Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2005-10-25
2005-10-25
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S374000, C327S437000
Reexamination Certificate
active
06958631
ABSTRACT:
A high-speed current switch circuit of this invention has an n-type MOS transistor Q11which switches and outputs a current, and a control circuit11which performs switching control of the MOS transistor Q11. In the control circuit11, a source follower is formed by an N-type MOS transistor Q12and a constant current source I2which is a load on this transistor. A switch SW11is connected to the MOS transistor Q12to perform switching control of a current flowing through the MOS transistor Q12. The control circuit11includes a switch SW12capable of grounding the gate of the MOS transistor11. The source of the MOS transistor Q12is connected to the gate of the MOS transistor Q11. Thus, even if a large current is caused to flow through the output transistor, the output transistor can be made to operate for switching at a high speed.
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Official Letter dated Nov. 8, 2004 of German Patent Office.
Aiba Yusuke
Fujita Takeshi
Hirose Hideaki
Ikeda Masaki
Maruo Akio
Asahi Kasei Microsystems Co. Ltd.
Cunningham Terry D.
Englund Terry L.
Finnegan, Henderson, F arabow, Garrett & Dunner, L.L.P.
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