Power amplifier circuit, doherty amplifier circuit, multistage amplifier circuit, and power amplifier apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorShohei Imai
Life of this patent
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Abstract
A power amplifier circuit includes a first amplifier transistor, a first nonlinear element, and a current control circuit. The first amplifier transistor has a base or a gate into which a first signal is input, a collector or a drain from which a signal resulting from amplification of the first signal is output, and an emitter or a source that is grounded. The first nonlinear element is connected between the collector or the drain of the first amplifier transistor and the base or the gate of the first amplifier transistor. The current control circuit is connected between the ground and the base or the gate of the first amplifier transistor and controls current flowing through the first nonlinear element.
Claims16
A power amplifier circuit comprising:
- a first amplifier transistor having a base or a gate into which a first signal is input, a collector or a drain from which a first amplified signal resulting from amplification of the first signal is output, and an emitter or a source that is grounded;
- a first nonlinear circuit element connected between the collector or the drain of the first amplifier transistor and the base or the gate of the first amplifier transistor;
- and
- a current control circuit connected between ground and the base or the gate of the first amplifier transistor, and configured to control current flowing through the first nonlinear circuit element.
A power amplifier circuit comprising:
- a first amplifier transistor having a base or a gate into which a first signal is input, a collector or a drain from which a first amplified signal resulting from amplification of the first signal is output, and an emitter or a source that is grounded;
- a second amplifier transistor having a base or a gate into which a second signal is input, a collector or a drain from which a second amplified signal resulting from amplification of the second signal is output, and an emitter or a source that is grounded;
- a first nonlinear circuit element connected between the collector or the drain of the second amplifier transistor and the base or the gate of the first amplifier transistor;
- a second nonlinear circuit element connected between the collector or the drain of the first amplifier transistor and the base or the gate of the second amplifier transistor;
- and
- a current control circuit connected between ground and the base or the gate of the first amplifier transistor, and between ground and the base or the gate of the second amplifier transistor, the current control circuit being configured to control current flowing through the first nonlinear circuit element and current flowing through the second nonlinear circuit element,
- wherein the second signal has a different phase than the first signal.
Dependencies are inferred from the claim text.