Apparatus and methods for biasing of power amplifiers
First Claim
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1. A mobile device comprising:
- a transceiver configured to generate a radio frequency signal and a power amplifier enable signal;
a power amplifier configured to provide amplification to the radio frequency signal, the power amplifier configured to receive a bias signal that biases the power amplifier; and
a bias circuit configured to receive the power amplifier enable signal and to generate the bias signal, the bias circuit including a gain correction circuit configured to generate a control current in response to activation of the power amplifier enable signal and to mirror the control current to generate a correction current, and a primary biasing circuit configured to generate the bias signal based on the correction current and the power amplifier enable signal.
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Abstract
Apparatus and methods for biasing of power amplifiers are disclosed. In one embodiment, a mobile device includes a transceiver that generates a radio frequency signal and a power amplifier enable signal, a power amplifier that provides amplification to the radio frequency signal and that is biased by a bias signal, and a bias circuit that receives the power amplifier enable signal and generates the bias signal. The bias circuit includes a gain correction circuit that generates a correction current in response to activation of the power amplifier enable signal, and a primary biasing circuit that generates the bias signal based on the correction current and the power amplifier enable signal.
40 Citations
20 Claims
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1. A mobile device comprising:
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a transceiver configured to generate a radio frequency signal and a power amplifier enable signal; a power amplifier configured to provide amplification to the radio frequency signal, the power amplifier configured to receive a bias signal that biases the power amplifier; and a bias circuit configured to receive the power amplifier enable signal and to generate the bias signal, the bias circuit including a gain correction circuit configured to generate a control current in response to activation of the power amplifier enable signal and to mirror the control current to generate a correction current, and a primary biasing circuit configured to generate the bias signal based on the correction current and the power amplifier enable signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of power amplifier biasing, the method comprising:
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generating a radio frequency signal and a power amplifier enable signal using a transceiver; providing amplification to the radio frequency signal using a power amplifier; generating a control current in response to activation of the power amplifier enable signal using a gain correction circuit; mirroring the control current to generate a correction current using the gain correction circuit; generating a bias signal based on the correction current and the power amplifier enable signal using a primary biasing circuit; and biasing the power amplifier using the bias signal. - View Dependent Claims (10, 11, 12, 13)
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14. A packaged module comprising:
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a package substrate; and an integrated circuit attached to the package substrate and including a power amplifier configured to provide amplification to a radio frequency signal and a bias circuit configured to receive a power amplifier enable signal and to generate a bias signal that biases the power amplifier, the bias circuit including a gain correction circuit configured to generate a control current in response to activation of the power amplifier enable signal and to mirror the control current to generate a correction current, and a primary biasing circuit configured to generate the bias signal based on the correction current and the power amplifier enable signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification