Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2008-07-22
2008-07-22
Mai, Lam T (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S144000
Reexamination Certificate
active
11711747
ABSTRACT:
A decoder circuit that selects a grayscale voltage responsive to digital input includes a first transistor circuit that selects grayscale voltages greater than a certain voltage and a second transistor circuit that selects grayscale voltages less than the certain voltage. The two transistor circuits are formed in separate substrates, one substrate being a well formed in the other substrate, or both substrates being wells formed in a third substrate. The substrate of the first transistor circuit is biased at a higher potential than the substrate of the second transistor circuit. This biasing scheme enables all selected grayscale voltages to propagate quickly through the decoder circuit.
REFERENCES:
patent: 6417827 (2002-07-01), Nagao et al.
patent: 6864869 (2005-03-01), Udo et al.
patent: 7126518 (2006-10-01), Tsuchi
patent: 7161517 (2007-01-01), Yen et al.
patent: 7327299 (2008-02-01), Yen et al.
patent: 2000-183747 (2000-06-01), None
Mai Lam T
Oki Electric Industry Co. Ltd.
Volentine & Whitt PLLC
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