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).
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Patent number: 10397668Abstract: 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: GrantFiled: July 6, 2015Date of Patent: August 27, 2019Assignees: 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
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Publication number: 20170010329Abstract: 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: ApplicationFiled: July 6, 2015Publication date: January 12, 2017Applicants: 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
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Publication number: 20150229160Abstract: 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: ApplicationFiled: February 7, 2014Publication date: August 13, 2015Applicants: PANASONIC ASIA PACIFIC PTE. LTD., PANASONIC CORPORATIONInventors: Yoshihito KAWAKAMI, Takuya ISHII, Hong Meng TANG, Chung Kiong Leslie KHOO, Tien Yew KANG, Jiong FU
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Patent number: 7696808Abstract: 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: GrantFiled: December 4, 2007Date of Patent: April 13, 2010Assignees: Panasonic Corporation, Panasonic Semiconductor Asia Pte. Ltd.Inventors: Shiah Siew Wong, Wee Sien Hong, Tien Yew Kang, Jing Sun
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Publication number: 20090140796Abstract: 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: ApplicationFiled: December 4, 2007Publication date: June 4, 2009Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.Inventors: Shiah Siew WONG, Wee Sien HONG, Tien Yew KANG, Jing SUN
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Patent number: 7532147Abstract: 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: GrantFiled: January 23, 2008Date of Patent: May 12, 2009Assignees: Panasonic Corporation, Panasonic Semiconductor Asia Pte. Ltd.Inventors: Kian Teck Teo, Tien Yew Kang
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Publication number: 20090102408Abstract: 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: ApplicationFiled: October 18, 2007Publication date: April 23, 2009Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.Inventors: Allan Candelaria DE JESUS, Yubin LIU, Tien Yew KANG, Kian Teck TEO
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Patent number: 7446603Abstract: 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: GrantFiled: August 17, 2006Date of Patent: November 4, 2008Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.Inventors: Shiah Siew Wong, Wee Sien Hong, Tien Yew Kang, Chew Yuan Woong
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Patent number: 7411366Abstract: 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: GrantFiled: November 13, 2006Date of Patent: August 12, 2008Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
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Patent number: 7411368Abstract: 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: GrantFiled: November 13, 2006Date of Patent: August 12, 2008Assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Semiconductor Asia Pte. Ltd.Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
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Publication number: 20080174341Abstract: 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: ApplicationFiled: January 23, 2008Publication date: July 24, 2008Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., PANASONIC SEMICONDUCTOR ASIA PTE., LTD.Inventors: Kian Teck TEO, Tien Yew KANG
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Publication number: 20080112694Abstract: 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: ApplicationFiled: November 13, 2006Publication date: May 15, 2008Applicants: Matsushita Electric Industrial Co. Ltd., Panasonic Semiconductor Asia Pte. Ltd.Inventors: Tien Yew Kang, Kian Teck Teo, Yubin Liu
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Publication number: 20080111511Abstract: 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: ApplicationFiled: November 13, 2006Publication date: May 15, 2008Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD., PANASONIC SEMICONDUCTOR ASIA PTE. LTD.Inventors: Tien Yew KANG, Kian Teck TEO, Yubin LIU
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Publication number: 20080042743Abstract: 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: ApplicationFiled: August 17, 2006Publication date: February 21, 2008Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., Panasonic Semiconductor Asia Pte. Ltd.Inventors: Shiah Siew WONG, Wee Sien HONG, Tien Yew KANG, Chew Yuan WOONG