公开(公告)号：US20250132741A1

公开(公告)日：2025-04-24

申请号：US18389719

申请日：2023-12-19

Applicant: RichWave Technology Corp

Inventor： Tien-Yun Peng ,  Chih-Sheng Chen

IPC: H03F3/45

Abstract: An amplification circuit includes an amplifier, a first mirror-branch circuit, a second mirror-branch circuit, a first variable current source, a second variable current source, and an operation amplifier. The amplifier can receive an operation current and an input signal, and output the amplified input signal. The first mirror-branch circuit and the second mirror-branch circuit are coupled to the amplifier. The first variable current source is coupled to the first mirror-branch circuit and provides a first reference current. The second variable current source is coupled to the second mirror-branch circuit and provides a second reference current. The operation amplifier is coupled to the first mirror-branch circuit, the second mirror-branch circuit and the amplifier. The first reference current and the second reference current are related to the operation current.

公开(公告)号：US12206403B2

公开(公告)日：2025-01-21

申请号：US17510399

申请日：2021-10-26

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Yi-Bin Yang

IPC: H03K17/693 ,  H01P1/10 ,  H04B1/44

Abstract: A switch device structure includes RF1-st and RF2-nd input terminals, RFA-th, RFB-th and RFC-th output terminals, P2A-th, P1B-th and P1C-th paths, and first and second common paths. The P2A-th path includes a first terminal, and a second terminal coupled to the RFA-th output terminal. The P1B-th path includes a first terminal, and a second terminal coupled to the RFB-th output terminal. The P1C-th path includes a first terminal, and a second terminal coupled to the RFC-th output terminal. The first common path is coupled to the RF2-nd input terminal and the first terminal of the P2A-th path. The second common path is coupled to the RF1-st input terminal, the first terminal of the P1B-th path, and the first terminal of the P1C-th path. The first and second common paths cross each other on different planes to form a crossover.

公开(公告)号：US12184318B2

公开(公告)日：2024-12-31

申请号：US17688916

申请日：2022-03-08

Applicant: RichWave Technology Corp.

Inventor： Yu-Siang Huang ,  Chih-Sheng Chen

IPC: H04B1/16 ,  H04B1/18 ,  H04B1/44

Abstract: A radio frequency (RF) switch includes a signal terminal, a reference voltage terminal and a shunt switch path. The shunt switch path includes a first sub-shunt circuit and a second sub-shunt circuit. The second sub-shunt circuit includes a first transistor and a second transistor coupled in parallel. When switched to a first state, the RF switch has first impedance; when switched to a second state, the RF switch has second impedance; and when switched to a third state, the RF switch has third impedance. The first impedance, the second impedance, and the third impedance are different.

公开(公告)号：US12174289B2

公开(公告)日：2024-12-24

申请号：US17228722

申请日：2021-04-13

Applicant: RichWave Technology Corp.

Inventor： Hsiang-Feng Chi

IPC: G01S13/52 ,  G01S7/02 ,  G01S13/524 ,  G01S13/53

Abstract: The Doppler signal processing device includes a frequency analyzer, an interference suppressor, an interference baseline estimator and a synthesizer. The frequency analyzer can generate a frequency domain signal according to a digital signal. The interference suppressor can perform a suppression operation to generate an interference suppressed frequency domain signal. The interference baseline estimator can generate or update the frequency domain interference estimation signal according to the frequency domain signal. The synthesizer can generate an interference suppressed digital signal according to the interference suppressed frequency domain signal, where the interference suppressed digital signal is related to the digital signal with the interference energy suppressed.

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：US12038524B2

公开(公告)日：2024-07-16

申请号：US17557047

申请日：2021-12-21

Applicant: RichWave Technology Corp.

Inventor： Hsiang-Feng Chi

IPC: G01S7/02 ,  G01S7/292 ,  G01S13/02 ,  G01S13/58

CPC classification number: G01S7/023 ,  G01S7/2922 ,  G01S13/583 ,  G01S2013/0272

Abstract: A Doppler radar apparatus including a transmitting device, a receiving device and a narrowband interference suppression device is provided. The transmitting device is configured to transmit a first wireless signal. The receiving device is coupled to the transmitting device and is configured to receive a second wireless signal to generate a first digital signal. The first digital signal includes a Doppler signal component and a narrowband interference signal component, and a bandwidth of the narrowband interference signal component is smaller than a bandwidth of the Doppler signal component. The narrowband interference suppression device is coupled to the receiving device and is configured to perform interference suppression on the first digital signal to suppress the narrowband interference signal component in the first digital signal to generate an output digital signal.

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：US20240201357A1

公开(公告)日：2024-06-20

申请号：US18090521

申请日：2022-12-29

Applicant: RichWave Technology Corp.

Inventor： Chun-Hsien Hsiao

IPC: G01S13/42 ,  G01S7/35 ,  G01S7/41

CPC classification number: G01S13/42 ,  G01S7/356 ,  G01S7/41

Abstract: An object sensing method and a radar apparatus are provided. In the method, initial sensing data is obtained through a single antenna. The initial sensing data is generated according to an echo received by the single antenna. The initial sensing data includes sensing intensities of multiple time points. The initial sensing data is converted into pre-processing sensing data. The pre-processing sensing data includes a corresponding relationship between multiple distances and the sensing intensities at those time points. One or more feature parameters of the pre-processing sensing data are obtained. The feature parameters respond to the existence of one or more objects. Inertia of the feature parameter between those time points is determined. The inertia is a period when the object exists at those time points. The number of objects is determined according to inertia. Accordingly, the accuracy of number estimation is improved.