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公开(公告)号：US20210359646A1
公开(公告)日：2021-11-18
申请号：US17229809
申请日：2021-04-13
Applicant: RichWave Technology Corp.
Inventor： Pin-Yi Huang , Chih-Sheng Chen , Ching-Wen Hsu
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.
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公开(公告)号：US20210351749A1
公开(公告)日：2021-11-11
申请号：US17378802
申请日：2021-07-19
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu , Hsien-Wei Ke
Abstract: An amplifier circuit includes a first amplifier and a second amplifier. The first amplifier receives a first signal and generates a first amplification signal accordingly. The second amplifier receives a second signal and generates a second amplification signal accordingly. The first signal is related to a first frequency band, and the second signal is related to a second frequency band different from the first frequency band. When one of the first amplifier and the second amplifier is in use, the other one of the first amplifier and the second amplifier is unused. The first amplifier and second amplifier are coupled to a reference voltage terminal through a common node. The first amplifier includes a switch coupled between the common node and a stage of the first amplifier, and the switch can be controlled for reducing the loading effect caused by the first amplifier on the second amplifier.
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公开(公告)号：US11601100B2
公开(公告)日：2023-03-07
申请号：US16945916
申请日：2020-08-02
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien , Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
Abstract: The frequency detector includes a first impedance circuit and a second impedance circuit. The first impedance circuit has a first terminal for receiving an input signal, and a second terminal for outputting a divisional signal. The second impedance circuit has a first terminal coupled to the second terminal of the first impedance circuit, and a second terminal coupled to a first system voltage terminal. The frequency response of the first impedance circuit is different from a frequency response of the second impedance circuit. The resistance of the first impedance circuit, a resistance of the second impedance circuit, and the divisional signal change with a frequency of the input signal.
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公开(公告)号：US20170126017A1
公开(公告)日：2017-05-04
申请号：US15404215
申请日：2017-01-12
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
IPC: H02J4/00
CPC classification number: H02J4/00 , H03K17/693
Abstract: A switch device includes a common terminal and a selection circuit. The selection circuit includes a primary switch, a first secondary switch, and a second secondary switch. The primary switch includes a plurality of primary transistors coupled in series and is coupled to the common terminal. The first secondary switch is coupled to the primary switch and a first transmission terminal. The first secondary switch includes a plurality of first secondary transistors coupled in series. The second secondary switch is coupled to the primary switch and a second transmission terminal. The second secondary switch includes a plurality of second secondary transistors coupled in series. The number of the first secondary transistors and the number of the second secondary transistors are both greater than or equal to the number of the primary transistors.
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公开(公告)号：US12113495B2
公开(公告)日：2024-10-08
申请号：US17499831
申请日：2021-10-12
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
CPC classification number: H03F3/505 , H03F3/45179 , H03F1/12 , H03F2200/387
Abstract: An amplifier circuit having an adjustable gain is provided. The amplifier circuit includes an input terminal, an output terminal, an amplifier, and an attenuation circuit. The input terminal receives an input signal, which is in turn received by an input terminal of the amplifier. An output terminal of the amplifier outputs the input signal that is amplified. The attenuation circuit is coupled between the output terminal of the amplifier and the output terminal to provide a plurality of attenuation to the input signal that is amplified and generate a first attenuation signal, or between the input terminal and the output terminal to provide the plurality of attenuations to the input signal and generate a second attenuation signal. A difference between an impedance value of the input terminal of the attenuation circuit and an impedance value of the output terminal of the attenuation circuit is within a predetermined range.
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Patent Agency Ranking
公开(公告)号：US12040757B2
公开(公告)日：2024-07-16
申请号：US17378802
申请日：2021-07-19
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu , Hsien-Wei Ke
CPC classification number: H03F3/211 , H03F3/72 , H03F1/565 , H03F2200/111 , H03F2200/222 , H03F2200/372 , H03F2200/387 , H03F2203/7209
Abstract: An amplifier circuit includes a first amplifier and a second amplifier. The first amplifier receives a first signal and generates a first amplification signal accordingly. The second amplifier receives a second signal and generates a second amplification signal accordingly. The first signal is related to a first frequency band, and the second signal is related to a second frequency band different from the first frequency band. When one of the first amplifier and the second amplifier is in use, the other one of the first amplifier and the second amplifier is unused. The first amplifier and second amplifier are coupled to a reference voltage terminal through a common node. The first amplifier includes a switch coupled between the common node and a stage of the first amplifier, and the switch can be controlled for reducing the loading effect caused by the first amplifier on the second amplifier.
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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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公开(公告)号：US20210091727A1
公开(公告)日：2021-03-25
申请号：US16945916
申请日：2020-08-02
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien , Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
Abstract: The frequency detector includes a first impedance circuit and a second impedance circuit. The first impedance circuit has a first terminal for receiving an input signal, and a second terminal for outputting a divisional signal. The second impedance circuit has a first terminal coupled to the second terminal of the first impedance circuit, and a second terminal coupled to a first system voltage terminal. The frequency response of the first impedance circuit is different from a frequency response of the second impedance circuit. The resistance of the first impedance circuit, a resistance of the second impedance circuit, and the divisional signal change with a frequency of the input signal.
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公开(公告)号：US20200162031A1
公开(公告)日：2020-05-21
申请号：US16386293
申请日：2019-04-17
Applicant: RichWave Technology Corp.
Inventor： Jhao-Yi Lin , Chih-Sheng Chen , Ching-Wen Hsu
Abstract: An amplification device includes an amplification circuit and a protection circuit. The amplification circuit includes a transistor having a first terminal for outputting an amplified radio frequency signal, a second terminal, and a control terminal coupled to the input terminal of the amplification circuit for receiving a radio frequency signal to be amplified. The protection circuit has a first terminal coupled to the output terminal or the input terminal of the amplification circuit, and a second terminal. The protection circuit includes a switch and a first voltage clamping unit. The switch unit is turned on or turned off according to a control signal. The first voltage clamping unit is coupled to the switch unit for clamping a voltage at the first terminal of the protection circuit within a predetermined region when the switch unit is turned on.
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公开(公告)号：US10340704B2
公开(公告)日：2019-07-02
申请号：US15404215
申请日：2017-01-12
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
IPC: H03K17/16 , H04B1/44 , H01P1/15 , H02J4/00 , H03K17/693
Abstract: A switch device includes a common terminal and a selection circuit. The selection circuit includes a primary switch, a first secondary switch, and a second secondary switch. The primary switch includes a plurality of primary transistors coupled in series and is coupled to the common terminal. The first secondary switch is coupled to the primary switch and a first transmission terminal. The first secondary switch includes a plurality of first secondary transistors coupled in series. The second secondary switch is coupled to the primary switch and a second transmission terminal. The second secondary switch includes a plurality of second secondary transistors coupled in series. The number of the first secondary transistors and the number of the second secondary transistors are both greater than or equal to the number of the primary transistors.
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