Methods of adjusting band-based amplifier linearity
AssigneeSiGe Semiconductor Inc.
InventorsAlan J.A. Trainor, Grant Darcy Poulin, Craig Joseph Christmas
Life of this patent
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Abstract
A method to improve amplifier efficiency of operation relative to that of an amplifier with fixed biasing is operating channel dependent. A bias current for an amplifying transistor of an amplifier circuit is determined based at least in part on an operating channel. The amplifying transistor operates in a multi-channel system, where the bias current for the amplifying transistor operating at channels at an edge of a channel band is different from the bias current for the amplifying transistor operating at channels nearer a center of the channel band.
Claims21
(canceled)
A method comprising determining a bias current for an amplifying transistor based at least in part on an operating channel, the bias current for the amplifying transistor operating at channels at an edge of a channel band being different from the bias current for the amplifying transistor operating at channels nearer a center of the channel band.
A method comprising:
- receiving at a control circuit an indication of transmission power of an amplifier circuit;
- and
- determining a control signal based at least in part on the indication of transmission power and operating requirements of the amplifier circuit to control a bias current provided to an amplifying transistor of the amplifier circuit, the bias current for the amplifying transistor operating at channels at an edge of a channel band being different from the bias current for the amplifying transistor operating at channels nearer a center of the channel band.
Dependencies are inferred from the claim text.