Digital to analog convertor having a DC offset cancelling...

Details Digital to analog convertor having a DC offset cancelling... Digital to analog convertor having a DC offset cancelling...

1999-03-22

2001-03-20

Jeanpierre, Peguy (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S144000

Reexamination Certificate

active

06204783

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to a digital to analog converter having a device for canceling DC offset resulting from digital to analog conversion, and a method thereof, based on a comparison between a digital input signal and an analog output signal.
BACKGROUND OF THE INVENTION
A digital to analog converter (i.e. —DAC) converts digital signals to analog signals. An analog output signal is comprised of two signals—the first signal is proportional to the digital input signal, and the second signal is an erroneous Direct Current (DC) offset (i.e.—offset). The offset varies when the temperature of the digital to analog converter varies, thus there is a need to compensate the offset constantly.
There is a need to compensate the DC offset in an efficient and fast manner.


REFERENCES:
patent: 5877645 (1999-03-01), Comino et al.

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