Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2007-07-24
2007-07-24
Lam, Tuan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S112000, C326S082000, C326S083000
Reexamination Certificate
active
11108742
ABSTRACT:
A method, which is for determining switching state of a transistor-based switching device that includes a set of transistors, includes the steps of: applying a bias voltage to a transistor having a fastest response so as to dispose the transistors in the set in a desired transistor state; detecting a voltage level at a transistor having a slowest response to the bias voltage; and comparing the detected voltage level with a predetermined threshold voltage level in order to determine the switching state of the switching device. A transistor-based switching device is also disclosed.
REFERENCES:
patent: 4785203 (1988-11-01), Nakamura
patent: 5483188 (1996-01-01), Frodsham
patent: 5825219 (1998-10-01), Tsai
patent: 6720803 (2004-04-01), Pihlstrom
patent: 6873196 (2005-03-01), Humphrey
Chen Shih-Hui
Huang Chun-Yen
Hung Yang-Ping
Liu Jing-Meng
Pai Chung-Lung
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Lam Tuan
Richtek Technology Corp.
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