Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1993-06-09
1995-04-04
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327 73, 327379, 327390, H03K 1760, H03K 326
Patent
active
054040531
ABSTRACT:
An improved circuit for controlling the maximum current in a MOS power transistor, in which resistor is in series with the drain-source path of the MOS power transistor. The supply terminal of a transconductance operational amplifier is connected to the output of a voltage-raising or charge pump circuit which can output a voltage higher than that of the voltage supply to which the drain of the MOS transistor is connected. The inputs of the amplifier are connected to the resistor and its output is connected to the gate of the MOS transistor so that, in operation, the maximum current flowing through the power transistor is limited to a value proportional to a reference voltage.
REFERENCES:
patent: 4514648 (1985-04-01), Dotson et al.
patent: 4654545 (1987-03-01), Giordano
patent: 5017816 (1991-05-01), Wilcox
patent: 5023474 (1991-06-01), Wilcox
patent: 5055719 (1991-10-01), Hughes
patent: 5245526 (1993-09-01), Balakrishnan et al.
Patent Abstracts of Japan, vol. 13, No. 264, 19 Jun. 1989.
Morelli Marco
Poletto Vanni
Poma Alberto
Callahan Timothy P.
Groover Robert
Nu Ton My-Trang
SGS-Thomson Microelectronics S.R.L.
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