Digital-to-analogue converter

Details Digital-to-analogue converter Digital-to-analogue converter

2005-10-21

2009-11-17

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

07619553

ABSTRACT:
A digital-to-analogue conversion arrangement is disclosed which includes first and second groups of the same number of bi-directional bufferless digital-to-analogue converters. The output of at least one converter in each group is connected to a respective capacitive load (CLOAD, CLOAD′). During a calibration phase of operation the converter inputs receive first and second different codes representing the same output level. The arrangement also includes a respective switched capacitor network connected to each converter output, a comparator for comparing the output voltages of the first and second groups, and a control circuit. The control circuit controls the capacitor networks in response to the comparator so as to make the output voltages of the first and second groups substantially equal.

REFERENCES:
patent: 4611195 (1986-09-01), Shosaku
patent: 7061418 (2006-06-01), Zebedee
patent: 2409777 (2005-07-01), None
International Search Report (PCT/ISA/210) and (PCT/ISA/220), 2005.

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