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US 12,051,998 B2Granted
Amplifier circuit
AssigneeSumitomo Electric Industries, Ltd.
InventorTatsuya Hashinaga
Life of this patent
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Abstract
An amplifier circuit includes a first amplifier that amplifies a high frequency signal, and a load circuit that changes a load impedance of the first amplifier without being controlled by an external circuit so that a saturation power at a first temperature is higher than a saturation power at a second temperature lower than the first temperature, and an efficiency at the first temperature is lower than an efficiency at the second temperature.
Claims9
An amplifier circuit comprising:
- a first amplifier that amplifies a high frequency signal;
- and
- a load circuit that changes a load impedance of the first amplifier without being controlled by an external circuit so that a saturation power at a first temperature is higher than a saturation power at a second temperature lower than the first temperature, and an efficiency at the first temperature is lower than an efficiency at the second temperature, and
- wherein the load circuit includes a reactance element, and a resistance element having a first resistance value at the first temperature and a second resistance value at the second temperature different from each other.
1 more element
Dependencies are inferred from the claim text.