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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：US11073853B2
公开(公告)日：2021-07-27
申请号：US15792786
申请日：2017-10-25
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chia-Jung Yeh
Abstract: A power supply includes a voltage regulator, a transistor, a current-to-voltage transform circuit, and a comparator. The voltage regulator receives a control signal, a source voltage, and a control voltage, and outputs a supply voltage according to the control voltage and the control signal. The transistor has a first terminal receiving the source voltage, and a control terminal coupled to the voltage regulator. The current-to-voltage transform circuit has a first terminal coupled to a second terminal of the transistor, a second terminal for receiving a reference voltage. The comparator has a first input terminal for receiving a comparison signal, a second input terminal coupled to the first terminal of the current-to-voltage transform circuit, and an output terminal for outputting the control voltage.
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公开(公告)号：US20210119651A1
公开(公告)日：2021-04-22
申请号：US16997955
申请日：2020-08-20
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Hsien-Huang Tsai
Abstract: A radio frequency device and a voltage generating device thereof are provided. The voltage generating device includes a first transistor, a second transistor, and a voltage dividing circuit. A first terminal of the first transistor receives a first voltage. A first terminal of the second transistor receives a second voltage. A first connection terminal and a second connection terminal of the voltage dividing circuit are respectively coupled to second terminals of the first transistor and the second transistor. The voltage dividing circuit generates a first divided voltage and a second divided voltage. The first divided voltage is used as an output voltage of the voltage generating device. The second divided voltage is output as a control voltage to a control terminal of the first transistor and a control terminal of the second transistor.
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公开(公告)号：US10862435B2
公开(公告)日：2020-12-08
申请号：US16293666
申请日：2019-03-06
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Hung-Chia Lo , Tien-Yun Peng
Abstract: An impedance circuit includes a first impedance terminal, a second impedance terminal, a first transistor, a second transistor, a low frequency signal blocking element, and a current-voltage transform circuit. The first transistor is coupled to the first impedance terminal, and controlled by a first voltage. The second transistor is coupled to the first impedance terminal, and controlled by a second voltage. The low frequency signal blocking element is coupled to the first transistor and the second impedance terminal. The current-voltage transform circuit is coupled to the first impedance terminal. The current-voltage transform circuit adjusts a terminal voltage at the first terminal of the current-voltage transform circuit according to a current flowing through the current-voltage transform circuit. The impedance circuit provides impedance between the first and the second impedance terminals according to the terminal voltage and the first voltage.
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公开(公告)号：US20200186101A1
公开(公告)日：2020-06-11
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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Patent Agency Ranking
公开(公告)号：US20200099339A1
公开(公告)日：2020-03-26
申请号：US16697195
申请日：2019-11-27
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng , Hung-Chia Lo
Abstract: An amplifier device comprises an amplifying unit and a bias module. The amplifying unit has a first end coupled to a voltage source configured to receive a source voltage, a second end configured to receive an input signal, and a third end coupled to a first reference potential terminal configured to receive a first reference potential. The first end of the amplifying unit is configured to output an output signal amplified by the amplifying unit. The bias module is coupled to the second end of the amplifying unit, and configured to receive a voltage signal to provide a bias current to the amplifying unit. The voltage signal is a variable voltage. A supply current flowing into the amplifying unit and is adjusted in accordance with the voltage signal to stay within a predetermined range.
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公开(公告)号：US20190356283A1
公开(公告)日：2019-11-21
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：US10416696B2
公开(公告)日：2019-09-17
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：US10353421B2
公开(公告)日：2019-07-16
申请号：US15810148
申请日：2017-11-13
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng
Abstract: A current mirror device includes an input end for receiving an input signal, an output end for outputting an amplified signal of the input signal, first through third transistors, and an operational amplifier. The first transistor includes a first end coupled to first reference current and a second end coupled to a bias voltage. The control end of the second transistor is coupled to the input end. The third transistor includes a first end coupled to the output end, a second end coupled to the first end of the second transistor and a control end coupled to a reference voltage. The operational amplifier is configured to keep a first voltage and a second voltage at substantially the same level, wherein the first voltage is obtained on the first end of the first transistor and the second voltage is obtained on the first end of the second transistor. Therefore, the reference current flowing through the first transistor can be accurately amplified to a desired value and mirrored to become load current flowing through the second transistor.
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公开(公告)号：US20190199220A1
公开(公告)日：2019-06-27
申请号：US16290975
申请日：2019-03-04
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tien-Yun Peng , Hsien-Huang Tsai
Abstract: A voltage generator includes an oscillator, a charge pump, a smoothing capacitor, and a driving controller. The oscillator has an output. The charge pump has an input and an output, and the input of the charge pump is coupled to the output of the oscillator. The smoothing capacitor is coupled to the output of the charge pump. The driving controller is coupled to the oscillator, and generates an enable signal to adjust an operation frequency of the oscillator. The voltage generator supplies a driving voltage to a switch for driving the switch via the smoothing capacitor. The driving controller generates the enable signal according to the driving voltage.
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