Multi-band amplifier module with harmonic suppression
First Claim
1. An amplifier circuit, comprising:
- a first power amplifier configured to produce a first amplified signal in response to a first input signal in a first frequency band, wherein the output of the first power amplifier is not coupled to a trap circuit;
a second power amplifier configured to produce a second amplified signal in response to a second input signal in a second frequency band, wherein a center frequency of the second frequency band is higher than the center frequency of the first frequency band;
a control circuit configured to turn on or turn off the first power amplifier and configured to turn on or turn off the second power amplifier; and
a shunting circuit coupled to an output of the second power amplifier, wherein the shunting circuit comprises a shunting switch that is configured to bypass harmonic signals from the first frequency band to the ground under the control of the control circuit.
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Accused Products
Abstract
An amplifier circuit includes a first power amplifier that can produce a first amplified signal in response to a first input signal in a first frequency band, and a second power amplifier that can produce a second amplified signal in response to a second input signal in a second frequency band. A center frequency of the second frequency band is higher than the a center frequency of frequency band A control circuit can turn on or turn off the first power amplifier and configured to turn on or turn off the second power amplifier. A shunting circuit is coupled to an output of the second power amplifier. The shunting circuit can attenuate harmonic signals from the first frequency band under the control of the control circuit.
28 Citations
21 Claims
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1. An amplifier circuit, comprising:
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a first power amplifier configured to produce a first amplified signal in response to a first input signal in a first frequency band, wherein the output of the first power amplifier is not coupled to a trap circuit; a second power amplifier configured to produce a second amplified signal in response to a second input signal in a second frequency band, wherein a center frequency of the second frequency band is higher than the center frequency of the first frequency band; a control circuit configured to turn on or turn off the first power amplifier and configured to turn on or turn off the second power amplifier; and a shunting circuit coupled to an output of the second power amplifier, wherein the shunting circuit comprises a shunting switch that is configured to bypass harmonic signals from the first frequency band to the ground under the control of the control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An amplifier circuit, comprising:
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a first power amplifier having a first power control terminal, wherein the first power amplifier is configured to produce a first amplified signal in response to a first input signal in a first frequency band, wherein the output of the first power amplifier is not coupled to a trap circuit; a second power amplifier having a second power control terminal, wherein the second power amplifier is configured to produce a second amplified signal in response to a second input signal in a second frequency band, wherein a center frequency of the second frequency band is higher than the center frequency of the first frequency band; a control circuit configured to send a first control signal to the first power control terminal of the first power amplifier to turn on or turn off the first power amplifier and to send a second control signal to the second power control terminal of the second power amplifier to turn on or turn off the second power amplifier; and a shunting circuit coupled to an output of the second power amplifier, wherein the shunting circuit comprises a shunting switch that is configured to be activated by the first control signal to bypass harmonic signals from the first power amplifier to the ground. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An integrated power amplifier module, comprising:
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a first power amplifier configured to produce a first amplified signal in response to a first input signal in a first frequency band, wherein the output of the first power amplifier is not coupled to a trap circuit; a second power amplifier configured to produce a second amplified signal in response to a second input signal in a second frequency band, wherein a center frequency of the second frequency band is higher than the center frequency of the first frequency band; a control circuit configured to turn on or turn off the first power amplifier and configured to turn on or turn off the second power amplifier; and a shunting circuit coupled to an output of the second power amplifier, wherein the shunting circuit comprises a shunting switch that is configured to bypass harmonic signals of the first frequency band to the ground under the control of the control circuit, wherein the first power amplifier, the second power amplifier, the control circuit, and the shunting circuit are constructed on a single semiconductor die. - View Dependent Claims (19, 20, 21)
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Specification