Resistive string type digital-to-analog converting unit

Details Resistive string type digital-to-analog converting unit Resistive string type digital-to-analog converting unit

1991-02-08

1992-03-03

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341154, H03M 178

Patent

active

050936611

ABSTRACT:
A digital-to-analog converting unit fabricated on a single semiconductor chip comprises a string of resistive elements coupled between a source of power voltage level and a source of ground voltage level and an array of switching elements respectively associated with intermediate nodes each provided between every adjacent two resistive elements, and each of the switching elements is implemented by a parallel combination of an n-channel type component field effect transistor and a p-channel type component field effect transistor even if one of the component field effect transistors of the switching elements near the voltage sources remains off at all times, because the parallel combinations enhances uniformity of pattern on the semiconductor chip, thereby preventing the string of the resistive elements from irregularity of sheet resistance.

REFERENCES:
patent: 4352092 (1982-09-01), Masuda et al.
patent: 4713649 (1987-12-01), Hino
patent: 4800365 (1989-01-01), White et al.
patent: 4942397 (1990-07-01), Real

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