Amplifier protection circuit

Details Amplifier protection circuit Amplifier protection circuit

1977-04-25

1978-10-24

Mullins, James B.

Amplifiers

Miscellaneous

Amplifier protection means

325150, 330298, H03G 320

Patent

active

041224000

ABSTRACT:
A protection circuit for a transmitter amplifier is provided in which separate VSWR (reflected power) control and separate temperature control is provided when the thresholds of either or both are exceeded. When the temperature of the RF amplifier is sensed and when this temperature exceeds a certain threshold level, the output level of the RF amplifier is adjusted to protect the amplifier. Separately, there is provided a means for sensing the ratio of the reflected power to the forward power and when this ratio exceeds a given threshold, the gain of the amplifier is cut back to thereby protect.

REFERENCES:
patent: 3366883 (1968-01-01), Griffin et al.
patent: 3866136 (1975-02-01), Augustin et al.
patent: 4019150 (1977-04-01), Lurey et al.

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