Patents by Inventor Kai-Cheung Juang
Kai-Cheung Juang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170125343Abstract: An electrical isolator packaging structure and a manufacturing method of an electrical isolator are provided. The electrical isolator packaging structure includes a first substrate, a second substrate, a coil, and a magnetic field (MF) sensor. The coil is disposed on the first substrate. The MF sensor is disposed on the second substrate. The position of the coil is arranged according to the position of the MF sensor such that the coil transmits a signal to the MF sensor. Thus, the electrical isolator can be implemented by magnetic coupling with the coil and the MF sensor.Type: ApplicationFiled: December 18, 2015Publication date: May 4, 2017Inventors: Yuan-Tai Chang, Kai-Cheung Juang
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Publication number: 20170117718Abstract: A battery management system and method are provided. The battery management system includes a plurality of battery devices, wherein each of the battery devices is connected in parallel. Each of the battery devices includes one or a plurality of battery cells which is configured to provide power, a switch circuit, and a controller which is configured to detect a reverse current. When the controller detects the reverse current, the controller will disable the switch circuit and enable a judgment mechanism to determine whether to re-enable the switch circuit.Type: ApplicationFiled: December 29, 2015Publication date: April 27, 2017Inventors: Bo-Ting YEH, Kai-Cheung JUANG
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Publication number: 20160169983Abstract: A magnetic sensing apparatus and a magnetic sensing method thereof are provided. The magnetic sensing apparatus includes a reference magnetic field (MF) generating unit, a MF sensing unit, a signal processing unit, a calibration unit and a frequency generating unit. The MF sensing unit senses an external MF and a reference MF to provide a MF sensing signal. The signal processing unit receives and transfers the MF sensing signal into an output signal. The calibration unit calibrates the output signal according to the MF sensing signal. The frequency generating unit provides an operating frequency. The reference MF generating unit provides the reference MF according to the operating frequency, and the MF sensing unit senses the external MF and the reference MF according to the operating frequency.Type: ApplicationFiled: January 8, 2015Publication date: June 16, 2016Inventors: Yuan-Tai Chang, Kai-Cheung Juang
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Publication number: 20160164315Abstract: A programmable battery source architecture includes: a battery module, including a plurality of battery units, and a programmable battery connection circuit coupled to the battery module. The programmable battery connection circuit includes: a matrix intersection line module, electrically coupled to the battery module for forming a plurality of battery connection configurations; a switch group, disposed at each line intersection of the matrix intersection line module, for switching the battery connection configurations; and a control unit, for dynamically controlling the switch group based on a load requirement, for selecting at least a battery connection configuration from the battery connection configurations, and accordingly, the battery module outputting at least an output voltage based on the selected at least a battery connection configuration.Type: ApplicationFiled: December 26, 2014Publication date: June 9, 2016Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Tung HSU, Shou-Hung LING, Kai-Cheung JUANG, Tzi-Cker CHIUEH, Chuan-Yu CHO
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Publication number: 20160094291Abstract: An optical communication device and a control method thereof are provided. The optical communication device includes a driving module, a data transmission module, a light emitting module, and a feedback module. The driving module generates a driving current. The data transmission module generates a data current according to a piece of data. The light emitting module is electrically connected to the driving module and the data transmission module directly and emits visible light according to an illuminating current generated by combining the driving current with the data current. The feedback module adjusts a direct current (DC) potential of one of the driving current and the data current so as to make an average intensity of the visible light equal a preset intensity.Type: ApplicationFiled: January 27, 2015Publication date: March 31, 2016Inventors: Jyun-Liang LAI, Chueh-Hao YU, Kai-Cheung JUANG
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Patent number: 9261566Abstract: An impedance analysis device adapted to an object under test (OUT) includes a signal generator, a signal analysis unit and a processing unit. The signal generator outputs a pulse signal to the OUT. The signal analysis unit acquires a response signal which the OUT responds to the pulse signal, and analyzes the response signal to obtain an analysis parameter. The processing unit coupled to the signal analysis unit receives the analysis parameter, so as to obtain an impedance variation characteristic of the OUT.Type: GrantFiled: November 27, 2013Date of Patent: February 16, 2016Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cihun-Siyong Gong, Yi-Feng Luo, Li-Ren Huang, Kai-Cheung Juang
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Patent number: 9182426Abstract: A current sensing circuit comprises a high frequency signal generator, an electromagnetic exchanger, and a demodulation circuit. The high frequency signal generator generates a high frequency signal. The electromagnetic exchanger couples to the high frequency signal generator, and receives the high frequency signal to generate a high frequency magnetic field. The high frequency magnetic field modulates the magnetic field induced by a current to generate a modulated magnetic field. The electromagnetic exchanger induces the modulated magnetic field to output a modulated signal. The demodulation circuit couples to the electromagnetic exchanger, and performs demodulation to output a sensing result according to the modulated signal.Type: GrantFiled: August 9, 2013Date of Patent: November 10, 2015Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hsuan-Yu Tsai, Kai-Cheung Juang
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Patent number: 8971065Abstract: A system for providing, from a direct current (DC) voltage source, an alternating current (AC) to an electrical grid outputting a grid voltage, the system including: a transformer for coupling to the DC voltage source through a first switch controlled by a first control signal, and configured to provide a converted voltage based on a DC voltage; a rectifier coupled to the transformer, and configured to generate an envelope voltage of the converted voltage; a plurality of switches coupled to the rectifier to receive the generated envelope voltage of the converted voltage, the plurality of switches being controlled by a plurality of control signals, respectively, and configured to generate the AC from the generated envelope voltage of the converted voltage; and control apparatus coupled to the first switch and the plurality of switches, and configured to provide, based on the grid voltage, the first control signal and the plurality of control signals.Type: GrantFiled: August 4, 2011Date of Patent: March 3, 2015Assignee: Industrial Technology Research InstituteInventors: Kai-Cheung Juang, Tzu-Yi Yang, Chung-Lin Tseng, Hsuan-Yu Tsai, Yung-Hsi Chang
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Publication number: 20150048853Abstract: An impedance analysis device adapted to an object under test (OUT) includes a signal generator, a signal analysis unit and a processing unit. The signal generator outputs a pulse signal to the OUT. The signal analysis unit acquires a response signal which the OUT responds to the pulse signal, and analyzes the response signal to obtain an analysis parameter. The processing unit coupled to the signal analysis unit receives the analysis parameter, so as to obtain an impedance variation characteristic of the OUT.Type: ApplicationFiled: November 27, 2013Publication date: February 19, 2015Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cihun-Siyong GONG, Yi-Feng LUO, Li-Ren HUANG, Kai-Cheung JUANG
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Publication number: 20140159711Abstract: A current sensing circuit comprises a high frequency signal generator, an electromagnetic exchanger, and a demodulation circuit. The high frequency signal generator generates a high frequency signal. The electromagnetic exchanger couples to the high frequency signal generator, and receives the high frequency signal to generate a high frequency magnetic field. The high frequency magnetic field modulates the magnetic field induced by a current to generate a modulated magnetic field. The electromagnetic exchanger induces the modulated magnetic field to output a modulated signal. The demodulation circuit couples to the electromagnetic exchanger, and performs demodulation to output a sensing result according to the modulated signal.Type: ApplicationFiled: August 9, 2013Publication date: June 12, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hsuan-Yu Tsai, Kai-Cheung Juang
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Publication number: 20130181659Abstract: An exemplary embodiment provides a charging method. The charging method includes detecting a charging current and producing a current-detecting signal according to the charging current; comparing the current-detecting signal with a first reference voltage and producing a current comparison signal accordingly; producing a second reference voltage according to the current comparison signal; comparing a battery voltage of a battery with the second reference voltage and producing a voltage comparison signal accordingly; producing a set of control signals according to the voltage comparison signal; and producing an adjusted charging voltage according to the control signals and a charging voltage, wherein the charging current is produced by the adjusted charging voltage to charge the battery.Type: ApplicationFiled: August 31, 2012Publication date: July 18, 2013Inventors: Yung-Hsi CHANG, Yi-Feng LUO, Chueh-Hao YU, Kai-Cheung JUANG
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Publication number: 20130179103Abstract: A battery analysis device for a battery module having at least one battery cell includes a power source supply unit, a signal capturing unit, a signal adjusting unit, a frequency domain analyzing unit, a time domain analyzing unit, and a processing unit. The power source supply unit provides a variable-frequency voltage signal to a battery cell. The signal capturing unit captures a current signal generated by a battery cell in response to the variable-frequency voltage signal. The signal adjusting unit adjusts the variable-frequency voltage signal and the current signal. The frequency domain analyzing unit and time domain analyzing unit analyze both the adjusted variable-frequency voltage signal and the adjusted current signal in frequency domain and time domain respectively for obtaining a frequency domain parameter and a time domain parameter. The processing unit obtains electrochemistry characteristics of the battery cell according to the frequency and the time domain parameters.Type: ApplicationFiled: April 4, 2012Publication date: July 11, 2013Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Yi-Feng Luo, Kai-Cheung Juang, Yung-Hsi Chang, Chueh-Hao Yu
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Patent number: 8441313Abstract: A current-mode analog baseband apparatus is provided. The apparatus includes a current-mode low-order filter, a current-mode programmable gain amplifier (PGA) unit and a high-order filter. The input impedance is smaller than the output impedance in the current-mode low-order filter. An input terminal of the current-mode PGA unit is connected to an output terminal of the current-mode low-order filter. An input terminal of the high-order filter is connected to an output terminal of the current-mode PGA unit.Type: GrantFiled: June 22, 2012Date of Patent: May 14, 2013Assignee: Industrial Technology Research InstituteInventors: Horng-Yuan Shih, Kai-Cheung Juang, Wei-Hsien Chen
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Patent number: 8427230Abstract: A current-mode analog baseband apparatus is provided. The apparatus includes a current-mode low-order filter, a current-mode programmable gain amplifier (PGA) unit and a high-order filter. The input impedance is smaller than the output impedance in the current-mode low-order filter. An input terminal of the current-mode PGA unit is connected to an output terminal of the current-mode low-order filter. An input terminal of the high-order filter is connected to an output terminal of the current-mode PGA unit.Type: GrantFiled: August 13, 2010Date of Patent: April 23, 2013Assignee: Industrial Technology Research InstituteInventors: Horng-Yuan Shih, Kai-Cheung Juang, Wei-Hsien Chen
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Publication number: 20130033906Abstract: A system for providing, from a direct current (DC) voltage source, an alternating current (AC) to an electrical grid outputting a grid voltage, the system including: a transformer for coupling to the DC voltage source through a first switch controlled by a first control signal, and configured to provide a converted voltage based on a DC voltage; a rectifier coupled to the transformer, and configured to generate an envelope voltage of the converted voltage; a plurality of switches coupled to the rectifier to receive the generated envelope voltage of the converted voltage, the plurality of switches being controlled by a plurality of control signals, respectively, and configured to generate the AC from the generated envelope voltage of the converted voltage; and control apparatus coupled to the first switch and the plurality of switches, and configured to provide, based on the grid voltage, the first control signal and the plurality of control signals.Type: ApplicationFiled: August 4, 2011Publication date: February 7, 2013Inventors: Kai-Cheung Juang, Tzu-Yi Yang, Chung-Lin Tseng, Hsuan-Yu Tsai, Yung-Hsi Chang
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Publication number: 20120262228Abstract: A current-mode analog baseband apparatus is provided. The apparatus includes a current-mode low-order filter, a current-mode programmable gain amplifier (PGA) unit and a high-order filter. The input impedance is smaller than the output impedance in the current-mode low-order filter. An input terminal of the current-mode PGA unit is connected to an output terminal of the current-mode low-order filter. An input terminal of the high-order filter is connected to an output terminal of the current-mode PGA unit.Type: ApplicationFiled: June 22, 2012Publication date: October 18, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Horng-Yuan Shih, Kai-Cheung Juang, Wei-Hsien Chen, Huan-Ke Chiu
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Patent number: 8289080Abstract: A current-mode amplifier including an input stage, a feedback circuit and an output stage is provided. The input stage has an input terminal for receiving an input current of the current-mode amplifier. The input stage generates a corresponding inner current in accordance with the input current and a feedback current. The feedback circuit is connected to the input stage. The feedback circuit generates the corresponding feedback current in accordance with the inner current of the input stage. An input terminal of the output stage is connected to an output terminal of the input stage. An output terminal of the output stage serves as an output terminal of the current-mode amplifier.Type: GrantFiled: August 13, 2010Date of Patent: October 16, 2012Assignee: Industrial Technology Research InstituteInventors: Horng-Yuan Shih, Wei-Hsien Chen, Kai-Cheung Juang
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Patent number: 8269539Abstract: An output stage configured to control a driving voltage thereof is provided. The output stage includes: a first switching current module, coupled to a node for outputting a first current; a second switching current module, coupled to the node for outputting a second current; a switching capacitor module with a capacitance, coupled to the node; a calibrating control circuit, for calibrating the first current, the second current and the capacitance; a time constant calibrating circuit, for generating a reference slew rate, and controlling the calibrating control circuit to selectively calibrate the first current, the second current and the capacitance, such that a ratio of the first current and the capacitance and the ratio of the second current and the capacitance conform to the reference slew rate; and a voltage clamper for setting a high/low voltage range and limiting a amplitude of the driving voltage within the high/low voltage range.Type: GrantFiled: December 17, 2010Date of Patent: September 18, 2012Assignee: Industrial Technology Research InstituteInventors: Kai-Cheung Juang, Hsin-Hong Hou, Yung-Pin Lee
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Publication number: 20120019323Abstract: A current-mode amplifier including an input stage, a feedback circuit and an output stage is provided. The input stage has an input terminal for receiving an input current of the current-mode amplifier. The input stage generates a corresponding inner current in accordance with the input current and a feedback current. The feedback circuit is connected to the input stage. The feedback circuit generates the corresponding feedback current in accordance with the inner current of the input stage. An input terminal of the output stage is connected to an output terminal of the input stage. An output terminal of the output stage serves as an output terminal of the current-mode amplifier.Type: ApplicationFiled: August 13, 2010Publication date: January 26, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Horng-Yuan Shih, Wei-Hsien Chen, Kai-Cheung Juang
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Publication number: 20120019314Abstract: A current-mode analog baseband apparatus is provided. The apparatus includes a current-mode low-order filter, a current-mode programmable gain amplifier (PGA) unit and a high-order filter. The input impedance is smaller than the output impedance in the current-mode low-order filter. An input terminal of the current-mode PGA unit is connected to an output terminal of the current-mode low-order filter. An input terminal of the high-order filter is connected to an output terminal of the current-mode PGA unit.Type: ApplicationFiled: August 13, 2010Publication date: January 26, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Horng-Yuan Shih, Kai-Cheung Juang, Wei-Hsien Chen, Huan-Ke Chiu