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公开(公告)号：US11456738B1
公开(公告)日：2022-09-27
申请号：US17494852
申请日：2021-10-06
Applicant: RichWave Technology Corp.
Inventor： Hang Chang , Chih-Sheng Chen
IPC: H03K17/687
Abstract: A switch device includes a signal input terminal and a switch circuit. The signal input terminal is used to receive a radio frequency signal. The switch circuit is coupled to the signal input terminal, and includes a first transistor and a second transistor. The first transistor includes a control terminal used to receive a first control voltage to turn off the first transistor; a first terminal; and a second terminal. The second transistor includes a control terminal used to receive a second control voltage to turn off the second transistor; a first terminal; and a second terminal. The second control voltage is different from the first control voltage.
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公开(公告)号：US20220200562A1
公开(公告)日：2022-06-23
申请号：US17692132
申请日：2022-03-10
Applicant: RichWave Technology Corp.
Inventor： Tsyr Shyang Liou
Abstract: A bulk acoustic wave (BAW) structure includes a single crystal piezoelectric material layer, a first electrode, a second electrode and an acoustic reflector. The first and second electrodes are respectively located on a first surface and a second surface of the single crystal piezoelectric material layer. The area of the second electrode is greater than or equal to that of the second surface of the single crystal piezoelectric material layer, and the contact area of the single crystal piezoelectric material layer with the second electrode is equal to the area of the second surface of the single crystal piezoelectric material layer. The acoustic reflector is disposed on a surface of the first electrode.
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公开(公告)号：US11316480B2
公开(公告)日：2022-04-26
申请号：US16904506
申请日：2020-06-17
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien
Abstract: An operational amplifier includes a voltage terminal; a common terminal; a first amplification stage for receiving a differential signal pair to generate a single-end amplification signal; a first buffer for generating a first voltage according to the single-end amplification signal; a first diode for reducing the first voltage to generate a second voltage; a second amplification stage for amplifying the second voltage to generate a third voltage; a voltage stabilizing circuit for stabilizing the third voltage; a second diode coupled between the second amplification stage and the common terminal; a second buffer for generating an output voltage according to the third voltage; and a current mirror coupled to the common terminal, the first amplification stage, the first diode and the second amplification stage.
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公开(公告)号：US11316474B1
公开(公告)日：2022-04-26
申请号：US17372548
申请日：2021-07-12
Applicant: RichWave Technology Corp.
Inventor： Po-Chih Ku , Tse-Peng Chen
IPC: H03D7/14
Abstract: A double-balanced mixer, including a coupling transformer, a first diode cascade circuit, a second diode cascade circuit, and a first set of coils, is provided. The coupling transformer receives a first input signal and generates at least one set of signals with opposite voltage phases. The first diode cascade circuit is coupled to the coupling transformer, and generates a first node voltage according to a first set of bias voltages. The second diode cascade circuit is coupled to the coupling transformer, and generates a second node voltage according to a second set of bias voltages. The first set of coils is coupled to the first and second diode cascade circuits, receives the first and second node voltages and a second input signal, and generates an output signal. The first node voltage is equal to the second node voltage.
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公开(公告)号：US11251764B2
公开(公告)日：2022-02-15
申请号：US16687700
申请日：2019-11-19
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
IPC: H03G3/30
Abstract: An amplification device includes an amplification circuit, an inductor, a regulator, and a impedance circuit. The amplification circuit has an input terminal for receiving a radio frequency signal, and an output terminal for outputting an amplified radio frequency signal. The inductor has a first terminal, and a second terminal coupled to the output terminal of the amplification circuit. The regulator is coupled to the first terminal of the inductor and generates a steady voltage and/or a steady current. The impedance circuit has a first terminal coupled to the output terminal of the amplification circuit, and a second terminal coupled to a first system voltage terminal. The impedance circuit provides a low frequency impedance path to suppress a beat frequency signal in the amplified radio frequency signal.
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Patent Agency Ranking
公开(公告)号：US20220038063A1
公开(公告)日：2022-02-03
申请号：US17219902
申请日：2021-04-01
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Yun-Jhu Lai
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：US20210399698A1
公开(公告)日：2021-12-23
申请号：US17086472
申请日：2020-11-02
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien
Abstract: A temperature compensation circuit for a power amplifier is provided, wherein data of circuit configurations corresponding to specific temperatures (including data associated with an output terminal voltage, a bias voltage, an adaptive bias, and a matching impedance of the power amplifier) for the power amplifier is stored in a read-only memory. Therefore, the temperature compensation circuit is capable of reading the data according to a temperature sensing signal to adjust the circuit configuration of the power amplifier accordingly, thereby, in a case of a constant input power of the power amplifier, an output power variance of the power amplifier is within a second interval (e.g., −10%˜+10%) when an environment temperature varies within a first interval. Therefore, the power amplifier has a stable gain.
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公开(公告)号：US11196393B2
公开(公告)日：2021-12-07
申请号：US17027728
申请日：2020-09-22
Applicant: RichWave Technology Corp.
Inventor： Ting-Yuan Cheng
IPC: G05F1/46 , G05F1/56 , H03K5/24 , H03F3/04 , H03K19/0175
Abstract: An amplifying apparatus and a voltage-to-current conversion apparatus are provided. The amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.
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公开(公告)号：US11146218B2
公开(公告)日：2021-10-12
申请号：US16709828
申请日：2019-12-10
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
Abstract: An amplification circuit includes an input terminal, an output terminal, a capacitor, a bias unit, an amplification unit, and an impedance unit. The input terminal receives a radio frequency signal. The capacitor is coupled to the input terminal and the bias unit. The bias unit includes a transistor for controlling the bias current. The transistor has a first terminal for receiving a system voltage, and a control terminal coupled to the reference voltage terminal. The amplification unit has an input terminal coupled to the capacitor and the bias unit, and an output terminal coupled to the output terminal of the amplification circuit. The impedance unit has a first terminal coupled to the bias unit, and a second terminal coupled to the input terminal of the amplification circuit and the capacitor. The impedance unit adjusts the amplifying linearity of the amplification circuit according to a selection signal.
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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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