Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2005-11-22
2005-11-22
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C333S08100R
Reexamination Certificate
active
06967517
ABSTRACT:
The present invention provides a switching device comprising first to third connection terminals, a first FET provided with a pair of terminals one of which is connected, via a first direct-current blocking capacitive element, to the first connection terminal and the other of which is connected, via another first direct-current blocking capacitive element, to the second connection terminal, and a second FET provided with a pair of terminals one of which is connected, via a second direct-current blocking capacitive element, to the first connection terminal and the other of which is connected, via another second direct-current blocking capacitive element, to the third connection terminal. The channel type of the first FET is the same as the channel type of the second FET. A first bias voltage is applied to a gate of the first FET, and a second bias voltage is applied to both the main terminals of the second FET. In addition, either a voltage having a first given value or a voltage having a second given value is applied, as a first control value, to both the main terminals of the first FET and to a gate of the second FET, thereby establishing switching between a first connection state of electrically connecting the first connection terminal and the second connection terminal with each other and a second connection state of electrically connecting the first connection terminal and the third connection terminal with each other.
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Lam Tuan T.
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
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