Digital-to-analog converter having improved resistance to variat

Details Digital-to-analog converter having improved resistance to variat Digital-to-analog converter having improved resistance to variat

1996-10-08

1998-03-17

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341154, H03M 166

Patent

active

057292310

ABSTRACT:
A digital-to-analog converter includes a ladder circuit and transistors. A control voltage generating circuit is coupled to the transistors in a feedback configuration to control current flowing through the transistors. The control voltage generating circuit includes an operational amplifier coupled to a transistor. Using the control voltage generating circuit, the digital-to-analog converter of the present invention produces an analog output voltage resistant to variation in the DC forward current gain of the transistors.

REFERENCES:
patent: Re29619 (1978-04-01), Pastoriza

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