Digital/analog converter

Details Digital/analog converter Digital/analog converter

1990-07-12

1991-04-16

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 178

Patent

active

050086766

ABSTRACT:
The present invention is a digital/analog converter which converts a digital signal of a binary number consisting of N.sub.L low-order bits and N.sub.U high-order bits into an analog signal, in which a first digital/analog converting circit driven in accordance with a digital data of low-order bits employs, as conventional, an R-2R system while a second digital/analog converting circuit driven in accordance with a digital data of high-order bits employs a 2R system. As a result, the influence of an error included in the variation in an output of the analog signal which is caused by the variation in the digital data for the least significant bit can be decreased, whereby a high resolution is obtained, keeping a monotonicity, without a high matching of registors.

REFERENCES:
patent: 3755807 (1973-08-01), Brown
patent: 4580131 (1986-04-01), Seiler
patent: 4631518 (1986-12-01), Caspell
patent: 4783643 (1988-11-01), Dingwall
patent: 4833473 (1989-05-01), Dingwall
patent: 4843394 (1989-06-01), Linz et al.

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