R.F. output power control
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorWalter Kodim
Life of this patent
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Abstract
An R.F. power amplifier circuit comprising a power control loop is described. The power control loop includes an R.F. power amplifier having a power control input and a power supply input as well as at least one feedback path coupled between the power control input and the power supply input of the power amplifier. The feedback path includes at least one variable loop element that has a control terminal configured to reduce variations of control loop parameters.
Claims20
An R.F. power amplifier circuit comprising a power control loop with:
- an R.F. power amplifier having a power control input and a power supply input;
- and
- at least one variable loop element coupled between the power control input and the power supply input of the power amplifier, the at least one variable loop element having a control input configured to reduce variations of control loop parameters.
A power control loop for an R.F, power amplifier circuit, the power control loop comprising:
- an R.F. power amplifier having a power control input and a power supply input;
- and
- a variable capacitance coupled between the power control input and the power supply input of the power amplifier, the variable capacitance having a control input for inputting a control signal for linearizing control loop parameters.
A power control loop of an R.F. power amplifier circuit, the power control loop comprising:
- an RF power amplifier having a power control input and a power supply input;
- at least one variable element arranged between the power control input and the power supply input of the power amplifier, the at least one variable element having a control input;
- and
- an internal control loop including the variable element, the internal control loop being formed by coupling the control input of the variable element to either one of the power control loop or a signal supply branch for the power control loop,
- wherein the control input of the variable element is configured to reduce variations of control loop parameters.
A method of controlling the output power of an R.F. power amplifier using a power control loop for taking into account a feedback signal characteristic of a current consumption of the power amplifier, comprising:
- providing at least one loop element with variable characteristics, the at least one loop element having a control input;
- and
- varying the characteristics of the loop element by applying a control signal to the control input of the variable loop element such that variations of control loop parameters are reduced.
A computer program product for controlling the output power of an R.F. power amplifier using a power control loop for taking into account a feed back signal characteristic of a current consumption of the power amplifier, wherein at least one loop element with variable characteristics and with a control input is provided, the computer program product comprising program code portions for varying the characteristics of the loop element such that variations of control loop parameters are reduced.
Dependencies are inferred from the claim text.