Wireless transmitter having polar loop controller with current feedback and methods
AssigneeMotorola, Inc.
InventorsGreg R. Black, Matt C. Hayek
Life of this patent
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Abstract
A wireless transmitter (100) including an amplifier (112), an automatic output controller (116) (AOC) having an output coupled to a control signal input. The AOC detects a second amplifier parameter that changes with a change in load impedance during a transmission, and the AOC reduces a change in transmitter output power related to the change in load impedance based on a first parameter and the detected second parameter during the same transmission during which the second parameter was detected.
Claims19
A method in a wireless transmitter having an amplifier and an automatic output controller, the method comprising:
- the automatic output controller detecting a parameter of the transmitter, the parameter changes with a change in load impedance of the transmitter during a transmission,
- the automatic output controller having a reference generator providing an amplifier control signal output, modifying the output of the reference generator based on the detected parameter;
- the automatic output controller reducing a change in transmitter output power related to the change in load impedance based on another parameter and based on the modified output of the reference generator.
A wireless transmitter, comprising:
- an amplifier having an output coupled to a load, the output having first and second parameters, the amplifier having a control signal input, the first parameter dependent on only the control signal input;
- an automatic output controller having an output coupled to the control signal input, the automatic output controller having a reference generator,
- the automatic output controller detecting the second parameter of the transmitter that changes with a change in load impedance of the transmitter during a transmission, the automatic output controller modifying an output of the reference generator based on the detected second parameter,
- the automatic output controller reducing a change in transmitter output power related to the change in load impedance based on the first parameter and the modified output of the reference generator during the same transmission during which the second parameter was detected.
A wireless transmitter, comprising:
- an amplifier;
- an automatic output controller coupled to the amplifier, the automatic output controller is a closed loop controller having a reference generator,
- the automatic output controller having an input configured to detect first and second parameters of the transmitter, the second parameter changes with a change in load impedance during transmission,
- the automatic output controller having an output configured to provide an amplifier control signal proportional to a difference between an output of the reference generator and a summation of the first and second signals,
- the automatic output controller configured to reduce a change in transmitter output power related to the change in load impedance based on the amplifier control signal during the same transmission during which the first and second parameters were detected.
A wireless transmitter, comprising:
- an amplifier;
- an automatic output controller coupled to the amplifier, the automatic output controller having a reference generator,
- the automatic output controller having an input configure to detect an output voltage and an output current of the transmitter, the output current changes with a change in load impedance of the transmitter during a transmission,
- the automatic output controller configured to modify an output of the reference generator based on the detected output current,
- the automatic output controller configured to reduce a change in transmitter output power related to the change in load impedance based on the modified output of the reference generator and the detected output voltage during the same transmission during which the output current and output voltage were detected.
Dependencies are inferred from the claim text.