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US 11,381,204 B2Granted
Power amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsHisanori Namie, Mitsunori Samata, Satoshi Tanaka
Life of this patent
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Abstract
A power amplifier circuit includes a first amplifier that amplifies a first signal, and a second amplifier arranged subsequent to the first amplifier. The second amplifier amplifies a second signal that is based on an output signal of the first amplifier. The first amplifier performs class inverse-F operation, and the second amplifier performs class F operation.
Claims12
A power amplifier circuit comprising:
- a first amplifier configured to amplify a first signal;
- a second amplifier configured to amplify a second signal based on an output signal of the first amplifier, the second amplifier being arranged subsequent to the first amplifier;
- and
- a parallel resonant circuit connected in series between an output end of the first amplifier and an input end of the second amplifier,
- wherein the first amplifier is configured to amplify the first signal according to a class inverse-F operation, and the second amplifier is configured to amplify the second signal according to a class F operation, and
- wherein a first power supply voltage is supplied to the first amplifier via the parallel resonant circuit.
3 more elements
A power amplifier circuit comprising:
- a first amplifier configured to amplify a first signal;
- and
- a second amplifier configured to amplify a second signal based on an output signal of the first amplifier, the second amplifier being arranged subsequent to the first amplifier,
- a parallel resonant circuit connected in series between an output of the first amplifier and an input of the second amplifier;
- and
- a series resonant circuit connected between an output of the second amplifier and ground,
- wherein the first amplifier is configured to amplify the first signal according to a class inverse-F operation, and the second amplifier is configured to amplify the second signal according to a class F operation,
- wherein the parallel resonant circuit is configured to generate an open circuit for an even-order harmonic of a fundamental frequency of the output signal of the first amplifier, and
- wherein the series resonant circuit is configured to generate a short circuit to ground for an even-order harmonic of a fundamental frequency of an output signal of the second amplifier.
6 more elements
A power amplifier circuit comprising:
- a first amplifier configured to amplify a first signal;
- and
- a second amplifier configured to amplify a second signal based on an output signal of the first amplifier, the second amplifier being arranged subsequent to the first amplifier,
- wherein the first amplifier is configured to amplify the first signal according to a class inverse-F operation, and the second amplifier is configured to amplify the second signal according to a class F operation, and
- wherein the second amplifier comprises:
- a lower transistor having a first terminal to which a second power supply voltage is supplied, a second terminal that is grounded, and a third terminal to which the second signal is supplied;
- a second capacitor;
- an upper transistor having a first terminal to which a third power supply voltage is supplied and from which an output signal of the second amplifier is output, a second terminal connected to the first terminal of the lower transistor via the second capacitor, and a third terminal to which a driving voltage is supplied;
- a second inductor that connects the second terminal of the upper transistor to ground;
- and
- an adjustment circuit configured to adjust the driving voltage.
8 more elements
Dependencies are inferred from the claim text.