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公开(公告)号：US11764736B2
公开(公告)日：2023-09-19
申请号：US17392205
申请日：2021-08-02
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
CPC classification number: H03F1/30 , H03F1/0261 , H03F3/04 , H03G3/10 , H03G3/30
Abstract: The present invention discloses a bias compensation circuit. The bias compensation circuit includes a detecting circuit, including a diode-connected transistor circuit, with a first end for receiving a first current, and a second end coupled to a first reference voltage end; and a first diode circuit, with a first end for receiving a second current, and a second end coupled to the first reference voltage end; wherein the detecting circuit provides a first voltage level according to the diode-connected transistor circuit, and provides a second voltage level according to the first diode circuit; a voltage-current converting circuit, coupled to the detecting circuit, for generating a first reference current according to the first voltage level and the second voltage level; and a bias circuit, coupled to the voltage-current converting circuit, for receiving the first reference current, to provide a bias voltage level according to the first reference current.
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公开(公告)号：US11742845B2
公开(公告)日：2023-08-29
申请号：US17565475
申请日：2021-12-30
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.
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公开(公告)号：US20230179194A1
公开(公告)日：2023-06-08
申请号：US17565475
申请日：2021-12-30
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.
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公开(公告)号：US20230123320A1
公开(公告)日：2023-04-20
申请号：US17542463
申请日：2021-12-05
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Yu-Hsiang Chu
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：US20230061516A1
公开(公告)日：2023-03-02
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.
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Patent Agency Ranking
86.发明申请公开(公告)号：US20220385241A1
公开(公告)日：2022-12-01
申请号：US17356467
申请日：2021-06-23
Applicant: RichWave Technology Corp.
Inventor： Tien-Yun Peng , Chih-Sheng Chen
Abstract: A power amplifier includes a transistor, a temperature sensor and a filter. The transistor is used to receive a bias signal and amplify a radio frequency (RF) signal. The temperature sensor is arranged in proximity to the transistor, and is used to detect a temperature of the transistor to provide a voltage signal at a control node accordingly. The filter is coupled to the temperature sensor and is used to filter the voltage signal to generate a filtered voltage. The bias signal is adjusted according to the filtered voltage.
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公开(公告)号：US11296732B2
公开(公告)日：2022-04-05
申请号：US16920739
申请日：2020-07-05
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
Abstract: A radio frequency signal transmission circuit includes a direct current blocking unit, a biasing impedance circuit, and a radio frequency element. The direct current blocking unit has a first terminal for receiving an input signal, and a second terminal coupled to a first bias voltage terminal. The biasing impedance circuit has a first terminal coupled to the first bias voltage terminal for providing a first bias voltage, and a second terminal coupled to a second bias voltage terminal for receiving a second bias voltage. The radio frequency element is coupled to the first bias voltage terminal, and receives and processes the input signal. When the biasing impedance circuit operates in a first mode, the biasing impedance circuit provides a first impedance. When the biasing impedance circuit operates in a second mode, the biasing impedance circuit provides a second impedance greater than the first impedance.
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公开(公告)号：US11199864B1
公开(公告)日：2021-12-14
申请号：US17138855
申请日：2020-12-30
Applicant: RichWave Technology Corp.
Inventor： Chia-Jung Yeh , Tien-Yun Peng , Chih-Sheng Chen
Abstract: A voltage controlled circuit includes a tracking circuit, an operational amplifier, a transistor, a feedback circuit and a sample and hold circuit. The tracking circuit generates an updated enabling voltage according to an enabling voltage, a sample enabling voltage and a sample reference voltage. The operational amplifier includes a first input terminal used to receive an input voltage, a second input terminal used to receive a feedback voltage, and an output terminal used to output a control voltage. The transistor includes a control terminal used to receive the control voltage, a first terminal used to receive a reference voltage, and a second terminal used to output a regulated voltage. The feedback circuit generates the feedback voltage according to the regulated voltage. The sample and hold circuit is used to sample the input voltage to generate the sample enabling voltage, and sample the feedback voltage to generate the sample reference voltage.
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公开(公告)号：US20210376823A1
公开(公告)日：2021-12-02
申请号：US16993218
申请日：2020-08-13
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tsung-Han Lee
Abstract: A switching circuit includes a first transmission terminal, a second transmission terminal, a third transmission terminal, and a variable impedance circuit. The first and the second transmission terminals coupled to a common node form a first transmission path. The third transmission terminal coupled to the common node forms a second transmission path with the first transmission terminal. The variable impedance circuit has a first terminal coupled between the common node and the third transmission terminal, and a second terminal coupled to a first reference potential terminal. When the first transmission path transmits a first signal, a first frequency bandwidth range provided by the variable impedance circuit is determined according to a first frequency of the first signal so that the variable impedance circuit provides low impedance in the first frequency bandwidth range, and the first frequency bandwidth range covers the first frequency.
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公开(公告)号：US11108366B2
公开(公告)日：2021-08-31
申请号：US16509450
申请日：2019-07-11
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
Abstract: An amplifier circuit includes an output terminal, an amplification unit and a switch. The output terminal is used to output an amplification signal. The amplification unit includes a first transistor and a second transistor. The first transistor includes a control terminal for receiving a first input signal, a first terminal coupled to the output terminal for outputting an amplified first input signal, and a second terminal. The second transistor includes a control terminal for receiving a second input signal, a first terminal coupled to the output terminal for outputting an amplified second input signal, and a second terminal. The switch includes a first terminal coupled to the second terminal of the first transistor, and a second terminal. The amplification signal is generated using at least the amplified first input signal and/or the amplified second input signal.
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