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公开(公告)号：US11677361B2
公开(公告)日：2023-06-13
申请号：US17143160
申请日：2021-01-07
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching Wen Hsu
CPC classification number: H03F3/19 , H03F2200/129 , H03F2200/372 , H03F2200/451 , H04B1/40
Abstract: The invention provides a radio frequency (RF) amplifier apparatus including an amplifier and a resonance circuit. An input terminal of the amplifier receives an RF signal. The amplifier amplifies a first frequency component of the RF signal and outputs the amplified first frequency component to an output terminal of the amplifier. A first terminal and a second terminal of the resonance circuit are respectively coupled to the input terminal and the output terminal of the amplifier. The resonance circuit provides a low impedance path for a second frequency component of the RF signal between the input terminal and the output terminal of the amplifier, and provides a high impedance path for the first frequency component of the RF signal between the input terminal and the output terminal of the amplifier.
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132.发明授权公开(公告)号：US11569784B2
公开(公告)日：2023-01-31
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：US11539332B2
公开(公告)日：2022-12-27
申请号：US17140135
申请日：2021-01-04
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
Abstract: An amplification circuit includes a switch circuit, an amplifier, and a control circuit. The switch circuit has a first terminal coupled to a radio frequency signal input terminal or a system voltage terminal, a second terminal coupled to an input terminal of the amplifier, and a control terminal configured to receive a control signal. The amplifier amplifies a radio frequency signal. The control circuit generates the control signal according to a driving current generated by the amplifier. When the control circuit determines that the amplifier operates in a high power mode, the control circuit controls the control signal to adjust a conducting level between the first terminal and the second terminal of the switch circuit according to the intensity of the driving current.
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公开(公告)号：US11536614B2
公开(公告)日：2022-12-27
申请号：US17246734
申请日：2021-05-03
Applicant: RichWave Technology Corp.
Inventor： Po-Wei Wu , Tien-Yun Peng , Chih-Sheng Chen
Abstract: A temperature detector is used to detect a temperature of a circuit under test, and includes a temperature coefficient component, a multiplier, an impedance component and a node. The temperature coefficient component is arranged in proximity to the circuit under test. A control terminal of the multiplier is coupled to a second terminal of the temperature coefficient component. The impedance component is coupled between the second terminal of the temperature coefficient component and the control terminal of the multiplier, or between a second terminal of the multiplier and a third voltage terminal. The node is formed between the second terminal of the temperature coefficient component and the control terminal of the multiplier. A voltage at the node and an amplified detection current flowing to a first terminal of the multiplier are positively correlated to the temperature of the circuit under test.
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公开(公告)号：US20220350359A1
公开(公告)日：2022-11-03
申请号：US17392205
申请日：2021-08-02
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
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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Patent Agency Ranking
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：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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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：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：US10778158B2
公开(公告)日：2020-09-15
申请号：US16233012
申请日：2018-12-26
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
Abstract: A control circuit with a bypass function includes a first signal terminal, a second signal terminal, an output terminal, a first switch unit to a fourth switch unit, an output switch unit and a bypass unit. The first signal terminal is used for receiving a first signal. The second signal terminal is used for receiving a second signal. The first switch unit is coupled to the first signal terminal. The second switch unit is coupled between the first switch unit and the output switch unit. The third switch unit is coupled to the second signal terminal. The fourth switch unit is coupled between the third switch unit and the output switch unit. The output switch unit is coupled between the second switch unit and the output terminal. The bypass unit is coupled between the first switch unit and the output terminal to provide a bypass path corresponding to the first signal.
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