Protection circuit for RF power amplifiers

Details Protection circuit for RF power amplifiers Protection circuit for RF power amplifiers

1987-04-24

1988-02-23

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including protection means

330207P, 455117, H02H 720

Patent

active

047273372

ABSTRACT:
An improved power controller and protection circuit to regulate the RF output power of a radio transmitter and to protect its RF amplifier from overload damage. The controller features a floating input, voltage controlled current source with high common-mode rejection to provide feedback of the DC input current drawn by the RF power amplifier. The controller can use an arbitrary reference voltage, which allows its application universally with power amplifiers designed for different rated output powers and frequency ranges.

REFERENCES:
patent: 3641451 (1972-02-01), Hollingsworth et al.
patent: 3866136 (1975-02-01), Augustin et al.
patent: 4313210 (1982-01-01), Hume et al.
patent: 4547746 (1985-10-01), Erickson et al.
patent: 4626767 (1986-12-01), Clappier et al.

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