Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2008-04-08
2009-08-25
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C327S312000, C327S537000
Reexamination Certificate
active
07579893
ABSTRACT:
An NchMOS transistor (1) is provided for muting of an output terminal (10) to which positive and negative output signals are outputted, and a mute switch circuit (3) is provided for controlling on/off of the transistor (1) by switching a voltage applied to the gate of the transistor (1). When muting is turned off, the back gate of the transistor (1) is biased by resistance division between resistors (R1and R2) connected in series between the output terminal (10) and a predetermined negative potential (VSS).
REFERENCES:
patent: 5300892 (1994-04-01), Hirai
patent: 6734746 (2004-05-01), Nogi
patent: 7372325 (2008-05-01), Shimomura et al.
patent: 2007/0009110 (2007-01-01), Kakumoto et al.
patent: 2002-111446 (2002-04-01), None
patent: 2002271217 (2002-09-01), None
patent: 2004-320490 (2004-11-01), None
Shimomura Kazuhiro
Yamamoto Makoto
Nguyen Long
Panasonic Corporation
Steptoe & Johnson LLP
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