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公开(公告)号：US11552612B2
公开(公告)日：2023-01-10
申请号：US17123637
申请日：2020-12-16
申请人： DAIHEN Corporation
发明人： Tatsuya Morii
摘要： A high frequency power supply alternately outputs a first AC voltage and a second AC voltage to a plasma generator. The amplitudes of the first AC voltage and the second AC voltage are different from each other. An impedance adjustment device is disposed in midway of the transmission line of the first AC voltage and the second AC voltage. When the AC voltage output from the high frequency power supply is switched to a first AC voltage, a microcomputer changes the capacitance of a variable capacitor circuit to a first target value. When the AC voltage output from the high frequency power supply is switched to a second AC voltage, the microcomputer changes the capacitance of the variable capacitor circuit to a second target value.
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公开(公告)号：US20210203300A1
公开(公告)日：2021-07-01
申请号：US17123637
申请日：2020-12-16
申请人： DAIHEN Corporation
发明人： Tatsuya Morii
摘要： A high frequency power supply alternately outputs a first AC voltage and a second AC voltage to a plasma generator. The amplitudes of the first AC voltage and the second AC voltage are different from each other. An impedance adjustment device is disposed in midway of the transmission line of the first AC voltage and the second AC voltage. When the AC voltage output from the high frequency power supply is switched to a first AC voltage, a microcomputer changes the capacitance of a variable capacitor circuit to a first target value. When the AC voltage output from the high frequency power supply is switched to a second AC voltage, the microcomputer changes the capacitance of the variable capacitor circuit to a second target value.
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公开(公告)号：US20200343873A1
公开(公告)日：2020-10-29
申请号：US16844791
申请日：2020-04-09
申请人： Palstar, Inc.
发明人： Paul Hrivnak , John L. Keith , Paul N. Katz
摘要： Automatic impedance matching measures the RF source frequency and RF load voltage, current and phase to determine a single match solution for a capacitive value of the variable capacitor and an inductive value for the variable inductor, and whether a shunt reactance is coupled to the RF source or RF load. Once the capacitance and inductance values for a match solution are determined they are contemporaneously selected without any iterative searching necessary for the match solution.
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公开(公告)号：US20190165747A1
公开(公告)日：2019-05-30
申请号：US16239111
申请日：2019-01-03
IPC分类号： H03F3/72 , G05F1/565 , H02M3/158 , H03F1/02 , H03H11/30 , H03F3/217 , H03G3/30 , H03F1/56 , H01L29/06 , G05F1/46 , G05F1/575 , H03F1/34 , H03F3/19 , H03F3/21 , H04B1/40 , H03F3/195 , H03F3/24 , H03K17/687 , H01L27/092
摘要： Apparatus and methods for regulated voltage distribution are disclosed. Distribution elements can pass a regulated voltage provided by a single voltage regulator to thereby distribute the regulated voltage. A distribution element of the distribution elements can be included in a feedback path that provides a feedback signal to an input of the voltage regulator. The voltage regulator can be a low dropout voltage regulator, for example. The regulated voltage can be used in a variety of applications, for example, as a bias voltage for a power amplifier.
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公开(公告)号：US20190140867A1
公开(公告)日：2019-05-09
申请号：US15975821
申请日：2018-05-10
发明人： SHIH-HUNG WANG , SHEN-KUO HUANG , GERCHIH CHOU , WEN-SHAN WANG
CPC分类号： H04L25/0278 , G06F13/16 , G06F13/1668 , G06F13/4086 , G11C7/1057 , G11C7/222 , G11C16/26 , H03H7/40 , H03H11/30 , H05K1/141
摘要： A memory controller adjusts impedance matching of an output terminal and outputs a control signal that controls a memory through the output terminal. The memory controller includes a first driving and impedance matching circuit, a second driving and impedance matching circuit, and a logic circuit. The logic circuit, which is coupled to the first driving and impedance matching circuit and the second driving and impedance matching circuit, sets a first impedance and a first driving capability of the first driving and impedance matching circuit, sets a second impedance and a second driving capability of the second driving and impedance matching circuit, and enables the first driving and impedance matching circuit to cause the control signal to have a first level or enables the second driving and impedance matching circuit to cause the control signal to have a second level different from the first level.
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公开(公告)号：US10250076B2
公开(公告)日：2019-04-02
申请号：US15458971
申请日：2017-03-15
摘要： A wireless power transmitter that supplies power to a load. The wireless power transmitter includes an inverter, a voltage phase detector, a current phase detector, a phase difference counter, a controller and an impedance tuning circuit. The phase difference counter counts a phase difference between the voltage phase and the current phase at the output port of the inverter. The controller receives the phase difference from the phase difference counter and generates a control signal that changes an output impedance of the inverter in response to changes of a varying impedance of the load that is coupled with the output port of the inverter wirelessly. The impedance tuning circuit receives the control signal from the controller and tunes an imaginary part of the output impedance of the inverter to zero in order to maximize a power transfer efficiency from the wireless power transmitter to the load.
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公开(公告)号：US20180138895A1
公开(公告)日：2018-05-17
申请号：US15694550
申请日：2017-09-01
发明人： KAI-YIN LIU , HUI-MIN HUANG
摘要： The present invention discloses a resistance calibration circuit. An embodiment of the resistance calibration circuit includes: a reference voltage outputting circuit operable to output a reference voltage; an adjustable internal resistor including at least one positive temperature coefficient resistor and at least one negative temperature coefficient resistor; a reference current generating circuit operable to generate an internal resistor reference current according to the reference voltage and the internal resistor and generate an external resistor reference current according to the reference voltage and an external resistor; and a comparison and control circuit operable generate a comparison result according to the internal and external resistor reference currents, and adjust the internal resistor according to the comparison result till the comparison result indicates that the difference between the internal and external resistor reference currents is less than a predetermined threshold or unable to be further reduced.
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8.发明授权公开(公告)号：US09966930B2
公开(公告)日：2018-05-08
申请号：US15299800
申请日：2016-10-21
发明人： Frédéric Broyde , Evelyne Clavelier
CPC分类号： H03H11/30 , H01Q5/50 , H03F1/02 , H03F3/24 , H03H7/40 , H04B1/0458 , H04B1/0475 , H04B1/18 , H04B7/0413 , H04B2001/045
摘要： The invention relates to a method for automatically adjusting a multiple-input-port and multiple-output-port tuning unit, for instance a multiple-input-port and multiple-output-port tuning unit coupled to the antennas of a radio transceiver using a plurality of antennas simultaneously. An automatic tuning system using this method has 4 user ports and 4 target ports, and comprises: 4 sensing units; a signal processing unit, the signal processing unit estimating real quantities depending on an impedance matrix seen by the target ports, using sensing unit output signals, the signal processing unit delivering a tuning instruction; a multiple-input-port and multiple-output-port tuning unit comprising adjustable impedance devices; and a tuning control unit receiving the tuning instruction and delivering tuning control signals to the multiple-input-port and multiple-output-port tuning unit, the reactance of each of the adjustable impedance devices being mainly determined by one or more of the tuning control signals.
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公开(公告)号：US09829526B2
公开(公告)日：2017-11-28
申请号：US13667215
申请日：2012-11-02
发明人： Farzan Farbiz , Akram A. Salman
CPC分类号： G01R31/001 , H03H7/40 , H03H11/30 , Y10T307/74 , Y10T307/747
摘要： A circuit and method for electrostatic discharge testing using transmission line pulsing. A plurality of transmission line networks may be connected to a device under test, and each transmission line network may have different connected terminations. Switches may be used to select which transmission line networks are connected to the device under test, and which terminations, if any, are connected to transmission line networks.
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公开(公告)号：US20170294891A1
公开(公告)日：2017-10-12
申请号：US15629820
申请日：2017-06-22
申请人： BLACKBERRY LIMITED
摘要： A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed.
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