Series-connected microwave power amplifiers with voltage feedbac

Details Series-connected microwave power amplifiers with voltage feedbac Series-connected microwave power amplifiers with voltage feedbac

1998-02-05

1999-08-31

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

330294, H03F 304

Patent

active

059458798

ABSTRACT:
A microwave power amplifier is comprised of a plurality of series connected amplifier stages. Each stage is provided with a local negative feedback. The addition of the local voltage feedback distribution networks provide correct voltage distribution and equal current distribution for all transistors, such that the peak-to-peak voltage and current swings of each transistor can be set simultaneously to the values required for efficient amplifier operation. The method applies to both FETs and bipolar transistors. The series connected microwave power amplifier is thus characterized as a stack with local voltage feedback networks which provide an equal distribution of voltage across the transistors in the stack. The amplifier stages can be biased and tuned to collectively operate either as a class A or B amplifier.

REFERENCES:
patent: 2594449 (1952-04-01), Kircher
patent: 4075576 (1978-02-01), Eden
patent: 4232272 (1980-11-01), Fabri
patent: 5032799 (1991-07-01), Milberger et al.
patent: 5408198 (1995-04-01), Kusunoki

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