Gate current source

Details Gate current source Gate current source

1974-01-02

1976-09-21

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

323 4, G05F 308

Patent

active

039821714

ABSTRACT:
A gated current source providing a fast rise time, minimal delay and improved output current tolerance utilizes a non-linear feedback loop between first and second transistors and an appropriate proportioning of resistances coupled to a collector electrode of one of the transistors. The first transistor has its emitter electrode connected to the base electrode of the second transistor and the collector electrode of the second transistor is coupled to the base electrode of the first transistor through a diode. An input pulse is applied to the base electrode of the first transistor through a first resistor and a second resistor having an impedance value relatively low compared with that of the first resistor is connected to the collector electrode of the second transistor. A third transistor, acting as a current sink, has its base electrode connected to the base electrode of the second transistor at which a reference voltage used as a control voltage is produced. A conventional voltage source is suitably coupled to each of the transistors.

REFERENCES:
patent: 3348162 (1967-10-01), Atkins
patent: 3566158 (1971-02-01), Paine et al.
patent: 3681623 (1972-08-01), Hoffman et al.
patent: 3754181 (1973-08-01), Kreitz et al.
Dorler et al., T.sup.2 L Controlled Current Source, IBM Technical Disclosure Bulletin, Vol. 15, No. 4, Sept. 1972, pp. 1102,1103.
Melnyk, Magnet Driver & Pulse-Width Controller, IBM Technical Disclosure Bulletin, Vol. 11, No. 4, Sept. 1968, p. 425.

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