Patent ID: 11870396
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 9:
10. A method for valley compensation in a power amplifier system, the method comprising:
monitoring a digital amplitude signal to detect a present gain setting of a plurality of gain settings, the digital amplitude signal being converted by a digital to analog converter to an analog amplitude signal, the analog amplitude signal used to amplitude modulate a signal output of a power amplifier circuit, the power amplifier circuit generating the signal output according to a supply voltage and to the present gain setting as indicated by the digital amplitude signal;
identifying a present compensation value as associated with the present gain setting, the present compensation value being one of a plurality of compensation values, each stored by a lookup table in association with a respective gain setting of the plurality of gain settings, and each corresponding to a respective compensated supply voltage level that is calibrated so that setting the supply voltage to the respective compensated supply voltage level when the present gain setting is set to the respective gain setting causes an output valley level of the signal output generated by the power amplifier circuit to be substantially at a predetermined target valley level;
generating a compensation signal based on the present compensation value; and
outputting the compensation signal to a supply modulator circuit to generate the supply voltage at the respective compensated supply voltage level corresponding to the present compensation value.