Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1993-11-24
1995-04-11
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327 65, 327208, 327530, H03F 345, H03F 316
Patent
active
054061350
ABSTRACT:
A differential current source circuit includes three P-channel MOSFETs and two N-channel MOSFETs. Each source of first and second P-channel MOSFETs is connected to a power supply, and a bias voltage is applied to each gate of the MOSFETs. A current path of the first N-channel MOSFET is connected between a drain of the first P-channel MOSFET and a ground. A current path of the third P-channel MOSFET is connected between a drain of the second P-channel MOSFET and a current output terminal. A gate of the third P-channel MOSFET is connected to the drain of the first P-channel MOSFET. One end of a current path of the second N-channel MOSFET is connected to a connecting point of the first P-channel and first N-channel MOSFETs, and the other end is connected to a connecting point of the second P-channel and third P-channel MOSFETs. A digital signal is applied to a gate of the second N-channel MOSFET.
REFERENCES:
patent: 4027294 (1977-05-01), Meusburger et al.
patent: 4104733 (1978-08-01), Satoh
patent: 4125878 (1978-11-01), Watanabe
patent: 4149099 (1979-04-01), Nasami
patent: 4572977 (1986-02-01), Takemae et al.
patent: 4831282 (1989-05-01), Colles
patent: B14831282 (1992-09-01), Colles
patent: 5065045 (1991-11-01), Mok
Fujii Shinji
Kasai Kazuhiko
Matsuo Kenji
Noine Yasukazu
Callahan Timothy P.
Englund Terry L.
Kabushiki Kaisha Toshiba
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