D/A converter

Details D/A converter D/A converter

2011-07-12

2011-07-12

Wang, Quan-Zhen (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S089000, C345S094000

Reexamination Certificate

active

07978168

ABSTRACT:
A D/A converter for receiving a plurality of divisional voltages and converting a digital signal to an analog voltage with the divisional voltages, the D/A converter includes a selection circuit for receiving the divisional voltages and the digital signal to select one of the divisional voltages. The selection circuit includes a plurality of first switch circuits that are selectively activated in response to the digital signal to select one of the divisional voltages, with each of the first switch circuits being provided with a logic switch function and having an ON resistance when activated, and at least an activated one of the first switch circuits further dividing the selected one of the divisional voltages with the ON resistance. The plurality of switch circuits includes at least one voltage dividing switch circuit used to further divide the selected one of the divisional voltages.

REFERENCES:
patent: 2001/0028336 (2001-10-01), Yamagata et al.
patent: 2002/0008686 (2002-01-01), Kumada et al.
patent: 2003/0034947 (2003-02-01), Tanaka et al.
patent: 2005/0225573 (2005-10-01), Kudo et al.
patent: 62-24713 (1987-02-01), None
patent: 9-138670 (1997-05-01), None
patent: 9-258695 (1997-10-01), None
patent: 2001-290123 (2001-10-01), None

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