Amplifiers – With semiconductor amplifying device – Including protection means
Patent
1978-04-13
1979-06-12
Griffin, Robert L.
Amplifiers
With semiconductor amplifying device
Including protection means
325150, 330207P, H03G 320
Patent
active
041581806
ABSTRACT:
A radio transmitter power amplifier is connected to a driver circuit whose drive power determines the output power of the power amplifier. Direct current is supplied to the driver circuit under the control of a temperature control circuit which compares a temperature indicative voltage with a voltage indicative of the direct current drawn by the power amplifier. If the power amplifier direct current is above a desired level for a given temperature, the control circuit reduces the direct current supplied to the driver circuit, and hence reduces the output power of the power amplifier. If the power amplifier direct current is below a desired level for a given temperature, the control circuit increases the direct current supplied to the driver circuit, and hence increases the output power of the power amplifier.
REFERENCES:
patent: 3449680 (1969-06-01), Schilb
patent: 3641451 (1972-02-01), Hollingsworth et al.
patent: 3866136 (1975-02-01), Augustin et al.
patent: 4019150 (1977-04-01), Lurey et al.
patent: 4041396 (1977-08-01), Fedde
patent: 4122400 (1978-10-01), Medendorp et al.
General Electric Company
Griffin Robert L.
Ng Jin F.
Williams James J.
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