公开(公告)号：US20230179242A1

公开(公告)日：2023-06-08

申请号：US17570361

申请日：2022-01-06

Applicant: RichWave Technology Corp.

Inventor： Pei-Chuan Hsieh ,  Chih-Sheng Chen ,  Hang Chang

IPC: H01Q5/335 ,  H04B1/10 ,  H01Q5/392

CPC classification number: H01Q5/335 ,  H04B1/1036 ,  H01Q5/392 ,  H04B2001/1072

Abstract: A radio frequency (RF) device and a multi-band matching circuit thereof are provided. The multi-band matching circuit includes an inductance circuit, a first capacitance circuit, an inductor, and a second capacitance circuit. A first terminal of the inductance circuit is coupled to a RF signal input terminal of the multi-band matching circuit. A first terminal of the first capacitance circuit is coupled to a second terminal of the inductance circuit. A first terminal of the inductor and a first terminal of the second capacitance circuit are coupled to a second terminal of the first capacitance circuit. A second terminal of the inductor is coupled to a first reference voltage. A second terminal of the second capacitance circuit is coupled to a second reference voltage. The second capacitance circuit is controlled by a single-bit control signal to change a capacitance value of the second capacitance circuit.

公开(公告)号：US20240171134A1

公开(公告)日：2024-05-23

申请号：US18084572

申请日：2022-12-20

Applicant: RichWave Technology Corp.

Inventor： Hang Chang ,  Chih-Sheng Chen

IPC: H03F3/19 ,  H03F1/02 ,  H03F1/56

CPC classification number: H03F3/19 ,  H03F1/0205 ,  H03F1/56 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/451

Abstract: A feedback circuit coupled between an input terminal and an output terminal of an amplifier circuit includes an input terminal, an output terminal, a first set of transistors and a second set of transistors. The first set of transistors is coupled between the input terminal and the output terminal of the feedback circuit, and includes a first terminal, a second terminal, and a control terminal used to receive a first control signal to turn on or off the first set of transistors. The second set of transistors is coupled between the input terminal and the output terminal of the feedback circuit, and includes a first terminal, a second terminal, and a control terminal used to receive a second control signal to turn on or off the second set of transistors.

公开(公告)号：US11799437B2

公开(公告)日：2023-10-24

申请号：US17570361

申请日：2022-01-06

Applicant: RichWave Technology Corp.

Inventor： Pei-Chuan Hsieh ,  Chih-Sheng Chen ,  Hang Chang

IPC: H03H7/01 ,  H03H7/38 ,  H04B1/10

CPC classification number: H03H7/0115 ,  H03H7/38 ,  H04B1/1036 ,  H04B2001/1072

Abstract: A radio frequency (RF) device and a multi-band matching circuit thereof are provided. The multi-band matching circuit includes an inductance circuit, a first capacitance circuit, an inductor, and a second capacitance circuit. A first terminal of the inductance circuit is coupled to a RF signal input terminal of the multi-band matching circuit. A first terminal of the first capacitance circuit is coupled to a second terminal of the inductance circuit. A first terminal of the inductor and a first terminal of the second capacitance circuit are coupled to a second terminal of the first capacitance circuit. A second terminal of the inductor is coupled to a first reference voltage. A second terminal of the second capacitance circuit is coupled to a second reference voltage. The second capacitance circuit is controlled by a single-bit control signal to change a capacitance value of the second capacitance circuit.

公开(公告)号：US11456738B1

公开(公告)日：2022-09-27

申请号：US17494852

申请日：2021-10-06

Applicant: RichWave Technology Corp.

Inventor： Hang Chang ,  Chih-Sheng Chen

IPC: H03K17/687

Abstract: A switch device includes a signal input terminal and a switch circuit. The signal input terminal is used to receive a radio frequency signal. The switch circuit is coupled to the signal input terminal, and includes a first transistor and a second transistor. The first transistor includes a control terminal used to receive a first control voltage to turn off the first transistor; a first terminal; and a second terminal. The second transistor includes a control terminal used to receive a second control voltage to turn off the second transistor; a first terminal; and a second terminal. The second control voltage is different from the first control voltage.