PA protection circuit for a single sideband radio

Details PA protection circuit for a single sideband radio PA protection circuit for a single sideband radio

1975-11-17

1977-04-19

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

330134, 330141, 330145, 330207P, 325150, HO3G 320

Patent

active

040191508

ABSTRACT:
A directional power detector mounted between the power amplifier and antenna which supplies audio frequency output signals indicative of forward and reflected power, circuitry for summing and converting the output signals from the power detector means to a DC potential proportional to the magnitude thereof and a transistor connected in shunt at the input of the power amplifier and controlled by the DC potential for controlling the peak envelope power at the antenna.

REFERENCES:
patent: 3020529 (1962-02-01), Turner
patent: 3366883 (1968-01-01), Griffin et al.
patent: 3641451 (1972-02-01), Hollingsworth et al.
patent: 3790896 (1974-02-01), Shimizu et al.
patent: 3852669 (1974-12-01), Bowman et al.
patent: 3870957 (1975-03-01), Straw

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