Controlled current source for accelerated switching

Details Controlled current source for accelerated switching Controlled current source for accelerated switching

1999-08-18

2000-11-21

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323275, G05F 1565, G05F 320

Patent

active

061508063

ABSTRACT:
A controlled current source is disclosed which receives a control signal and supplies a current at an output. The current source includes a power module having a plurality of parallel-arranged power transistors, whose collectors are jointly connected to the output of the current source, a control module to receive the control signal, and an output to supply a signal enabling the power transistors to be turned on, wherein, the emitters of the power transistors are jointly connected to the output of the control module, the output for supplying a current whose value depends on the value of the control signal, the bases of the power transistors being permanently subjected to a voltage of a predetermined value enabling the power transistors to be rendered potentially conducting. By pre-charging the parasitic capacitances of the power transistors, the transistors are turned on at an accelerated rate.

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IBM Technical Disclosure Bulletin, vol. 16, No. 6, Nov. 1973; entitled "Current Sources For a Phase-Locked Loop", D.J. Malone.

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