Amplifier protection circuit

Amplifiers – With semiconductor amplifying device – Including protection means

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Details

330207P, 455117, H02H 720

Patent

active

043530370

ABSTRACT:
A protection circuit for a transmitter amplifier which provides power leveling and controls transmitter output power as a function of the ratio of reflected power to forward power. The circuit senses forward power level and develops a first voltage which is compared with the reference voltage to provide a control voltage which controls the power developed by the transmitter amplifier. Reflected power is sensed and a second voltage is developed which is compared to a portion of the first voltage and causes a reduction in the reference voltage when the reflected power to forward power ratio exceeds a predetermined level.

REFERENCES:
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patent: 3652898 (1972-03-01), Steeves
patent: 3852669 (1974-12-01), Bowman et al.
patent: 3870957 (1975-03-01), Straw
patent: 4019150 (1977-04-01), Lurey et al.
patent: 4114108 (1978-09-01), Falkenberry et al.
patent: 4122400 (1978-10-01), Medendorp et al.

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