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公开(公告)号：US20190068137A1
公开(公告)日：2019-02-28
申请号：US15892361
申请日：2018-02-08
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
CPC classification number: H03F1/523 , H03F1/52 , H03F3/19 , H03F3/195 , H03F3/211 , H03F3/213 , H03F3/245 , H03F2200/105 , H03F2200/21 , H03F2200/408 , H03F2200/451 , H03F2200/462 , H03F2200/78
Abstract: A protection circuit for use in an RF active circuit includes a signal strength detecting circuit, a current detecting circuit, a logic circuit, and a switching unit. The signal strength detecting circuit is coupled to the signal input end or the signal output end of the RF active circuit and configured to generate a first detecting signal according to the signal strength of the RF signal. The current detecting circuit is configured to detect the VSWR of the RF signal based on the driving current of the RF active circuit, thereby generating a corresponding second detecting signal. The logic circuit is configured to generate a switch control signal according to the first detecting signal and the second detecting signal. The switching unit is configured to lower the driving current of the RF active circuit according to the switch control signal.
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公开(公告)号：US20190386620A1
公开(公告)日：2019-12-19
申请号：US16439726
申请日：2019-06-13
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: A bias circuit includes a current sensor, a transistor, and a low pass filter circuit. The current sensor has a first terminal coupled to a voltage terminal, and a second terminal. The transistor has a first terminal coupled to the second terminal of the current sensor, a second terminal coupled to a radio frequency signal path for providing a bias signal, and a control terminal for receiving a reference voltage. The low pass filter circuit is coupled between the second terminal of the current sensor and the control terminal of the transistor.
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公开(公告)号：US11050392B2
公开(公告)日：2021-06-29
申请号：US16691497
申请日：2019-11-21
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: A bias device includes a transistor, a bias circuit, and an impedance unit. The transistor has a first terminal, a second terminal for providing a first bias voltage to an input terminal of an amplifier, and a control terminal. The bias circuit has a first terminal, a second terminal coupled to a first system voltage terminal for receiving a first system voltage, and a third terminal coupled to the control terminal of the first transistor for providing a second bias voltage to the control terminal of the first transistor. The impedance unit has a first terminal for receiving a first reference voltage, a second terminal coupled to the first terminal of the bias circuit. The first impedance unit adjusts the input impedance looking into the second terminal of the first transistor according to a frequency of a radio frequency signal received from the input terminal of the amplifier.
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Patent Agency Ranking
公开(公告)号：US10348254B2
公开(公告)日：2019-07-09
申请号：US15892361
申请日：2018-02-08
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: A protection circuit for use in an RF active circuit includes a signal strength detecting circuit, a current detecting circuit, a logic circuit, and a switching unit. The signal strength detecting circuit is coupled to the signal input end or the signal output end of the RF active circuit and configured to generate a first detecting signal according to the signal strength of the RF signal. The current detecting circuit is configured to detect the VSWR of the RF signal based on the driving current of the RF active circuit, thereby generating a corresponding second detecting signal. The logic circuit is configured to generate a switch control signal according to the first detecting signal and the second detecting signal. The switching unit is configured to lower the driving current of the RF active circuit according to the switch control signal.
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公开(公告)号：US20250167737A1
公开(公告)日：2025-05-22
申请号：US18393583
申请日：2023-12-21
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: An amplifier control circuit includes a first bias unit and a second bias unit. The first bias unit outputs a first current to a first amplifier. The first bias unit includes a primary bias circuit and a preheat signal generation circuit. The primary bias circuit receives an operational voltage signal, outputs the first current and outputs a detection signal. Change of the operational voltage signal is related to change of the detection signal. The preheat signal generation circuit generates a preheat control signal according to the change of the detection signal. The second bias circuit outputs a second current to a second amplifier. The second current in a first period is larger than the second current in a second period. The first period starts after the operational voltage signal starts to change, and the second period starts after the first period ends.
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公开(公告)号：US12028036B2
公开(公告)日：2024-07-02
申请号：US17395476
申请日：2021-08-06
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
CPC classification number: H03H7/0115 , H03F3/19 , H03H7/1766 , H03F2200/165 , H03F2200/451
Abstract: The present invention discloses an amplifier. The bias amplifier includes a signal input end, for inputting an input signal; a voltage input end, for inputting a source voltage; an amplifying circuit, for generating an amplified input signal according to the input signal, and the amplified input signal comprises a fundamental signal, a first harmonic signal and a second harmonic signal, wherein the first harmonic signal is a second order harmonic of the fundamental signal, and the second harmonic signal is a third order harmonic of the fundamental signal; a harmonic filter, coupled between the voltage input end and the amplifying circuit, for filtering the first harmonic signal and the second harmonic signal; and a signal output end, coupled to the harmonic filter, for outputting an output signal according to the amplified input signal.
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公开(公告)号：US20220360243A1
公开(公告)日：2022-11-10
申请号：US17395476
申请日：2021-08-06
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: The present invention discloses an amplifier. The bias amplifier includes a signal input end, for inputting an input signal; a voltage input end, for inputting a source voltage; an amplifying circuit, for generating an amplified input signal according to the input signal, and the amplified input signal comprises a fundamental signal, a first harmonic signal and a second harmonic signal, wherein the first harmonic signal is a second order harmonic of the fundamental signal, and the second harmonic signal is a third order harmonic of the fundamental signal; a harmonic filter, coupled between the voltage input end and the amplifying circuit, for filtering the first harmonic signal and the second harmonic signal; and a signal output end, coupled to the harmonic filter, for outputting an output signal according to the amplified input signal.
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公开(公告)号：US10958222B2
公开(公告)日：2021-03-23
申请号：US16439726
申请日：2019-06-13
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: A bias circuit includes a current sensor, a transistor, and a low pass filter circuit. The current sensor has a first terminal coupled to a voltage terminal, and a second terminal. The transistor has a first terminal coupled to the second terminal of the current sensor, a second terminal coupled to a radio frequency signal path for providing a bias signal, and a control terminal for receiving a reference voltage. The low pass filter circuit is coupled between the second terminal of the current sensor and the control terminal of the transistor.
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