公开(公告)号：US20240339972A1

公开(公告)日：2024-10-10

申请号：US18519095

申请日：2023-11-27

Applicant: RichWave Technology Corp.

Inventor： Chia-Jung Yeh ,  Chih-Sheng Chen

IPC: H03F3/24 ,  H03K17/56 ,  H04B1/40

CPC classification number: H03F3/245 ,  H03K17/56 ,  H04B1/40 ,  H03F2200/294 ,  H03F2200/451

Abstract: A radio frequency circuit is provided. The radio frequency circuit includes a first terminal, a second terminal, a power amplifier, and a coupling circuit. The power amplifier is coupled between the first terminal and the second terminal. The power amplifier is configured to receive a first signal. The coupling circuit includes a first coupling terminal, a second coupling terminal, and at least one transistor. The first coupling terminal is coupled to the power amplifier and the second terminal. The at least one transistor is connected in series between the first coupling terminal and the second coupling terminal. In a coupling mode, the at least one transistor is in an at least partial cut-off state, and the at least one transistor provides a coupling signal at the second coupling terminal through capacitive coupling. The first signal is controlled according to the coupling signal.

公开(公告)号：US12107548B2

公开(公告)日：2024-10-01

申请号：US17229809

申请日：2021-04-13

Applicant: RichWave Technology Corp.

Inventor： Pin-Yi Huang ,  Chih-Sheng Chen ,  Ching-Wen Hsu

IPC: H03G3/12 ,  H03F1/02 ,  H03F3/19 ,  H03G3/30 ,  H03F1/08 ,  H03F1/22

CPC classification number: H03F1/0205 ,  H03F3/19 ,  H03G3/30 ,  H03F1/083 ,  H03F1/223

Abstract: An amplifier circuit includes an input terminal used to receive an input signal, an output terminal used to output an output signal, an amplification unit, and a phase adjustment unit. The amplification unit includes an input terminal coupled to the input terminal of the amplifier circuit, an output terminal coupled to the output terminal of the amplifier circuit, a first terminal coupled to a first voltage terminal, and a second terminal coupled to a second voltage terminal. The phase adjustment unit is coupled to the amplification unit. When the amplifier circuit is operated in a first mode, the output signal has a first phase, and when the amplifier circuit is operated in a second mode, the output signal has a second phase. A difference between the first phase and the second phase is within a predetermined range.

公开(公告)号：US12063029B2

公开(公告)日：2024-08-13

申请号：US18219068

申请日：2023-07-06

Applicant: RichWave Technology Corp.

Inventor： Hsiang-Jen Jao ,  Tien-Yun Peng ,  Chih-Sheng Chen

IPC: H03K17/0412

CPC classification number: H03K17/04123

Abstract: A switch device includes a first radio-frequency (RF) terminal, a second RF terminal, a first transistor, a second transistor, and a variable resistance element. The first transistor includes a first terminal coupled to the first RF terminal, a second terminal, and a control terminal coupled to a control signal terminal providing a control signal. The second transistor includes a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the second RF terminal, and a control terminal. The variable resistance element is coupled between the second terminal of the first transistor and a bias voltage terminal. When the first transistor and the second transistor are in a transient state, the variable resistance element provides a lower resistance. When the first transistor and the second transistor are in an ON state, the variable resistance element provides a higher resistance.

公开(公告)号：US20240204769A1

公开(公告)日：2024-06-20

申请号：US18091343

申请日：2022-12-29

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Hsien-Huang Tsai ,  Meng-Lun Li

IPC: H03K17/10

CPC classification number: H03K17/102 ,  H03K2217/0054

Abstract: A switch device includes a first switch unit, a second switch unit, a first sub-switch unit, a second sub-switch unit, a first resistor and a second resistor. The first switch unit is coupled to a radio-frequency terminal and coupled to the second switch unit in cascode. The first sub-switch unit is coupled to the second sub-switch unit in cascode. The first sub-switch unit is further coupled between control terminals of the first switch unit and the second switch unit. The first sub-switch unit is further coupled to a node between the first resistor and the first switch unit. The second sub-switch unit is further coupled to a node between the second resistor and the second switch unit. When the first switch unit and the second switch unit are transitioned, the first sub-switch unit and the second sub-switch unit can be turned on to discharge and/or neutralize accumulated charges.

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：US20230296655A1

公开(公告)日：2023-09-21

申请号：US18202961

申请日：2023-05-29

Applicant: RichWave Technology Corp.

Inventor： Po-Wei Wu ,  Hsiang-Jen Jao ,  Chih-Sheng Chen ,  Tien-Yun Peng

IPC: G01R29/027

CPC classification number: G01R29/0273

Abstract: A compensation circuit includes a resistor-capacitor circuit and a control circuit. The resistor-capacitor circuit is used to generate a first voltage when a reference signal is in a first state, and generate a second voltage and a third voltage when the reference signal is in a second state. The resistor-capacitor circuit includes a first resistor-capacitor sub-circuit and a second resistor-capacitor sub-circuit. The first resistor-capacitor sub-circuit and the second resistor-capacitor sub-circuit are coupled to the control circuit, and operate simultaneously to compute an ON time of a front end module. The control circuit is coupled to the resistor-capacitor circuit, and is used to acquire the ON time according to the first voltage, the second voltage, and the third voltage, and includes an adjustment circuit used to generate a bias signal according to the ON time, and output the bias signal to the front end module.

公开(公告)号：US11750239B2

公开(公告)日：2023-09-05

申请号：US17555526

申请日：2021-12-20

Applicant: RichWave Technology Corp.

Inventor： Chia-Wei Hsu ,  Chih-Sheng Chen ,  Yu-Hsuan Chao

IPC: H04B1/48 ,  H04B1/16 ,  H04B1/00 ,  H04B1/04

CPC classification number: H04B1/48 ,  H04B1/006 ,  H04B1/0483 ,  H04B1/1615

Abstract: A front end module includes a first radio frequency (RF) terminal, a second RF terminal, a third RF terminal, a transmission path and a reception path. The transmission path is formed between the first RF terminal and the third RF terminal. The reception path is formed between the first RF terminal and the second RF terminal. The reception path includes a first set of switches, a second set of switches, a third set of switches and an amplifier. An amplifier is coupled to the second set of switches and the second RF terminal. The third set of switches is coupled to the first set of switches and the second RF terminal. When a transmission signal is transmitted to the first RF terminal via the transmission path, the first set of switches, the second set of switches and the third set of switches are turned off.

公开(公告)号：US11716105B2

公开(公告)日：2023-08-01

申请号：US17542463

申请日：2021-12-05

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Yu-Hsiang Chu

IPC: H04B1/04 ,  H04B1/40 ,  H04B1/16 ,  H04B1/44

CPC classification number: H04B1/0483 ,  H04B1/1607 ,  H04B1/44

Abstract: A radio frequency switch has an antenna end, a first signal end for transmitting a first radio frequency signal, a second signal end for transmitting a second radio frequency signal, a third signal end for transmitting a third radio frequency signal, a first series path having a first switch, a second series path having a second switch, a third series path having a third switch, a first shunt path coupled between the first signal end and a node, a second shunt path coupled between the second signal end and the node, a common path coupled between the node and a first reference voltage end, and a third shunt path coupled between the third signal end and a second reference voltage end. The first series path and the second series path are connected to a common ground pad via the common path.

公开(公告)号：US20230194574A1

公开(公告)日：2023-06-22

申请号：US18110865

申请日：2023-02-16

Applicant: RichWave Technology Corp.

Inventor： Tien-Yun Peng ,  Hsien-Huang Tsai ,  Chih-Sheng Chen

IPC: G01R19/00 ,  H03K19/20

CPC classification number: G01R19/0046 ,  H03K19/20

Abstract: A voltage state detector includes a voltage drop circuit, a pull-down circuit, a load circuit, a transistor, a pull-up circuit, first and second output terminals, and a logic circuit. The pull-down circuit is coupled to the voltage drop circuit. The transistor has a first terminal coupled to the load circuit, a second terminal coupled to the pull-down circuit, and a control terminal coupled to the voltage drop circuit. The pull-up circuit is coupled to the load circuit and the voltage drop circuit. The first output terminal is coupled to the first terminal of the transistor for outputting a first state determination signal. The second output terminal is coupled to the voltage drop circuit for outputting a second state determination signal. The logic circuit includes a NOR gate for performing an NOR operation on the first state determination signal and the second state determination signal to output a control signal.