Dynamic stability, gain, efficiency and impedance control in a linear/non-linear CMOS power amplifier
First Claim
1. An apparatus comprising:
- a baseband processing module to provide baseband processing to transmit a signal;
a transmitter module coupled to the baseband module to modulate the signal from the baseband processing module; and
a radio frequency (RF) amplifier module coupled to the transmitter module to receive the modulated signal and coupled to the baseband processing module to receive control signals from the baseband processing module to operate the RF amplifier module, wherein the RF amplifier module is operable to select between a linear mode of operation and a non-linear mode of operation in which the RF amplifier module is selectable to change device sizing of at least one stage of a RF amplifier circuit, change biasing of at least one stage of the RF amplifier circuit and change impedance of a matching network for at least one stage of the RF amplifier circuit, when switching between the non-linear and linear modes of operation.
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Accused Products
Abstract
A power amplifier (PA) provides dynamic stability and gain control for linear and non-linear operation. The PA operates with a baseband processor and a transmitter, in which the PA receives a signal from the transmitter for power amplification prior to transmission of the signal. The PA is configured to select between the linear mode of operation and the non-linear mode of operation, in which device scaling within the PA is achieved by changing a device sizing of at least one stage of the PA. Further to changing the device size, the PA changes biasing resistance and impedance of a matching network in response to the changing of the device size to control power output and stability for the PA.
69 Citations
20 Claims
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1. An apparatus comprising:
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a baseband processing module to provide baseband processing to transmit a signal; a transmitter module coupled to the baseband module to modulate the signal from the baseband processing module; and a radio frequency (RF) amplifier module coupled to the transmitter module to receive the modulated signal and coupled to the baseband processing module to receive control signals from the baseband processing module to operate the RF amplifier module, wherein the RF amplifier module is operable to select between a linear mode of operation and a non-linear mode of operation in which the RF amplifier module is selectable to change device sizing of at least one stage of a RF amplifier circuit, change biasing of at least one stage of the RF amplifier circuit and change impedance of a matching network for at least one stage of the RF amplifier circuit, when switching between the non-linear and linear modes of operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a baseband processing module to provide baseband processing to transmit a signal; a transmitter module coupled to the baseband module to convert the signal from the baseband processing module to a radio frequency (RF) signal; and a power amplifier (PA) coupled to the transmitter module to receive the RF signal and coupled to the baseband processing module to receive control signals from the baseband processing module to operate the PA, wherein the PA is operable to select between a linear mode of operation and a non-linear mode of operation for the PA in which the PA has at least one stage that is selectable to change device sizing of a transistor circuit, change biasing of the transistor circuit and change matching network coupled to the transistor circuit, when switching between the non-linear and linear modes of operation.
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- 8. The apparatus of 7 further including a supply control module to control a supply voltage coupled to the transistor circuit.
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16. A method comprising:
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receiving a baseband signal that is to be transmitted; converting the baseband signal to a radio frequency (RF) signal in a radio transmitter; coupling the RF signal to a power amplifier (PA) that is integrated on a complementary metal-oxide-semiconductor (CMOS) integrated circuit device; selecting an operating mode for the RF signal that is to be transmitted, wherein the operating mode includes both a linear mode of operation for the PA and a non-linear mode of operation for the PA; selecting a device size for the PA based on a selected output power and mode of operation of the PA; selecting a biasing resistance value for the PA based on a selected output power and mode of operation of the PA; selecting an impedance of a matching network for the PA based on a selected output power and mode of operation of the PA; and transmitting an output signal from the PA. - View Dependent Claims (17, 18, 19, 20)
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Specification