Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2006-01-12
2008-08-12
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C345S100000
Reexamination Certificate
active
07411430
ABSTRACT:
An analog output buffer circuit for a flat panel display is provided for improving an output signal distortion. The circuit includes a transistor, a current source, an input capacitor, an upper switch, a lower switch, a first switch, a second switch and a third switch. In which, the transistor and the current source are electrically connected in series between a first power supply and a second power supply. The current source provides a compensatory current for the transistor when a leakage current occurs. The upper switch and the first switch are turned on during the first period, and the lower switch and the second switch are turn on during the second period, in which the second period is after the first period. Those switches eliminate the drawback of different voltage levels between the input signal and the output signal obtained from the output buffer circuit inputted by the input signal.
REFERENCES:
patent: 6243066 (2001-06-01), Murakami et al.
patent: 6876235 (2005-04-01), Li et al.
patent: 7221194 (2007-05-01), Lin et al.
patent: 2004/0178831 (2004-09-01), Li et al.
Chen Bo-Ting
Cheng Huang-Chung
Fang Chun-Hsiang
Tai Ya-Hsiang
Chunghwa Picture Tubes Ltd.
Jianq Chyun IP Office
Wells Kenneth B.
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