Digital-to-analog conversion circuit

Details Digital-to-analog conversion circuit Digital-to-analog conversion circuit

1997-07-02

1999-08-10

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 166

Patent

active

059365633

ABSTRACT:
A current output digital-to-analog conversion circuit for converting a digital signal to an analog signal by supplying a current through an output resistor includes a variable resistance circuit for varying an output resistance in response to an external control signal and a current supplying portion for adjusting a current in response to a gate voltage. The resistance of the resistor in the variable resistance circuit is changed by an external control signal, the current of the current supplying portion is changed by changing the gate voltage, whereby the output current can be changed while keeping an output voltage amplitude constant, and the output voltage amplitude can be changed while keeping the output current constant.

REFERENCES:
patent: 5218364 (1993-06-01), Kumazawa et al.

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