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公开(公告)号：US11899048B2
公开(公告)日：2024-02-13
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：US11764775B2
公开(公告)日：2023-09-19
申请号：US17496766
申请日：2021-10-08
Applicant: RichWave Technology Corp.
Inventor： Chun-Hao Wei , Chih-Sheng Chen
IPC: H03K17/56
CPC classification number: H03K17/56
Abstract: The switch device includes a first circuit. The first circuit has a first end coupled between a first terminal and a second terminal, and the first circuit has the second end coupled between the first terminal and the second terminal or coupled to a third terminal. The first circuit includes a first switch and a second switch. The first switch is coupled between the first end and the second end of the first circuit and is turned on or off according to a first control signal. The second switch is connected to the first switch in parallel and is turned on or off according to a second control signal. The first switch and the second switch include transistors of the same type. In a surge protection mode, the second switch is turned on to dissipate the surge current.
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公开(公告)号：US11757416B2
公开(公告)日：2023-09-12
申请号：US17219902
申请日：2021-04-01
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Yun-Jhu Lai
CPC classification number: H03F1/56 , H03F3/195 , H03F2200/105 , H03F2200/318 , H03F2200/451
Abstract: A matching circuit includes an input terminal, an output terminal, a first impedance component, a first set of switching devices, a second impedance component, a second set of switching devices and a controller. The first impedance component includes a first terminal coupled between the input terminal and the output terminal, and a second terminal. The first set of switching devices is coupled to the second terminal of the first impedance component, the controller and a reference terminal. The second impedance component includes a first terminal coupled between the second terminal of the first impedance component and the first set of switching devices, and a second terminal. The second set of switching devices is coupled to the second terminal of the second impedance component, the controller and the reference terminal. The controller controls the first set of switch devices and the second set of switch devices according to a detection signal.
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公开(公告)号：US11703532B2
公开(公告)日：2023-07-18
申请号：US17495825
申请日：2021-10-07
Applicant: RichWave Technology Corp.
Inventor： Po-Wei Wu , Hsiang-Jen Jao , Chih-Sheng Chen , Tien-Yun Peng
IPC: G01R29/00 , G01R29/027
CPC classification number: G01R29/0273
Abstract: A device of measuring a duty cycle 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 control circuit is coupled to the resistor-capacitor circuit, and configured to acquire an ON-time according to the first voltage, the second voltage and the third voltage. The ON-time is a time interval during which the reference signal is in the first state.
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公开(公告)号：US20230163738A1
公开(公告)日：2023-05-25
申请号：US18090455
申请日：2022-12-28
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
CPC classification number: H03G3/30 , H03F3/04 , H03G2201/103 , H03F1/56
Abstract: An amplifier circuit includes an amplifier for generating an amplified input signal according to an input signal, and an attenuator circuit coupled to the amplifier. The attenuator circuit includes an input terminal for receiving the input signal or the amplified input signal, an output terminal, a reference voltage terminal, a zeroth resistor-switch circuit, a first resistor-switch circuit, and a second resistor-switch circuit. The zeroth resistor-switch circuit includes a first terminal coupled to the input terminal, a second terminal coupled to the output terminal, a zeroth switch coupled to the first terminal of the zeroth resistor-switch circuit and the second terminal of the zeroth resistor-switch circuit, a zeroth resistor coupled between the first terminal of the zeroth resistor-switch circuit and the second terminal of the zeroth resistor-switch circuit, a first resistor coupled between the zeroth resistor and the second terminal of the zeroth resistor-switch circuit, and a first switch.
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Patent Agency Ranking
公开(公告)号：US20230136392A1
公开(公告)日：2023-05-04
申请号：US17555526
申请日：2021-12-20
Applicant: RichWave Technology Corp.
Inventor： Chia-Wei Hsu , Chih-Sheng Chen , Yu-Hsuan Chao
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：US20230058738A1
公开(公告)日：2023-02-23
申请号：US17551127
申请日：2021-12-14
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng , Hsien-Huang Tsai
IPC: H03K3/01
Abstract: A driving circuit includes a first reference terminal, a second reference terminal, at least one input terminal, an output terminal, a first transistor, a second transistor, a switch module, and at least one control signal terminal. The at least one input terminal receives at least one input signal. The output terminal outputs an output signal in response to the at least one input signal. The first transistor and the second transistor respectively include control terminals coupled to the at least one input terminal. The switch module includes at least one control terminal coupled to the at least one control signal terminal to receive at least one control signal. The at least one input signal has a transition period. The switch module can be turned off according to the at least one control signal.
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公开(公告)号：US11539362B1
公开(公告)日：2022-12-27
申请号：US17565395
申请日：2021-12-29
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Pei-Chuan Hsieh , Tsung-Han Lee
IPC: H03K17/687 , H03K17/16
Abstract: A radio frequency (RF) switch includes a first terminal, a second terminal, a series switch circuit, a shunt switch circuit, an inductor and a reference voltage terminal. An RF signal at the first terminal. The series switch circuit is coupled to the first terminal, the second terminal, and the shunt switch circuit. The shunt switch circuit includes a sub-switch circuit, a transistor coupled to the sub-switch circuit, and a compensation capacitor parallel-coupled to the transistor. The inductor is coupled to the shunt switch circuit and the reference voltage terminal. When the RF signal is operated in a first frequency band, the first transistor is turned on for the shunt switch circuit and the inductor to provide a first impedance. When the RF signal is operated in a second frequency band, the first transistor is turned off for the shunt switch circuit and the inductor to provide a second impedance.
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公开(公告)号：US11411539B2
公开(公告)日：2022-08-09
申请号：US17093504
申请日：2020-11-09
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng , Hung-Chia Lo
Abstract: An amplifier device includes an amplifying unit and a bias module. The amplifying unit has a first end coupled to a voltage source configured to receive a source voltage, a second end configured to receive an input signal, and a third end coupled to a first reference potential terminal configured to receive a first reference potential. The first end of the amplifying unit is configured to output an output signal amplified by the amplifying unit. The bias module is coupled to the second end of the amplifying unit, and configured to receive a voltage signal to generate a bias current according to a first counter-gradient and a second counter-gradient, and provide the bias current to the amplifying unit. The voltage signal is a variable voltage. A supply current flowing into the amplifying unit and is adjusted in accordance with the voltage signal to stay within a predetermined range.
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公开(公告)号：US20220209757A1
公开(公告)日：2022-06-30
申请号：US17411068
申请日：2021-08-25
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Yu-Hsiang Chu
IPC: H03K5/1252 , G05F1/56
Abstract: A radio frequency (RF) device and a voltage generation and harmonic suppressor thereof are provided. The RF device includes the voltage generation and harmonic suppressor and a RF circuit. The voltage generation and harmonic suppressor is configured to receive a RF signal to output at least one direct current (DC) voltage related to the RF signal, and configured to suppress a harmonic generated by the RF signal in the voltage generation and harmonic suppressor. The RF circuit is configured to receive the RF signal, and configured to perform an operation according to the at least one DC voltage.
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