Power amplifier bias circuit having controllable current profile
AssigneeSkyworks Solutions, Inc.
InventorsLi-hung Kang, Younkyu Chung
Life of this patent
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Abstract
A power amplifier bias circuit having a controllable current profile includes a first transistor device configured as a switch, and configured to receive a non-regulated system voltage, and a plurality of resistors configured to provide a current and configured to determine an amount of a bias current that flows through a second transistor device, where the second transistor device is part of a current mirror comprising a third transistor device and the amount of bias current flowing through the second transistor device determines a power output of the third transistor device.
Claims19
A power amplifier bias circuit having a controllable current profile, comprising:
- a first transistor device configured as a switch and configured to receive a non-regulated system voltage;
- and
- a plurality of resistors configured to provide a current and configured to determine an amount of a bias current that flows through a second transistor device, where the second transistor device is part of a current mirror comprising a third transistor device and the amount of bias current flowing through the second transistor device determines a power output of the third transistor device.
A portable transceiver having a power amplifier bias circuit having a controllable current profile, comprising:
- a transmitter operatively coupled to a receiver;
- a power amplifier element including:
- a first transistor device configured as a switch and configured to receive a non-regulated system voltage;
- and
- a plurality of resistors configured to provide a current and configured to determine an amount of a bias current that flows through a second transistor device, where the second transistor device is part of a current mirror comprising a third transistor device and the amount of bias current flowing through the second transistor device determines a power output of the third transistor device.
A method for biasing a power amplifier, comprising:
- configuring a first transistor device as a switch, the first transistor device provided with a non-regulated system voltage;
- and
- providing a plurality of resistors configured to provide a current and configured to determine an amount of a bias current that flows through a second transistor device, where the second transistor device is part of a current mirror comprising a third transistor device and the amount of bias current flowing through the second transistor device determines a power output of the third transistor device.
Dependencies are inferred from the claim text.