Microwave VCO having reduced supply voltage

Details Microwave VCO having reduced supply voltage Microwave VCO having reduced supply voltage

1996-07-25

1998-03-31

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330305, 331108B, H03F 345, H03B 502

Patent

active

057342997

ABSTRACT:
A transconductance amplifier for use in a low noise, microwave voltage controlled oscillator. The transconductance amplifier incorporates a linear amplifier having ratioed transistors to provide linearized gain. A tuning arrangement combines in-phase and out of phase currents in an inverse ratio to provide a constant D.C. current sum. The tuning circuit has been arranged to operate without a cascode stage such that the power supply voltage requirement is reduced from 5.0 volts to 3.3 volts.

REFERENCES:
patent: 4804904 (1989-02-01), Katakura
patent: 5172076 (1992-12-01), Brown
patent: 5185581 (1993-02-01), Brown
patent: 5371475 (1994-12-01), Brown
patent: 5420538 (1995-05-01), Brown
patent: 5463349 (1995-10-01), Petersen et al.
patent: 5465072 (1995-11-01), Atarodi
patent: 5483195 (1996-01-01), Brown

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