Apparatus and method for calibrating characteristics of power amplifier in transmitter
AssigneeMediatek Inc.
InventorsYu-Hsien Chang, Yu-Ming Lai, Ching-Chia Cheng, Wei-Kai Hong, Yi-Chu Chen, Tsung-Ming Chen, Shih-Chieh Yen
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Abstract
A calibration apparatus is used for calibrating characteristics of a power amplifier (PA) in a transmitter. The calibration apparatus includes an adaptive bias generator circuit that is used to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.
Claims20
A calibration apparatus for calibrating characteristics of a power amplifier (PA) in a transmitter comprising:
- an adaptive bias generator circuit, arranged to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.
A calibration method for calibrating characteristics of a power amplifier (PA) in a transmitter comprising:
- tracking an envelope of an input signal received by control terminals of transistors of the PA;
- and
- generating an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.
Dependencies are inferred from the claim text.