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公开(公告)号：US20200169258A1
公开(公告)日：2020-05-28
申请号：US16691503
申请日：2019-11-21
Applicant: RichWave Technology Corp.
Inventor： Tien-Yun Peng , Chih-Sheng Chen
IPC: H03K19/0185 , H03K3/037
Abstract: A driving apparatus is provided. A first stage inverter circuit and a second stage inverter circuit respectively generate a first output signal and a second output signal according to a first voltage dividing control signal and a second voltage dividing control signal, wherein the first output signal and the second output signal are respectively output to the second-stage inverter circuit and the first-stage inverter circuit to appropriately control the gate voltages of transistors of pull-up circuit and the pull-down circuit in the first-stage inverter circuit and the second-stage inverter circuit, so that source-drain voltages differences of the transistors can be more evenly distributed.
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公开(公告)号：US20200083850A1
公开(公告)日：2020-03-12
申请号：US16233012
申请日：2018-12-26
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
IPC: H03F3/21
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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公开(公告)号：US10574196B2
公开(公告)日：2020-02-25
申请号：US16153805
申请日：2018-10-07
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ming-Shiuan Wen
Abstract: A power amplifier device includes a first amplifier, a second amplifier, a capacitor, a node, and an impedance matching circuit. The second amplifier amplifies a radio frequency signal transmitted from the first amplifier. The capacitor is coupled between an output terminal of the first amplifier and an input terminal of the second amplifier. The node is disposed between the input terminal of the second amplifier and the capacitor. The impedance matching circuit is coupled to the node and a common voltage terminal. The impedance matching circuit is substantially an open circuit at a center frequency of the radio frequency signal. The impedance matching circuit provides substantially a short-circuited path from the node to the common voltage terminal at a frequency twice the center frequency.
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公开(公告)号：US20200059199A1
公开(公告)日：2020-02-20
申请号：US16273077
申请日：2019-02-11
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
Abstract: An amplification circuit includes an input terminal for receiving a radio frequency input signal, an output terminal for outputting an amplified radio frequency signal, a bias circuit for providing a bias voltage, an impedance circuit, a transistor, and a filter circuit. The impedance circuit is coupled to the bias circuit and the input terminal, and provides a voltage drop between the first terminal and the second terminal of the impedance circuit. The first transistor has a first terminal coupled to the output terminal, a second terminal coupled to a first reference voltage terminal, and a control terminal coupled to the impedance circuit and for receiving the radio frequency input signal. The filter circuit is coupled to the first transistor and the impedance circuit, filters out a harmonic signal, and provides a feedback signal including a primary frequency signal of the amplified radio frequency signal to the impedance circuit.
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公开(公告)号：US20190319590A1
公开(公告)日：2019-10-17
申请号：US16452549
申请日：2019-06-26
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Pei-Chuan Hsieh
Abstract: A predistorter has a first capacitor, a first bias input circuit, a second bias input circuit, a second capacitor and an impedance conversion circuit. A first end of the first capacitor is coupled to a first node of the amplifier. The impedance conversion circuit has a first resistor and a field-effect transistor (FET) and is used to perform an impedance conversion to provide a variable capacitance. A gate of the FET is coupled to an output end of the first bias input circuit, one of a source and a drain of the FET is coupled to a second end of the first capacitor and a first end of the first resistor, and another of the source and the drain of the FET is coupled to an output end of the second bias input circuit, first end of the second capacitor and a second end of the first resistor.
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Patent Agency Ranking
公开(公告)号：US10447215B2
公开(公告)日：2019-10-15
申请号：US15862598
申请日：2018-01-04
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
Abstract: A current compensation circuit for providing a current to an amplifier circuit includes a first amplifier, a first transistor and a first bias circuit. The first bias circuit provides a first bias current to the first amplifier. The current compensation circuit includes a power detection circuit, an operational amplifier circuit and a current-to-voltage converter. The power detection circuit detects and converts an input power or an output power of the first amplifier to a first detection voltage. The operational amplifier circuit generates a second detection voltage according to the first detection voltage and a calibration voltage. The current-to-voltage converter converts the second detection voltage to a compensation current. A first compensation current flows to the first amplifier through the first transistor according to the compensation current, such that the first amplifier is driven by the first bias current plus the first compensation current.
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公开(公告)号：US10326412B2
公开(公告)日：2019-06-18
申请号：US16008054
申请日：2018-06-14
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
Abstract: An amplifier includes an input terminal for receiving an input signal, an output terminal for outputting an output signal, a first transistor, a second transistor having a first terminal coupled to a second terminal of the first transistor, a third transistor having a first terminal coupled to a second terminal of the second transistor, a capacitor coupled between a control terminal and a second terminal of the third transistor, a bias circuit coupled to the first terminal of the third transistor for providing a bias voltage to the third transistor, a fourth transistor having a first terminal coupled to the input terminal and a second terminal coupled to the output terminal for providing a bypass path, and a fifth transistor having a first terminal coupled to the first terminal of the first transistor and a second terminal coupled to the output terminal.
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公开(公告)号：US20190165743A1
公开(公告)日：2019-05-30
申请号：US16264701
申请日：2019-02-01
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
CPC classification number: H03F1/565 , H01F27/2804 , H01F2019/085 , H01F2027/2809 , H03F3/195 , H03F3/211 , H03F3/45475 , H03F2200/387 , H03F2200/451 , H03F2200/537 , H03F2200/541 , H03F2203/45731
Abstract: A transformer has a first winding, a second winding, a third winding, a fourth winding and a fifth winding. The fifth winding has a first part and a second part serially connected to the first part. The first part is magnetically coupled to the second winding and magnetically isolated from the first winding, and the second part is magnetically coupled to the fourth winding and magnetically isolated from the third winding. The second winding is positioned between the first winding and the first part, the first winding is positioned adjacent to the second winding, and the second winding is positioned adjacent to the first part. The fourth winding is positioned between the third winding and the second part, the third winding is positioned adjacent to the fourth winding, and the fourth winding is positioned adjacent to the second part.
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公开(公告)号：US20190163220A1
公开(公告)日：2019-05-30
申请号：US16191355
申请日：2018-11-14
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
Abstract: A power supply device includes an input terminal, a regulated voltage output terminal, a switch, a first transistor, and a current split circuit. The input terminal receives a first control voltage. The regulated voltage output terminal outputs an output voltage. The switch has a first terminal coupled to the input terminal, a second terminal, and a control terminal. The first transistor has a first terminal coupled to a voltage terminal, a second terminal coupled to the regulated voltage output terminal, and a control terminal coupled to the second terminal of the switch. The current split circuit is coupled to the voltage terminal and the regulated voltage output terminal. The current split circuit receives the first control voltage or a second control voltage, and includes a second transistor coupled between the voltage terminal and the regulated voltage output terminal.
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公开(公告)号：US20190123747A1
公开(公告)日：2019-04-25
申请号：US16111238
申请日：2018-08-24
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
IPC: H03K19/003
CPC classification number: H03K19/00315 , H03K19/0013 , H03K19/0016 , H03K19/003 , H03K19/017 , H03K19/01707 , H03K19/20
Abstract: An inverter includes a first system voltage terminal, a second system voltage terminal, an output terminal, a plurality of P-type transistors, a plurality of N-type transistors, and a voltage drop impedance element. The first system voltage terminal receives a first voltage, and the second system voltage terminal receives a second voltage. The plurality of P-type transistors are coupled in series between the first system voltage terminal and the output terminal. The plurality of N-type transistors are coupled in series between the output terminal and the second system voltage terminal. The voltage drop impedance element is coupled in parallel with a first N-type transistor of the plurality of N-type transistors, and the impedance of the voltage drop impedance element is smaller than the impedance of the first N-type transistor when the first N-type transistor is turned off.
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