Digital to analog converter

Details Digital to analog converter Digital to analog converter

1992-04-29

1993-01-19

Logan, Sharon D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341145, 341148, H03M 166, H03M 176

Patent

active

051810344

ABSTRACT:
Signal sources are arranged in a matrix form and provide preset analog values. Switching means are connected between signal sources and an analog output terminal having connection paths to the respective signal sources. Latch circuits are respectively provided for switch control circuits for controlling the switching means. Each of the latch circuits latches a control signal from a corresponding one of the switch control circuits and outputs the control signal in response to a preset synchronizing signal to a corresponding one of the switching means. The switching means are simultaneously controlled by output signals of decoders so that a desired analog output is permitted to be derived from the output terminal. The period of the clock signal can be shorten and a switching operation causing variation exceeding a desired variation occurring when the digital signal is changed can be prevented.

REFERENCES:
patent: 4352092 (1982-09-01), Masuda et al.
patent: 4873525 (1989-10-01), Iida
patent: 4875046 (1989-10-01), Lewyn
patent: 4973979 (1990-11-01), Ikeda
T. Miki et al., "An 80-MHz 8-bit CMOS D/A Converter", IEEE J. Solid-State Circuits, vol. SC-21, No. 6., pp. 983-988, Dec. 6, 1988.
H. Takakura et al., "A 10 bit 80 MHz Glitchless CMOS D/A Converter", CICC Digest Technical Papers, pp. 26.5.1-26.5.4, 1991.

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