Preserving Linearity of a RF Power Amplifier
OwnerAdrianus Van Bezooijen, Christophe Chanloinventors
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Abstract
A method and circuit for preserving linearity of a RF power amplifier, the power amplifier including a RF power output unit having a characteristic drive level and fed by a supply voltage, comprising measuring the output voltage of the RF power output unit; comparing the measured output voltage to at least one threshold voltage to produce a control signal; and adapting the drive level or the supply voltage of the RF power output unit by means of the control signal to operate the output unit below its saturation level. A method and circuit for stabilizing an antenna circuit comprising a RF power amplifier and a matching circuit by preserving linearity of a RF power amplifier, where the above power amplifier is used.
Claims19
A method for preserving linearity of a RF power amplifier, the power amplifier including a RF power output unit having a characteristic drive level and fed by a supply voltage, comprising:
- measuring the output voltage of the RF power output unit;
- comparing the measured output voltage to at least one threshold voltage to produce a control signal;
- and
- selecting between reducing the drive level of the RF power output unit responsive to the control signal and increasing the supply voltage of the RF power output unit responsive to the control signal to thereby operate the output unit below its saturation level.
A method for controlling an antenna circuit comprising a RF power amplifier and a matching circuit by preserving linearity of a RF power amplifier, the power amplifier comprising a RF power output unit having a characteristic drive level and fed by a supply voltage source, comprising:
- measuring the output voltage of the RF power output unit;
- comparing the measured output voltage to at least one threshold voltage to produce a control signal;
- and
- adapting the output matching circuit by selecting between reducing the drive level of the RF power output unit responsive to the control signal and increasing the supply voltage of the RF power output unit responsive to the control signal, thereby operating the output unit below its saturation level.
A circuit for preserving linearity of a RF power amplifier wherein the power amplifier includes a RF power output unit having a characteristic drive level, comprising:
- a measuring unit measuring the output voltage of the RF power output unit;
- a comparing unit comparing the measured output voltage of the RF power output unit to a threshold voltage to produce a control signal;
- an adaptation unit configured to operate the output unit below its saturation level for preserving linearity of the RF power amplifier, the adaptation unit including a drive level adaptation unit for reducing the drive level of the RF power output unit and a supply voltage adaptation unit for increasing a supply voltage of the RF power output unit.
A circuit for stabilizing an antenna circuit comprising a RF power amplifier and a matching circuit, wherein the RF power amplifier comprises a RF power output unit having a characteristic drive level, comprising:
- a measuring unit measuring the output voltage of the RF power output unit;
- a comparing unit comparing the measured output voltage of the RF power output unit to a threshold voltage to produce a control signal;
- and
- an adaptation unit configured to adapt the output matching circuit responsive to the control signal to thereby operate the RF output unit below its saturation level for preserving linearity of the RF power amplifier, the adaptation unit including a drive level adaptation unit and a supply voltage adaptation unit.
Dependencies are inferred from the claim text.