Patents by Inventor Tien Yew Kang

Tien Yew Kang 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).

  • Patent number: 10397668
    Abstract: A plurality of batteries connected in series are monitored by a plurality of monitor devices, respectively. The monitor devices are connected in series to communicate under the daisy chain communication system. The daisy chain communication system includes a micro-control unit for producing a binary signal, a communication device for converting the binary signal to a pulsating signal. The communication device produces a special code based on an instructions from the micro-control unit. Each monitor device changes between a communication OFF state and a communication ON state. Each monitor device has a signal detector which operates during the communication OFF state and detects the special code, whereby upon detection of the special code, the signal detector generates a wakeup signal so that the monitor device is changed from the communication OFF state to communication ON state.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: August 27, 2019
    Assignees: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., PANASONIC ASIA PACIFIC PTE. LTD.
    Inventors: Hong Meng Tang, Chung Kiong Leslie Khoo, Tien Yew Kang, Muhammad s/o Abuturab, Narciso Repollo Semira, Gorou Mori
  • Publication number: 20170010329
    Abstract: A plurality of batteries connected in series are monitored by a plurality of monitor devices, respectively. The monitor devices are connected in series to communicate under the daisy chain communication system. The daisy chain communication system includes a micro-control unit for producing a binary signal, a communication device for converting the binary signal to a pulsating signal. The communication device produces a special code based on an instructions from the micro-control unit. Each monitor device changes between a communication OFF state and a communication ON state. Each monitor device has a signal detector which operates during the communication OFF state and detects the special code, whereby upon detection of the special code, the signal detector generates a wakeup signal so that the monitor device is changed from the communication OFF state to communication ON state.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 12, 2017
    Applicants: Panasonic Intellectual Property Management Co., Ltd., PANASONIC ASIA PACIFIC PTE. LTD.
    Inventors: Hong Meng TANG, Chung Kiong Leslie KHOO, Tien Yew KANG, Muhammad s/o ABUTURAB, Narciso Repollo SEMIRA, Gorou MORI
  • Publication number: 20150229160
    Abstract: A DC-DC converter system that can switch between BOOST and BUCK operation is used in a power failure prevention system. The DC-DC converter operates in BOOST mode at startup. It charges a storage capacitor via an inductor having its peak current controlled, together with a soft start ramp to limit the power supply in-rush current. During power failure, if the storage capacitor is charged above a pre-determined threshold and the input power supply discharges below a programmable threshold, the DC-DC converter switches from BOOST to BUCK mode, detectable through an internal power detection circuit; its output may also control an external/internal power switch that isolate the input main supply from the power bus. The BUCK mode converter will then dump the charges from the storage capacitor back to the power bus. The BOOST to BUCK mode seamless switchover is achieved through an analog/digital multiplexer that simplify the circuit implementation.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 13, 2015
    Applicants: PANASONIC ASIA PACIFIC PTE. LTD., PANASONIC CORPORATION
    Inventors: Yoshihito KAWAKAMI, Takuya ISHII, Hong Meng TANG, Chung Kiong Leslie KHOO, Tien Yew KANG, Jiong FU
  • Patent number: 7696808
    Abstract: A slew rate control circuit in output driver of switching circuit to prevent power ground undershoot is introduced. The gate capacitance of lower power transistor is first fast discharged to ensure the operation of the output signal. The gate capacitance of lower power transistor is then slowly discharged to limit OUT SLEW RATE. The gate capacitance of lower power transistor is further slowly discharged when the power ground level is below common ground. With above controlling, the gate voltage slew rate of lower power transistor is reduced when the lower power transistor is almost fully turned OFF. Therefore, undershoot at the power ground is avoided. Similar slew rate control circuit can also be derived in output driver of switching circuit to prevent PVCC overshoot.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: April 13, 2010
    Assignees: Panasonic Corporation, Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Shiah Siew Wong, Wee Sien Hong, Tien Yew Kang, Jing Sun
  • Publication number: 20090140796
    Abstract: A slew rate control circuit in output driver of switching circuit to prevent power ground undershoot is introduced. The gate capacitance of lower power transistor is first fast discharged to ensure the operation of the output signal. The gate capacitance of lower power transistor is then slowly discharged to limit OUT SLEW RATE. The gate capacitance of lower power transistor is further slowly discharged when the power ground level is below common ground. With above controlling, the gate voltage slew rate of lower power transistor is reduced when the lower power transistor is almost fully turned OFF. Therefore, undershoot at the power ground is avoided. Similar slew rate control circuit can also be derived in output driver of switching circuit to prevent PVCC overshoot.
    Type: Application
    Filed: December 4, 2007
    Publication date: June 4, 2009
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.
    Inventors: Shiah Siew WONG, Wee Sien HONG, Tien Yew KANG, Jing SUN
  • Patent number: 7532147
    Abstract: An analog voltage latch for use in a controller for controlling a motor equipped electric bicycle, includes a window comparator for comparing an analog voltage latch output and an analog input voltage to produce a comparison result, an S-R latch for producing HIGH or LOW according to the comparison result, a selector for selecting an operation, an up/down counter for counting up or down according to the HIGH or LOW from the S-R latch, and holding the counted result according to the selector result, and a DA converter for converting the counted result to analog signal.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: May 12, 2009
    Assignees: Panasonic Corporation, Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Kian Teck Teo, Tien Yew Kang
  • Publication number: 20090102408
    Abstract: A backward pedaling detection circuit has a charging/discharging circuit for charging and discharging the external capacitor to meet the threshold voltage required by the hysteresis comparator, based on the input from the hall sensor. An internal pull-down circuit, based on the pedal speed, keeps the circuit from false triggering. A comparator with hysteresis (Schmitt trigger) sets the upper and lower threshold voltage and eliminates the effect of noise. AND gates act like switches to allow the selected signal to pass through.
    Type: Application
    Filed: October 18, 2007
    Publication date: April 23, 2009
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.
    Inventors: Allan Candelaria DE JESUS, Yubin LIU, Tien Yew KANG, Kian Teck TEO
  • Patent number: 7446603
    Abstract: A differential input Class D audio power amplifier incorporating a differential error amplifier is introduced. In response of differential input signal, this differential error amplifier generates two error signals, which subsequently generates final output signal. This architecture makes it the effect of feedback signal error correction doubled, which helps in achieving good THD. In addition, input port of this architecture is also compatible with single-ended signal. A pop noise suppression technique for this differential input Class D audio power amplifier is also introduced.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: November 4, 2008
    Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Shiah Siew Wong, Wee Sien Hong, Tien Yew Kang, Chew Yuan Woong
  • Patent number: 7411368
    Abstract: An electric motor speed controller for use in a bicycle includes a motor to provide a propulsion force to move the bicycle. The actual motor speed and a target motor speed are compared, and if the actual motor speed is lower, more current is supplied to the motor, and if the actual motor speed is higher, less current is supplied to the motor.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: August 12, 2008
    Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
  • Patent number: 7411366
    Abstract: An electric power-assist system for a manually operated vehicle, such as a bicycle, has a pedal with Hall sensors for producing a signal representing a rotational speed of the pedal, and an electric motor for power assisting the driving force of the bicycle. A speed counter, speed decision block, up/down counter, and comparator are provided so that the power assist by the electric motor increases or degreases, as the speed of the manual controlling device increases or decreases, respectively.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: August 12, 2008
    Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
  • Publication number: 20080174341
    Abstract: An analog voltage latch for use in a controller for controlling a motor equipped electric bicycle, includes a window comparator for comparing an analog voltage latch output and an analog input voltage to produce a comparison result, an S-R latch for producing HIGH or LOW according to the comparison result, a selector for selecting an operation, an up/down counter for counting up or down according to the HIGH or LOW from the S-R latch, and holding the counted result according to the selector result, and a DA converter for converting the counted result to analog signal.
    Type: Application
    Filed: January 23, 2008
    Publication date: July 24, 2008
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.
    Inventors: Kian Teck TEO, Tien Yew KANG
  • Publication number: 20080112694
    Abstract: An electric motor speed controller for use in a bicycle includes a motor to provide a propulsion force to move the bicycle. The actual motor speed and a target motor speed are compared, and if the actual motor speed is lower, more current is supplied to the motor, and if the actual motor speed is higher, less current is supplied to the motor.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Applicants: Matsushita Electric Industrial Co. Ltd., Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
  • Publication number: 20080111511
    Abstract: An electric power-assist system for a manually operated vehicle, such as a bicycle, has a pedal with Hall sensors for producing a signal representing a rotational speed of the pedal, and an electric motor for power assisting the driving force of the bicycle. A speed counter, speed decision block, up/down counter, and comparator are provided so that the power assist by the electric motor increases or degreases, as the speed of the manual controlling device increases or decreases, respectively.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD., PANASONIC SEMICONDUCTOR ASIA PTE. LTD.
    Inventors: Tien Yew KANG, Kian Teck TEO, Yubin LIU
  • Publication number: 20080042743
    Abstract: A differential input Class D audio power amplifier incorporating a differential error amplifier is introduced. In response of differential input signal, this differential error amplifier generates two error signals, which subsequently generates final output signal. This architecture makes it the effect of feedback signal error correction doubled, which helps in achieving good THD. In addition, input port of this architecture is also compatible with single-ended signal. A pop noise suppression technique for this differential input Class D audio power amplifier is also introduced.
    Type: Application
    Filed: August 17, 2006
    Publication date: February 21, 2008
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., Panasonic Semiconductor Asia Pte. Ltd.
    Inventors: Shiah Siew WONG, Wee Sien HONG, Tien Yew KANG, Chew Yuan WOONG