Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

1989-11-06

1990-09-18

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341152, H03M 166

Patent

active

049581597

ABSTRACT:
A precision ratioed digital-to-analog data converter. A first latch stores a first digital word having a first numerical value and a second latch stores a second digital word having a second numerical value. A down counter alternately receives data from the first and second latches and is connected to a flip flop device to produce a waveform signal having first and second pulse components of opposite polarity. The first and second pulse components have a duration proportional to the first and second digital words. The output waveform is then inverted through an inverter comprising matched P and N channel MOSFETS. The inverted waveform is then presented to an RC integrator circuit which produces a DC signal. The DC signal is passed through a buffer amplifier connected in a voltage follower configuration.

REFERENCES:
patent: 3435196 (1969-03-01), Schmid
patent: 3823396 (1974-07-01), Lode
patent: 4590457 (1986-05-01), Amir
patent: 4837572 (1989-06-01), Gulczynski
patent: 4837573 (1989-06-01), Brooks

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