公开(公告)号：US20160069940A1

公开(公告)日：2016-03-10

申请号：US14745483

申请日：2015-06-22

Applicant: MEDIATEK INC.

Inventor： Po-Yu Chang

IPC: G01R21/133 ,  H03F3/21

CPC classification number: G01R21/133 ,  H03F3/21 ,  H04B17/0085 ,  H04B17/102 ,  H04B17/104 ,  H04B17/13 ,  H04B17/14 ,  H04B17/16 ,  H04B17/19

Abstract: A power detector for detecting an output power of a power amplifier is provided. The power amplifier is used to transmit signal power to the antenna. The power detector includes a phase shifter, a multiplier and a calibration unit. The phase shifter sequentially applies a plurality of candidate phase calibration amounts to the output voltage of the power amplifier to generate a plurality of adjusted signals with different phases in a calibration mode. The multiplier sequentially mixes the replica current and each of the plurality of adjusted signals, to generate a plurality of analog signals with different phases. The calibration circuit determines a target phase calibration amount of the phase shifter from the candidate phase calibration amounts according to the plurality of analog signals.

Abstract translation: 提供了用于检测功率放大器的输出功率的功率检测器。 功率放大器用于向天线发送信号功率。 功率检测器包括移相器，乘法器和校准单元。 移相器顺序地将多个候选相位校准量施加到功率放大器的输出电压，以在校准模式中产生具有不同相位的多个调整信号。 乘法器依次混合复制电流和多个经调整的信号中的每一个，以产生具有不同相位的多个模拟信号。 校准电路根据多个模拟信号从候选相位校准量确定移相器的目标相位校准量。

公开(公告)号：US20240243769A1

公开(公告)日：2024-07-18

申请号：US18404766

申请日：2024-01-04

Applicant: MediaTek Inc.

Inventor： Tsung-Ming Chen ,  Wei-Kai Hong ,  Ting-Wei Liang ,  Wei-Pang Chao ,  Po-Yu Chang

IPC: H04B1/38 ,  H04B1/00

CPC classification number: H04B1/38 ,  H04B1/0096

Abstract: A radio frequency (RF) front-end circuit of a wireless communication device is provided. The RF front-end circuit includes a receiving amplifier, a down-converter, an up-converter, a transmitting amplifier and an output driver, where the receiving amplifier and the down-converter are configured to process received signals according to a local oscillation (LO) signal, and the up-converter, the transmitting amplifier and the output driver are configured to process transmitted signals according to the LO signal. The receiving amplifier, the up-converter or the transmitting amplifier includes a transformer load. The transformer load includes a switchable inductor. When the wireless communication device operates in a first mode, the LO signal has a first frequency, and the switchable inductor has a first inductance. When the wireless communication device operates in a second mode, the LO signal has a second frequency, and the switchable inductor has a second inductance.

公开(公告)号：US09778297B2

公开(公告)日：2017-10-03

申请号：US14745483

申请日：2015-06-22

Applicant: MEDIATEK INC.

Inventor： Po-Yu Chang

IPC: G01R25/00 ,  G01R21/133 ,  H03F3/21 ,  H04B17/13 ,  H04B17/16 ,  H04B17/00 ,  H04B17/10 ,  H04B17/14 ,  H04B17/19

CPC classification number: G01R21/133 ,  H03F3/21 ,  H04B17/0085 ,  H04B17/102 ,  H04B17/104 ,  H04B17/13 ,  H04B17/14 ,  H04B17/16 ,  H04B17/19

Abstract: A power detector for detecting an output power of a power amplifier is provided. The power amplifier is used to transmit signal power to the antenna. The power detector includes a phase shifter, a multiplier and a calibration unit. The phase shifter sequentially applies a plurality of candidate phase calibration amounts to the output voltage of the power amplifier to generate a plurality of adjusted signals with different phases in a calibration mode. The multiplier sequentially mixes the replica current and each of the plurality of adjusted signals, to generate a plurality of analog signals with different phases. The calibration circuit determines a target phase calibration amount of the phase shifter from the candidate phase calibration amounts according to the plurality of analog signals.