converter section in the stated order in a cyclic manner when the 8-bit input data value is increased, and deactivating one each of the activated current cells from the D/A converter section to the D/A converter section in the stated order in a cyclic manner when the 8-bit input data value is decreased.

REFERENCES:
patent: 5703587 (1997-12-01), Clark et al.
patent: 5838271 (1998-11-01), Park
patent: 6052074 (2000-04-01), Iida
patent: 6498575 (2002-12-01), Matsusaka
patent: 2005/0073486 (2005-04-01), Maede et al.
J. Bastos et al., “A 12-Bit Intrinsic Accuracy High-Speed CMOS DAC”,IEEE Journal of Solid-State Circuits, vol. 33, No. 12, Dec. 1998, pp. 1959-1969.
H. Takakura et al., “A 10 Bit 80MHz Glitchless CMOS D/A Converter”,IEEE 1991 Custom Integrated Circuits Conference, pp. 26.5.1-26.5.4, month unknown.

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