Electrical system utilizing a concentric collector PNP transisto

Details Electrical system utilizing a concentric collector PNP transisto Electrical system utilizing a concentric collector PNP transisto

1986-06-17

1987-08-04

Salce, Patrick R.

Electricity: power supply or regulation systems

Output level responsive

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

323273, 363 60, 307299B, 357 35, G05F 156

Patent

active

046848770

ABSTRACT:
A concentric collector PNP transistor is utilized in electrical circuits to determine when the voltages of different parts of a circuit are very close to each other. The transistor has an emitter zone, an inner collector zone that surrounds the emitter zone and an outer collector zone that surrounds both the emitter zone and the inner collector zone. When the voltage of the emitter is slightly higher than the voltage of the inner collector a signal is developed at the outer collector which is used as a trigger or control signal. An oscillator-voltage doubler circuit and a series pass voltage regulator circuit are disclosed that utilize the concentric collector transistor.

REFERENCES:
patent: 3710269 (1973-01-01), Fowler et al.
patent: 4071778 (1978-01-01), Nakagomi
patent: 4084174 (1978-04-01), Crippen et al.
patent: 4153909 (1979-05-01), Dobkin
patent: 4319181 (1982-03-01), Wrathall
patent: 4328509 (1982-05-01), Lehning
patent: 4613809 (1986-09-01), Skovmand

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