Decoder circuit, driving circuit for display apparatus and...

Details Decoder circuit, driving circuit for display apparatus and... Decoder circuit, driving circuit for display apparatus and...

2007-09-07

2009-06-23

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S118000

Reexamination Certificate

active

07551111

ABSTRACT:
A decoder circuit configured to output an analog voltage signal according to input digital data includes an operational amplifier, first selection circuit and compensation unit. The operational amplifier includes a plurality of input differential pairs and generates an output voltage by interpolating input voltages applied to the plurality of input differential pairs. The first selection circuit selects the input voltages applied to the plurality of input differential pairs from reference voltages according to the digital data. The compensation unit suppresses a fluctuation in a transient variation characteristic of the input voltages applied to the plurality of input differential pairs depending on a selection of the input voltages by the first selection circuit in case at least one voltage level among the reference voltages is changed.

REFERENCES:
patent: 6617989 (2003-09-01), Deak
patent: 6639534 (2003-10-01), Khoini-Poorfard et al.
patent: 6853323 (2005-02-01), Chen et al.
patent: 2002-043944 (2002-02-01), None

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