Circuit for providing a base operating voltage for a bipolar...

Details Circuit for providing a base operating voltage for a bipolar... Circuit for providing a base operating voltage for a bipolar...

2007-03-13

2007-03-13

Shingleton, Michael B (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S296000, C330S297000, C330S289000, C330S310000, C327S306000

Reexamination Certificate

active

11032693

ABSTRACT:
A circuit for providing a base operating voltage for a bipolar transistor includes a UBEmultiplier providing, in response to a working-point control current, a working voltage fed to a circuit for reducing the working voltage in order to generate a base operating voltage smaller than a base-emitter voltage drop of a bipolar power transistor. With this, the bipolar power transistor may be maintained in the class C operation in a flexible and robust manner, so that an amplifier with high efficiency is obtained.

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Millman “Micro-electronics”McGraw-Hill copyright 1979 p. 69.
Riedl, A., “PA-300”, Elektor Elektronic Journal, No. 11, XP-002258125, Nov. 1995, pp. 20-27, (8 pages).

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