Current parking return to zero digital-to-analog converter

Details Current parking return to zero digital-to-analog converter Current parking return to zero digital-to-analog converter

2005-05-24

2005-05-24

Le, Don (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S059000, C341S136000

Reexamination Certificate

active

06897799

ABSTRACT:
A digital-to-analog converter having a differential signal path, and a current parking circuit that is independent of the signal path, thereby avoiding a source of imbalance that caused output anomalies in conventional digital-to-analog circuitry. In one embodiment of the invention, a pair of diodes in the current parking circuit are connected through their own independent load resistors to a voltage source. In another embodiment, a single diode is used instead of the pair of diodes, and in a third embodiment the current parking circuit comprises a single load resistor connected to the voltage source, and no diodes at all.

REFERENCES:
patent: 5455836 (1995-10-01), Li et al.
patent: 5739783 (1998-04-01), Tajima

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