公开(公告)号：US10608598B2

公开(公告)日：2020-03-31

申请号：US16021762

申请日：2018-06-28

Applicant: Qualcomm Technologies, Inc.

Inventor： Chuan Wang ,  Li Liu ,  Kevin Hsi Huai Wang ,  Bhushan Shanti Asuri ,  Gurkanwal Sahota ,  Francesco Carrara

IPC: H01Q1/00 ,  H03F1/56 ,  H03F3/24 ,  H03F3/19 ,  H01Q23/00 ,  H01P5/18

Abstract: In an example aspect, an apparatus includes a balanced power amplifier, which performs amplification in the presence of a variable antenna impedance. The balanced power amplifier includes a quadrature output power combiner coupled to a first power amplifying path and a second power amplifying path, detection circuitry, and control circuitry. The detection circuitry includes at least one power detector coupled to an isolated port of the quadrature output power combiner and a resistor coupled between the isolated port and a ground. The at least one power detector is configured to measure power at the isolated port, which is based on a resistance of the resistor. The control circuitry is configured to adjust operating conditions of a first power amplifier of the first power amplifying path and the second power amplifier of the second power amplifying path based on the power that is measured at the isolated port.

公开(公告)号：US20200007092A1

公开(公告)日：2020-01-02

申请号：US16021762

申请日：2018-06-28

Applicant: Qualcomm Technologies, Inc.

Inventor： Chuan Wang ,  Li Liu ,  Kevin Hsi Huai Wang ,  Bhushan Shanti Asuri ,  Gurkanwal Sahota ,  Francesco Carrara

IPC: H03F1/56 ,  H03F3/24 ,  H03F3/19 ,  H01P5/18 ,  H01Q23/00

Abstract: An apparatus is disclosed for amplification in presence of a variable antenna impedance. In an example aspect, the apparatus comprises a balanced power amplifier, which includes a quadrature output power combiner coupled to a first power amplifying path and a second power amplifying path, detection circuitry, and control circuitry. The detection circuitry includes at least one power detector coupled to an isolated port of the quadrature output power combiner and a resistor coupled between the isolated port and a ground. The at least one power detector is configured to measure power at the isolated port, which is based on a resistance of the resistor. The control circuitry is configured to adjust operating conditions of a first power amplifier of the first power amplifying path and the second power amplifier of the second power amplifying path based on the power that is measured at the isolated port.