Radio frequency front-end circuit
First Claim
1. A radio frequency (RF) front-end circuit comprising:
- a power management circuit configured to;
output a first modulated voltage via a first voltage port;
output a second modulated voltage via a second voltage port;
output a first bias voltage via a first bias voltage port; and
output a second bias voltage via a second bias voltage port;
an amplifier circuit coupled to a selected voltage port among the first voltage port and the second voltage port and a selected bias voltage port among the first bias voltage port and the second bias voltage port, the amplifier circuit configured to;
receive a selected modulated voltage and a selected bias voltage from the selected voltage port and the selected bias voltage port, respectively; and
amplify an RF signal from an input power to an output power based on the selected modulated voltage and the selected bias voltage; and
a control circuit coupled to the power management circuit and configured to;
determine whether the selected bias voltage is lower than a defined bias voltage threshold; and
cause the power management circuit to increase the selected bias voltage at the selected bias voltage port to the defined bias voltage threshold in response to the selected bias voltage being lower than the defined bias voltage threshold.
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Accused Products
Abstract
A radio frequency (RF) front-end circuit is provided. A power management circuit is configured to output a first modulated voltage, a second modulated voltage, a first bias voltage, and a second bias voltage via a first voltage port(s), a second voltage port(s), a first bias voltage port(s), and a second bias voltage port(s), respectively. An amplifier circuit(s) is configured to amplify an RF signal based on a selected modulated voltage and a selected bias voltage outputted by a selected voltage port and a selected bias voltage port, respectively. The power management circuit can be controlled to dynamically increase the selected bias voltage at the selected bias voltage port in case the selected bias voltage drops below a defined bias voltage threshold. As such, it may be possible to maintain the selected bias voltage at a desirable level, thus enabling the amplifier circuit(s) to operate with improved linearity and efficiency.
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Citations
21 Claims
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1. A radio frequency (RF) front-end circuit comprising:
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a power management circuit configured to; output a first modulated voltage via a first voltage port; output a second modulated voltage via a second voltage port; output a first bias voltage via a first bias voltage port; and output a second bias voltage via a second bias voltage port; an amplifier circuit coupled to a selected voltage port among the first voltage port and the second voltage port and a selected bias voltage port among the first bias voltage port and the second bias voltage port, the amplifier circuit configured to; receive a selected modulated voltage and a selected bias voltage from the selected voltage port and the selected bias voltage port, respectively; and amplify an RF signal from an input power to an output power based on the selected modulated voltage and the selected bias voltage; and a control circuit coupled to the power management circuit and configured to; determine whether the selected bias voltage is lower than a defined bias voltage threshold; and cause the power management circuit to increase the selected bias voltage at the selected bias voltage port to the defined bias voltage threshold in response to the selected bias voltage being lower than the defined bias voltage threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A radio frequency (RF) front-end circuit comprising:
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a power management circuit configured to; output a first modulated voltage via a first voltage port; output a second modulated voltage via a second voltage port; output a first bias voltage via a first bias voltage port; and output a second bias voltage via a second bias voltage port; an amplifier circuit coupled to a selected voltage port among the first voltage port and the second voltage port and a selected bias voltage port among the first bias voltage port and the second bias voltage port, the amplifier circuit configured to; receive a selected modulated voltage and a selected bias voltage from the selected voltage port and the selected bias voltage port, respectively; and amplify an RF signal from an input power to an output power based on the selected modulated voltage and the selected bias voltage; and wherein the power management circuit is further configured to; determine whether the selected bias voltage is lower than a defined bias voltage threshold; and increase the selected bias voltage at the selected bias voltage port to the defined bias voltage threshold in response to the selected bias voltage being lower than the defined bias voltage threshold. - View Dependent Claims (20, 21)
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Specification