RF power amplifier with linearity control
First Claim
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1. A single chip amplifier circuit comprising:
- a single chip consisting of;
a multi-stage power amplifier configured to amplify an input signal to produce an output signal;
a sensing circuit configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and
a linearity control circuit configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal.
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Abstract
A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.
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Citations
23 Claims
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1. A single chip amplifier circuit comprising:
a single chip consisting of; a multi-stage power amplifier configured to amplify an input signal to produce an output signal; a sensing circuit configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and a linearity control circuit configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless communication device having a base band processor coupled to a single chip amplifier circuit comprising:
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the single chip amplifier circuit consisting of; a multi-stage power amplifier configured to amplify an input signal to produce an output signal; a sensing circuit coupled to the base band processor and configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and the base band processor configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal.
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21. A wireless communication device having a radio frequency (RF) transceiver coupled to a single chip amplifier circuit comprising:
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the single chip amplifier circuit consisting of; a multi-stage power amplifier configured to amplify an input signal to produce an output signal; a sensing circuit coupled to the RF transceiver and configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and the RF transceiver configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal.
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22. A single chip amplifier circuit comprising:
a single chip consisting of; a first matching circuit connected to the input of a multi-stage power amplifier, the first matching circuit configured to send the input signal to the multi-stage power amplifier; the multi-stage power amplifier configured to amplify an input signal to produce an output signal; a second matching circuit configured to receive the output signal from the output of the multi-stage amplifier before the output signal is output by the linear amplifier circuit, wherein a linearity control circuit is configured to receive the output signal from the output of the second matching circuit; a sensing circuit configured to detect phase, gain and adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and the linearity control circuit configured to control the multi-stage power amplifier to control phase and gain and reduce ACL in the output signal in response to the sensing signal.
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23. A self-controlled single chip amplifier circuit comprising:
a single chip consisting of; a multi-stage power amplifier configured to amplify an input signal to produce an output signal; a sensing circuit configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; and a linearity control circuit configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal.
Specification