Digital-to-analog converter

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

1993-06-02

1994-08-30

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341136, H03M 182

Patent

active

053431979

ABSTRACT:
A pair of equilibrium output signals P(+) and P(-) from a 1-bit D/A converter IC, which is made up of an oversampling filter, noise shaper and a pulse converter, are supplied to a pair of field effect transistors connected in a common drain configuration. A constant current I.sub.0 is supplied to the common drain from a constant current source and at least one of the source output currents is converted by an output circuit into a voltage. In this manner, a 1-bit D/A converted output signal freed of fluctuations of the power source is provided at an output terminal.

REFERENCES:
patent: 4408094 (1983-10-01), Oura
patent: 4542371 (1985-09-01), Uchikoshi
patent: 4929947 (1990-05-01), Toyama
patent: 5021788 (1991-06-01), Ueki et al.
patent: 5023614 (1991-06-01), Fung et al.
patent: 5023615 (1991-06-01), Yamada et al.
patent: 5148168 (1992-09-01), Masuda et al.
patent: 5164725 (1992-11-01), Long

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