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

Claim 16:
17. A method for valley compensation in a power amplifier system, the method comprising:
generating, for each gain setting of at least a portion of a plurality of gain settings, a respective compensation value of a plurality of compensation values by:
setting a digital amplitude signal to indicate the gain setting, the digital amplitude signal converted by a digital to analog converter to an analog amplitude signal, the analog amplitude signal coupled with a power amplifier circuit configured to generate a signal output from a signal input such that the signal output has an amplitude based on the gain setting and a common mode based on a supply voltage;
detecting a present output valley level of an amplitude envelope of the signal output at the gain setting;
computing the respective compensation value for the gain setting based on the detecting the present output valley level, the respective compensation value corresponding to a respective compensated supply voltage level, calibrated such that setting the supply voltage to the respective compensated supply voltage level with the digital amplitude signal set to the 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; and
storing the respective compensation value in a lookup table in association with the gain setting.