Resistor-string digital/analog converter circuit and...

Details Resistor-string digital/analog converter circuit and... Resistor-string digital/analog converter circuit and...

2006-09-05

2008-09-09

Williams, Howard (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S136000

Reexamination Certificate

active

07423571

ABSTRACT:
A resistor-string digital/analog converter circuit includes a plurality of resistors configured to divide a predetermined voltage, a plurality of MOS transistors configured to divide a voltage generated across one resistor of the plurality of resistors, a control circuit configured to control a connection between the one resistor and the plurality of MOS transistors so as to supply to the plurality of MOS transistors the voltage generated across the one resistor, and a gate potential generating circuit. The gate potential generating circuit generates a plurality of mutually different gate potentials and supplies the plurality of generated gate voltages, respectively, to a plurality of gates of the plurality of MOS transistors, so that the resistance values of MOS resistance of the plurality of MOS transistors are equal to each other.

REFERENCES:
patent: 5943000 (1999-08-01), Nessi et al.
patent: 6204785 (2001-03-01), Fattaruso et al.
patent: 6570520 (2003-05-01), Ishii

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