公开(公告)号：US10079574B2

公开(公告)日：2018-09-18

申请号：US15019409

申请日：2016-02-09

Applicant: MediaTek Inc.

Inventor： Hsing-ting Yu ,  Fei Song ,  I-Chang Wu ,  YuenHui Chee ,  Chiyuan Lu ,  Keng Leong Fong ,  Osama K. A. Shana'a

IPC: H03F3/45 ,  H03F1/02 ,  H03F3/193 ,  H03F3/21

CPC classification number: H03F1/0222 ,  H03F1/0261 ,  H03F1/0266 ,  H03F1/0277 ,  H03F1/0288 ,  H03F1/48 ,  H03F3/193 ,  H03F3/211 ,  H03F3/245 ,  H03F3/45 ,  H03F3/45071 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/18 ,  H03F2200/36 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2200/465 ,  H03F2200/555 ,  H03F2203/21106 ,  H03F2203/45311 ,  H03F2203/45352 ,  H03F2203/45368 ,  H03F2203/45544 ,  H03F2203/45674 ,  H03F2203/7206

Abstract: Methods and apparatus for providing adaptive biasing to power amplifiers. Adaptive bias circuits are configured to provide sharp turn on and/or current clamping to improve the efficiency of a power amplifier over a wide input signal bandwidth. Sharp turn on may be achieved using a subtraction technique to subtract outputs from multiple detectors. Clamping may be achieved using MOSFET device characteristics to pull the device from the triode region into the saturation, subtraction techniques to subtract the outputs from multiple detectors, and/or by using circuit devices, such as diodes.

公开(公告)号：US20170230006A1

公开(公告)日：2017-08-10

申请号：US15019409

申请日：2016-02-09

Applicant: MediaTek Inc.

Inventor： Hsing-ting Yu ,  Fei Song ,  I-Chang Wu ,  YuenHui Chee ,  Chiyuan Lu ,  Keng Leong Fong ,  Osama K.A. Shana'a

IPC: H03F1/02 ,  H03F3/21 ,  H03F3/193

CPC classification number: H03F1/0222 ,  H03F1/0261 ,  H03F1/0266 ,  H03F1/0277 ,  H03F1/0288 ,  H03F1/48 ,  H03F3/193 ,  H03F3/211 ,  H03F3/245 ,  H03F3/45 ,  H03F3/45071 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/18 ,  H03F2200/36 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2200/465 ,  H03F2200/555 ,  H03F2203/21106 ,  H03F2203/45311 ,  H03F2203/45352 ,  H03F2203/45368 ,  H03F2203/45544 ,  H03F2203/45674 ,  H03F2203/7206

Abstract: Methods and apparatus for providing adaptive biasing to power amplifiers. Adaptive bias circuits are configured to provide sharp turn on and/or current clamping to improve the efficiency of a power amplifier over a wide input signal bandwidth. Sharp turn on may be achieved using a subtraction technique to subtract outputs from multiple detectors. Clamping may be achieved using MOSFET device characteristics to pull the device from the triode region into the saturation, subtraction techniques to subtract the outputs from multiple detectors, and/or by using circuit devices, such as diodes.