Power supply arrangement for multi-stage amplifier
AssigneeNujira Limited
InventorsRobert Henshaw, Gerard Wimpenny
Life of this patent
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Abstract
There is disclosed a multi-stage amplifier comprising: a first amplifier stage; a second amplifier stage; a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified; and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified.
Claims21
A multi-stage amplifier comprising:
- a first amplifier stage;
- a second amplifier stage;
- a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified;
- and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified.
A multi-stage amplifier comprising:
- a first amplifier stage;
- a second amplifier stage;
- a first tracking power supply stage for providing a tracking supply voltage to the first amplifier;
- and a second tracking power supply stage, for providing a tracking supply voltage to the second amplifier, wherein the second tracking power supply voltage tracks faster than the first.
A method of amplifying a signal in an amplification stage comprising a first amplifier stage;
- a second amplifier stage;
- a first voltage supply stage;
- and a second voltage supply stage, the method comprising:
- arranging the first voltage supply stage to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified;
- and arranging the second voltage supply stage to provide a supply voltage to the second amplifier in dependence on an instantaneous power of the signal to be amplified.
The method of wherein the first and second voltage supply stages selectively provide supply voltages to the first and second amplifier stages, wherein in a first mode of operation a signal is amplified by the first and second amplifier stages, and the first supply voltage stage is selected to provide a supply voltage to the first amplifier stage and the second supply voltage stage is selected to provide a supply voltage to the second amplifier stage, and in a second mode of operation the second amplifier is bypassed, the signal being amplified by the first amplifier stage, and the second supply voltage stage being selected to provide a supply voltage to the first amplifier stage.
-52. (canceled)
Dependencies are inferred from the claim text.