POWER AMPLIFIER MODULE
First Claim
1. A power amplifier module comprising:
- a first amplifier supplied with a power supply voltage and configured to amplify a first signal;
a second amplifier configured to amplify a second signal based on an output signal from the first amplifier;
a first bias circuit configured to supply a bias current to the first amplifier based on a bias drive signal, the bias current being supplied via a current path; and
an adjusting circuit comprising;
an adjusting transistor having first, second, and third terminals, wherein a first voltage based on the power supply voltage is supplied to the first terminal, a second voltage based on the bias drive signal is supplied to the second terminal, and the third terminal is connected to the current path,wherein the adjusting circuit is configured to adjust the bias current based on the power supply voltage supplied to the first amplifier.
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Accused Products
Abstract
A power amplifier module includes first and second amplifiers, a first bias circuit, and an adjusting circuit. The first amplifier amplifies a first signal. The second amplifier amplifies a second signal based on an output signal from the first amplifier. The first bias circuit supplies a bias current to the first amplifier via a current path on the basis of a bias drive signal. The adjusting circuit includes an adjusting transistor having first, second, and third terminals. A first voltage based on a power supply voltage is supplied to the first terminal. A second voltage based on the bias drive signal is supplied to the second terminal. The third terminal is connected to the current path. The adjusting circuit adjusts the bias current on the basis of the power supply voltage supplied to the first amplifier.
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Citations
6 Claims
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1. A power amplifier module comprising:
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a first amplifier supplied with a power supply voltage and configured to amplify a first signal; a second amplifier configured to amplify a second signal based on an output signal from the first amplifier; a first bias circuit configured to supply a bias current to the first amplifier based on a bias drive signal, the bias current being supplied via a current path; and an adjusting circuit comprising; an adjusting transistor having first, second, and third terminals, wherein a first voltage based on the power supply voltage is supplied to the first terminal, a second voltage based on the bias drive signal is supplied to the second terminal, and the third terminal is connected to the current path, wherein the adjusting circuit is configured to adjust the bias current based on the power supply voltage supplied to the first amplifier. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification