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151.发明公开公开(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
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.
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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
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.
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公开(公告)号：US20230327629A1
公开(公告)日：2023-10-12
申请号：US17849698
申请日：2022-06-26
Applicant: RichWave Technology Corp.
Inventor： Chin-Chia Chang , Shih-Meng Lin , Shih-Che Chen
CPC classification number: H03H3/08 , H03H9/14547 , H03H9/02992
Abstract: An acoustic wave device includes a piezoelectric substrate and a transducer. The piezoelectric substrate has a surface. The transducer is disposed on the surface. The transducer includes a first electrode, a second electrode, and at least one protrusion. The first electrode extends along a first direction and has a first end. The second electrode extends along the first direction and has a second end. The first electrode and the second electrode are spaced apart from each other along a second direction. The at least one protrusion is disposed at the first end of the first electrode. The at least one protrusion extends along the first direction and partially obstruct the first end.
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154.发明授权公开(公告)号：US11784672B2
公开(公告)日：2023-10-10
申请号：US17566399
申请日：2021-12-30
Applicant: Richwave Technology Corp.
Inventor： Shih-Kai Lin
CPC classification number: H04B1/38 , H01Q21/0037 , H01Q21/061
Abstract: A transceiver includes an antenna configured to transmit a first wireless signal based on a transmission signal and receive a second wireless signal, the second wireless signal including a reflected first wireless signal from an object and the antenna transmitting the first wireless signal and receiving the second wireless signal at the same time. A transmission circuit is configured to generate the transmission signal and output the transmission signal to a first side of the antenna. A reception circuit is configured to receive a reception signal from a second side of the antenna, the antenna outputting the reception signal based on the second wireless signal. The first side is different from the second side.
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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.
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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US11705725B2
公开(公告)日：2023-07-18
申请号：US17083323
申请日：2020-10-29
Applicant: RichWave Technology Corp.
Inventor： Chuan-Chen Chao , Ching-Yao Pai
CPC classification number: H02H9/046 , H01L27/0255 , H01L27/0266 , H01L27/0288
Abstract: An integrated circuit includes a signal pad, receiving an input signal during a normal mode, and receive an ESD signal during an ESD mode; an internal circuit, processing the input signal during the normal mode; a variable impedance circuit, comprising a first end coupled to the signal pad, a second end coupled to the internal circuit, wherein the variable impedance circuit provides a low or high impedance path between the signal pad and the internal circuit during the normal or ESD mode; and a switch circuit, comprising a first end coupled to a control end of the variable impedance circuit, a second end coupled to a reference voltage terminal, and a control end receiving a node voltage, wherein the switch circuit switches the control end of the variable impedance circuit to have a first specific voltage or be electrically floating during the normal or ESD mode.
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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
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.
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公开(公告)号：US20230184882A1
公开(公告)日：2023-06-15
申请号：US17557047
申请日：2021-12-21
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
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 according to the first wireless signal to suppress the narrowband interference signal component in the first digital signal to generate an output digital signal.
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