High voltage current source circuit and method

Details High voltage current source circuit and method High voltage current source circuit and method

1985-11-27

1987-04-21

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323270, 307302, 307303, 357 20, 357 35, G05F 308

Patent

active

046599797

ABSTRACT:
A high voltage constant current source circuit includes first transistor biased as a constant current source and a second transistor connected in series with the first transistor. The second transistor has a punch-through voltage that is substantially less than any breakdown voltage of the second transistor. The emitter of the second transistor is connected to the collector of the first transistor. The collector of the second transistor supplies the constant current, provides an increased high output impedance, and allows low voltage operation if the collector-to-emitter voltage of the second transistor is less than its punch-through voltage. If its punch-through voltage is exceeded, that punch-through voltage adds to the collector-to-emitter breakdown voltage of the first transistor, allowing high voltage operation.

REFERENCES:
patent: 3160807 (1964-12-01), Packard
patent: 3858062 (1974-12-01), Davis
patent: 3996498 (1976-12-01), Schade, Jr.
patent: 4306185 (1981-12-01), Leuschner

Affiliated with

Also associated with

Rating

High voltage current source circuit and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High voltage current source circuit and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High voltage current source circuit and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-754407