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公开(公告)号：US20200044486A1
公开(公告)日：2020-02-06
申请号：US16052492
申请日：2018-08-01
Applicant: Integrated Device Technology, Inc.
Inventor： Yue WANG , Lijie ZHAO
Abstract: In accordance with aspects of the present invention, a method and apparatus for demodulating an amplitude-modulated wireless power signal is presented. A method of receiving an amplitude modulated component of a wireless power transmission signal according to some embodiments includes receiving an input signal, wherein the input signal is based on an amplitude modulated wireless power signal; and applying an offset to the input signal to receive the amplitude modulated component. A demodulator according to some embodiments can include a first voltage-to-current converter that receives an input signal related to an amplitude modulated wireless power signal; a second voltage-to-current converter that receives an offset signal; and a summing node that adjusts a first current produced by the first voltage-to-current converter by a second current produced by the second voltage-to-current converter to produce an output signal.
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公开(公告)号：US20190131815A1
公开(公告)日：2019-05-02
申请号：US16175393
申请日：2018-10-30
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Lijie ZHAO
Abstract: In some embodiments, a wireless power charging circuit includes a wireless power receiver configured to receive wireless power from a receive coil and to produce a first voltage; an open loop capacitor divider coupled to receive the first voltage from the wireless power receiver and configured to provide a second voltage, the second voltage being reduced from the first voltage; and a linear battery charger coupled to receive the second voltage from the open loop capacitor and configured to provide a charging voltage to provide to a battery coupled to the system.
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公开(公告)号：US20190013728A1
公开(公告)日：2019-01-10
申请号：US16025779
申请日：2018-07-02
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Gustavo J. MEHAS , Lijie ZHAO
Abstract: In accordance with aspects of the present invention, a wireless power circuit is presented. In some embodiments, the wireless power circuit includes one or more high-side transistors; one or more low-side transistors coupled in series with the one or more high-side transistors, wherein the one or more low-side transistors can be controlled as current sources.
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公开(公告)号：US20180287497A1
公开(公告)日：2018-10-04
申请号：US15944513
申请日：2018-04-03
Applicant: Integrated Device Technology, Inc.
Inventor： Gustavo MEHAS , Rui LIU , Lijie ZHAO , Siqiang FAN , Tae Kwang PARK , Zhitong GUO
Abstract: A power converter control circuit includes a first ramp generator connected to an input voltage and configured to produce a first ramp signal; a second ramp generator connected to the input voltage and configured to produce a second ramp signal; an error amplifier configured to produce an error amplifier output. The first ramp signal and the error amplifier output are used to produce a first (pulse width modulation) PWM signal and the second ramp signal and the error amplifier output are used to produce a second PWM signal. The first and second PWM signals control an operating state of the circuit. In some embodiments, the first ramp signal includes an extended ramp reset time. In some embodiments, the first ramp generator includes a switching device, a current source, and a capacitor.
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公开(公告)号：US20190012586A1
公开(公告)日：2019-01-10
申请号：US16028207
申请日：2018-07-05
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Tao QI , Lijie ZHAO
CPC classification number: G06K19/06196 , G06Q20/347 , G06Q20/382 , H04B5/0031
Abstract: In accordance with aspects of the present invention, a magnetic secured transmission system is presented. A magnetic secure transmission (MST) system can include a full-bridge driver that includes four transistors configured to regulate current through a coil; and a driving controller coupled to drive the full-bridge driver at a high frequency. In some embodiments, the transistors in the full bridge regulator are driven with a high frequency pulsed-wave modulated (PWM) signal to control the current through the coil. A method of magnetic secured transmission (MST) of MST data according to some embodiments includes receiving the MST data; generating coil data in response to the MST data; driving transistors in a full bridge at a high frequency to drive current through a coil according to the coil data.
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Patent Agency Ranking
公开(公告)号：US20190058392A1
公开(公告)日：2019-02-21
申请号：US15897448
申请日：2018-02-15
Applicant: INTEGRATED DEVICE TECHNOLOGY, INC.
Inventor： Lijie ZHAO , Yue WANG , Stephen ULBRICH
CPC classification number: H02M1/36 , H02J7/025 , H02J50/12 , H02M7/217 , H02M2001/0006
Abstract: A rectifier circuit can include a plurality of FETs arranged as a rectifier; and a start-up circuit applied to each of the plurality of FETs that turn each of the FETs off during a circuit startup period, wherein the start-up circuit provides a large impedance for low power dissipation during normal operation of the rectifier.
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公开(公告)号：US20180159346A1
公开(公告)日：2018-06-07
申请号：US15828158
申请日：2017-11-30
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Gustavo James MEHAS , Lijie ZHAO , Tae Kwang PARK , Zhitong GUO
IPC: H02J7/00
CPC classification number: H02J7/0052 , H02J2007/0062 , H02M3/158
Abstract: A charging system that includes a switching control circuit coupled to four series-coupled MOSFET transistors; a flying capacitor coupled across two of the four series-coupled MOSFET transistors; and node between the two of the four series coupled transistors that couples to an output inductor to form a buck regulator is presented. Embodiments of the charging system can have increased efficiency, can reduce the size and inductance of the output inductor, and can be produced with a low voltage process.
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公开(公告)号：US20170126278A1
公开(公告)日：2017-05-04
申请号：US14975530
申请日：2015-12-18
Applicant: INTEGRATED DEVICE TECHNOLOGY, INC.
Inventor： Zhuyan SHAO , Lijie ZHAO , Yue WANG , Jianbin HAO
CPC classification number: H04B3/542 , H04B5/0031 , H04B5/0037 , H04B5/0081
Abstract: A transmitter/receiver that includes a wireless power receiving mode and a data transmission mode. In the wireless power receiving mode, the transmitter/receiver receives wireless power through and coil and provides power to a load. In data transmission mode, the transmitter/receives drives the coil according to data to transmit data.
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公开(公告)号：US20190332909A1
公开(公告)日：2019-10-31
申请号：US16510498
申请日：2019-07-12
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Tao QI , Lijie ZHAO , Gustavo James MEHAS , Tae Kwang PARK , Zhitong GUO , Siqiang FAN
IPC: G06K19/06 , G06Q20/32 , G06K7/08 , G06K7/10 , G06K19/077
Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
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公开(公告)号：US20190325280A1
公开(公告)日：2019-10-24
申请号：US16367189
申请日：2019-03-27
Applicant: Integrated Device Technology, Inc.
Inventor： Rui LIU , Tao QI , Lijie ZHAO , Gustavo James MEHAS , Tae Kwang PARK , Zhitong GUO , Siqiang FAN
Abstract: According to another embodiment, a system includes a driver circuit that drives a first output and a second output; a coil coupled between the first output and the second output such that the driver circuit drives current through the coil in response to control signals; and a programmable slew circuit coupled to the driver circuit. In some embodiments, a switch is coupled between the first output and the coil. In some embodiments an over-voltage protection circuit is coupled to protect the driver circuit.
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