Digital to analog converter having single resistive string with

Details Digital to analog converter having single resistive string with Digital to analog converter having single resistive string with

1989-01-17

1990-01-23

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341154, 341135, 323354, H03M 166

Patent

active

048961574

ABSTRACT:
A digital to analog converter comprises a plurality of resistors coupled in series, having first and second nodes at the repsective ends of the plurality of resistors coupled in series and a plurality of nodes, one each between each of the plurality of resistors. A multiplexing circuit is coupled to the first and second nodes and the plurality of nodes, for selecting the voltage on one of the first and second nodes and the plurality of nodes in response to a digital input signal and providing the result as an analog output signal. An input circuit is coupled to the first and second nodes for adjusting the voltage level at both the first and second nodes in response to the digital input signal, wherein the voltage difference between the first and second nodes remains substantially the same and the current through each of the resistors remains substantially the same.

REFERENCES:
patent: 4665381 (1987-05-01), Masuda et al.
patent: 4683458 (1987-07-01), Hallgren
patent: 4810949 (1989-03-01), Schiemenz et al.

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