Power amplifier
First Claim
1. A power amplifier, comprising:
- a common source amplification stage including a common source transistor configured to receive a radio frequency (RF) input signal via a gate of the common source transistor; and
a first common gate amplification stage connected in cascode between a variable supply voltage source and the common source amplification stage, and configured to amplify an output of the common source amplification stage,wherein the first common gate amplification stage includes;
a first common gate transistor connected in cascode to the common source transistor; and
a first gate bias controller configured to generate a first divided voltage based on a variable supply voltage of the variable supply voltage source, to generate a first gate bias voltage by buffering the first divided voltage, and to supply the first gate bias voltage to a gate of the first common gate transistor.
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Abstract
A power amplifier comprises a common source amplification stage and a first common gate amplification stage. The common source amplification stage includes a common source transistor for receiving a radio frequency (RF) input signal via a gate. The first common gate amplification stage is connected in cascode between a variable supply voltage source and the common source amplification stage, and amplifies an output of the common source amplification stage. The first common gate amplification stage includes a first common gate transistor, and a first gate bias controller configured to generate a first divided voltage based on a variable supply voltage of the variable supply voltage source, and to supply a first gate bias voltage generated by buffering the first divided voltage to a gate of the first common gate transistor.
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Citations
15 Claims
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1. A power amplifier, comprising:
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a common source amplification stage including a common source transistor configured to receive a radio frequency (RF) input signal via a gate of the common source transistor; and a first common gate amplification stage connected in cascode between a variable supply voltage source and the common source amplification stage, and configured to amplify an output of the common source amplification stage, wherein the first common gate amplification stage includes; a first common gate transistor connected in cascode to the common source transistor; and a first gate bias controller configured to generate a first divided voltage based on a variable supply voltage of the variable supply voltage source, to generate a first gate bias voltage by buffering the first divided voltage, and to supply the first gate bias voltage to a gate of the first common gate transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification