Source drive amplifier of a liquid crystal display
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United States of America Patent
Stats
-
May 4, 2004
Grant Date -
Mar 20, 2003
app pub date -
Jun 28, 2001
filing date -
Apr 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A source drive amplifier has a first input circuit controlled by a polarity switching signal for being switched into an NMOS differential amplifying circuit or a bias circuit, and a second input circuit controlled by a polarity switching signal for being switched into a bias circuit or a PMOS differential amplifying circuit. The output of the first input circuit switched into an NMOS differential amplifying circuit drives the PMOS transistor of an output transistor pair for being used as a source out amplifying output stage, and a current provided by the NMOS transistor is used as a bias. The output of the second output circuit switched into a PMOS differential amplifying circuit drives the NMOS transistor of the output transistor pair for being used as a sink in amplifying output stage, and a current provided by the PMOS transistor is used as a bias.
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