公开(公告)号：US20240089876A1

公开(公告)日：2024-03-14

申请号：US17943400

申请日：2022-09-13

Applicant: Apple Inc.

Inventor： Andrea Camuffo ,  Andreas Langer ,  Guenther Hackl ,  Stephan Henzler

IPC: H04W52/52 ,  H03G3/30 ,  H04W52/36

CPC classification number: H04W52/52 ,  H03G3/3042 ,  H04W52/36

Abstract: This disclosure is directed to compensating for gain drift due to switching the output power of a transmitter of an electronic device. In some cellular network applications, the transmit power level of a transmitter may be frequently adjusted from a low power level to a high power level. If the power level is not switched to the desired power level within a given interval, the transmission signal may be distorted. To enable the transmitter to reach a desired output power within the interval, the voltage supply of a power amplifier may be raised during a low power symbol, which may produce an undesirable gain increase. To mitigate or eliminate the low power symbol gain increase, a gain compensation signal may be introduced into the transmitter. The compensation signal may be adjusted and refined by implementing a power control loop, the power control loop may include a signal generator.

公开(公告)号：US20240097636A1

公开(公告)日：2024-03-21

申请号：US17943399

申请日：2022-09-13

Applicant: Apple Inc.

Inventor： Andrea Camuffo ,  Andreas Langer ,  Guenther Hackl ,  Stephan Henzler

IPC: H03G3/30 ,  H04W52/52

CPC classification number: H03G3/3042 ,  H04W52/52

Abstract: This disclosure is directed to compensating for gain drift due to switching the output power of a transmitter of an electronic device. In some cellular network applications, the transmit power level of a transmitter may be frequently adjusted from a low power level to a high power level. If the power level is not switched to the desired power level within a given interval, the transmission signal may be distorted. To enable the transmitter to reach a desired output power within the interval, the voltage supply of a power amplifier may be raised during a low power symbol, which may produce an undesirable gain increase. To mitigate or eliminate the low power symbol gain increase, a gain compensation signal may be introduced into the transmitter. The compensation signal may be adjusted and refined by implementing a power control loop, the power control loop may include a power controller.