Patents by Inventor Chun-yao Liao
Chun-yao Liao 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: 7777555Abstract: A temperature compensating circuit including a reference circuit, a transistor and a first circuit is provided. The reference circuit has a reference current and a resistance circuit, wherein the resistance circuit includes a first terminal receiving the reference current, a second terminal and a negative-temperature-coefficient resistor. The transistor has a drain, a source and a path disposed between the drain and the source, wherein the path of the transistor is connected in series with the resistance circuit, a gate of the transistor is electrically connected to the drain of the transistor and the second terminal of the resistance circuit, and the drain of the transistor produces a bias-voltage signal.Type: GrantFiled: January 27, 2009Date of Patent: August 17, 2010Assignee: Holtek Semiconductor Inc.Inventors: Chun-Yao Liao, Guan-Xing Huang, J-Ian Wu
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Publication number: 20100066434Abstract: A temperature compensating circuit including a reference circuit, a transistor and a first circuit is provided. The reference circuit has a reference current and a resistance circuit, wherein the resistance circuit includes a first terminal receiving the reference current, a second terminal and a negative-temperature-coefficient resistor. The transistor has a drain, a source and a path disposed between the drain and the source, wherein the path of the transistor is connected in series with the resistance circuit, a gate of the transistor is electrically connected to the drain of the transistor and the second terminal of the resistance circuit, and the drain of the transistor produces a bias-voltage signal.Type: ApplicationFiled: January 27, 2009Publication date: March 18, 2010Applicant: Holtek Semiconductor Inc.Inventors: Chun-Yao Liao, Guan-Xing Huang, J-Ian Wu
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Publication number: 20100066342Abstract: A control circuit for a single chip IC controlled by an external power is provided. The control circuit includes a regulating circuit, an MCU and a trigger circuit. The regulating circuit is controlled by the external power and includes a regulator to be enabled to generate an internal power for an internal circuit of the single chip IC. The MCU is controlled by the internal power and generates a switch signal to disable the regulator when the internal circuit of the single chip IC is standby. The trigger circuit is controlled by the external power and generates a trigger signal to enable the regulator based on an external signal.Type: ApplicationFiled: November 7, 2008Publication date: March 18, 2010Applicant: HOLTEK SEMICONDUCTOR INC.Inventor: Chun-Yao Liao
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Patent number: 7669025Abstract: The present invention provides an apparatus for security of accessing data, comprising a storage device including an address transform detector, a first lock bit register and a data comparator, the address transform detector providing a predetermined correction signal, data outputted from the storage device could be correctly identified when a memory address signal matches the predetermined correction signal and a latch signal is provided to the first lock bit register; and a micro-control unit for receiving data outputted from the storage device, the outputted data being stored in a second lock bit register and encoded by a serial encoding unit, a locking signal being feedback to the storage device; wherein a data encoded signal outputted from the first lock bit register and the locking signal are provided to a data comparator for comparison and determining whether output correct data to an encoding control unit according to the comparison.Type: GrantFiled: June 4, 2007Date of Patent: February 23, 2010Assignee: Holtek Semiconductor Inc.Inventor: Chun-Yao Liao
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Patent number: 7663425Abstract: A fuse option circuit including a fuse, a control switch, a latch, and a logical operational controller is provided. The latch stores a selected level. The logical operational controller outputs a selected result signal and feedbacks a control signal to the control switch. The level of the control signal determines whether the control switch is on or off. Therefore, the required level is input to the latch and the working mode having an ultra low current is selected. Furthermore, when the fuse is in an untrimmed state, the level of the selected result signal could be selected by a reset pulse signal of the latch in order to test a product. Afterward, it is determined whether the fuse is trimmed or not. When the fuse is in a trimmed state, the level of the selected result signal is established by a rising edge of the reset pulse signal.Type: GrantFiled: November 24, 2008Date of Patent: February 16, 2010Assignee: Holtek Semiconductor Inc.Inventors: Yu-Ren Chen, Chun-Yao Liao
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Patent number: 7656737Abstract: A pumping circuit for multiple nonvolatile memories, comprising: a high voltage source; and a high voltage pass block with a gate controlled by a local booster to introduce the high voltage source into a plurality of nonvolatile memories for erase/write operation.Type: GrantFiled: April 28, 2008Date of Patent: February 2, 2010Assignee: Holtek Semiconductor Inc.Inventor: Chun-Yao Liao
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Publication number: 20090225619Abstract: A pumping circuit for multiple nonvolatile memories, comprising: a high voltage source; and a high voltage pass block with a gate controlled by a local booster to introduce the high voltage source into a plurality of nonvolatile memories for erase/write operation.Type: ApplicationFiled: April 28, 2008Publication date: September 10, 2009Applicant: HOLTEK SEMICONDUCTOR INC.Inventor: CHUN-YAO LIAO
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Publication number: 20090128226Abstract: A fuse option circuit including a fuse, a control switch, a latch, and a logical operational controller is provided. The latch stores a selected level. The logical operational controller outputs a selected result signal and feedbacks a control signal to the control switch. The level of the control signal determines whether the control switch is on or off. Therefore, the required level is input to the latch and the working mode having an ultra low current is selected. Furthermore, when the fuse is in an untrimmed state, the level of the selected result signal could be selected by a reset pulse signal of the latch in order to test a product. Afterward, it is determined whether the fuse is trimmed or not. When the fuse is in a trimmed state, the level of the selected result signal is established by a rising edge of the reset pulse signal.Type: ApplicationFiled: November 24, 2008Publication date: May 21, 2009Inventors: Yu-Ren Chen, Chun-Yao Liao
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Patent number: 7532058Abstract: A fuse option circuit including a fuse, a control switch, a latch, and a logical operational controller is provided. The latch stores a selected level. The logical operational controller outputs a selected result signal and feedbacks a control signal to the control switch. The level of the control signal determines whether the control switch is on or off. Therefore, the required level is input to the latch and the working mode having an ultra low current is selected. Furthermore, when the fuse is in an untrimmed state, the level of the selected result signal could be selected by a reset pulse signal of the latch in order to test a product. Afterward, it is determined whether the fuse is trimmed or not. When the fuse is in a trimmed state, the level of the selected result signal is established by a rising edge of the reset pulse signal.Type: GrantFiled: July 30, 2007Date of Patent: May 12, 2009Assignee: Holtek Semiconductor, Inc.Inventors: Yu-Ren Chen, Chun-Yao Liao
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Publication number: 20080183998Abstract: The present invention provides an apparatus for security of accessing data, comprising a storage device including an address transform detector, a first lock bit register and a data comparator, the address transform detector providing a predetermined correction signal, data outputted from the storage device could be correctly identified when a memory address signal matches the predetermined correction signal and a latch signal is provided to the first lock bit register; and a micro-control unit for receiving data outputted from the storage device, the outputted data being stored in a second lock bit register and encoded by a serial encoding unit, a locking signal being feedback to the storage device; wherein a data encoded signal outputted from the first lock bit register and the locking signal are provided to a data comparator for comparison and determining whether output correct data to an encoding control unit according to the comparison.Type: ApplicationFiled: June 4, 2007Publication date: July 31, 2008Applicant: HOLTEK SEMICONDUCTOR INC.Inventor: Chun-Yao Liao
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Publication number: 20080061866Abstract: A fuse option circuit including a fuse, a control switch, a latch, and a logical operational controller is provided. The latch stores a selected level. The logical operational controller outputs a selected result signal and feedbacks a control signal to the control switch. The level of the control signal determines whether the control switch is on or off. Therefore, the required level is input to the latch and the working mode having an ultra low current is selected. Furthermore, when the fuse is in an untrimmed state, the level of the selected result signal could be selected by a reset pulse signal of the latch in order to test a product. Afterward, it is determined whether the fuse is trimmed or not. When the fuse is in a trimmed state, the level of the selected result signal is established by a rising edge of the reset pulse signal.Type: ApplicationFiled: July 30, 2007Publication date: March 13, 2008Inventors: Yu-Ren Chen, Chun-Yao Liao
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Publication number: 20070170961Abstract: Disclosed is an improved circuit and method for generating a power on reset signal, the circuit being a two-stage circuit comprising a delay-stage circuit and an output-stage circuit. The delay-stage circuit delays a time for a power on reset signal generated in the output-stage circuit changing from low to high, so that a power voltage having a low rising speed may be normally reset. Further, the two stages provide charging paths and discharging paths so that the power on reset signal may be prevented from changing from high to low when it has changed from low to high, when noises are presented on the power voltage.Type: ApplicationFiled: March 2, 2006Publication date: July 26, 2007Applicant: Holtek Semiconductor Inc.Inventors: Chun-Yao Liao, Yu-Ren Chen
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Publication number: 20050211230Abstract: A magnetized device for an automobile fueling system includes a sleeve, a pair of nozzles, a pair of semi-circular permanent magnets, and a pair of semi-circular guiding brackets. The permanent magnets and the guiding brackets are enclosed in the sleeve. The sleeve comprises inner threads at respective ends adapted to connect with two nozzles. Each nozzle has a hollow pipeline axially extending from one end while the other end is a reduced neck with threads thereon. The two guiding brackets are magnetized to wrap the permanent magnets, so that saw-shaped edges of the two guiding brackets are to form two gasoline routes to prolong the magnetization of gasoline.Type: ApplicationFiled: March 26, 2004Publication date: September 29, 2005Inventor: Chun-yao Liao
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Patent number: 6807953Abstract: A magnetized device for an automobile fueling system includes a sleeve, a pair of nozzles, a pair of semi-circular permanent magnets, and a pair of semi-circular guiding brackets. The permanent magnets and the guiding brackets are enclosed in the sleeve. The sleeve comprises inner threads at respective ends adapted to connect with two nozzles. Each nozzle has a hollow pipeline axially extending from one end while the other end is a reduced neck with threads thereon. The two guiding brackets are magnetized to wrap the permanent magnets, so that saw-shaped edges of the two guiding brackets are to form two gasoline routes to prolong the magnetization of gasoline.Type: GrantFiled: April 5, 2004Date of Patent: October 26, 2004Inventor: Chun-yao Liao
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Patent number: 6247459Abstract: A magnetized device for an automobile fueling system comprises two nozzles being wrapped by oil seals and secured in a sleeve which also including a guiding post and two permanent magnets therein. The improvements comprise the two permanent magnets each has a positive polar and a negative polar at opposite end that will attract each other to form a hollow barrel and receive the guiding post therein to form a magnetized gasoline flow channel. Thus, when gasoline flows through the channel, the magnetized channel shall disperse the gasoline particles for easy burning.Type: GrantFiled: August 4, 2000Date of Patent: June 19, 2001Inventor: Chun-yao Liao
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Patent number: 5899184Abstract: An air-inlet assistor has a hollow base seat, a hollow main body disposed on the hollow base seat, a hollow upper cover disposed on the hollow main body, an adjustment device disposed on the hollow upper cover, an operation device disposed in the hollow upper cover, a connection connected to the hollow upper cover, an inlet pipe connected to the connection, and an air cleaner disposed in the hollow base seat.Type: GrantFiled: December 15, 1997Date of Patent: May 4, 1999Inventor: Chun-Yao Liao
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Patent number: 5626112Abstract: An air-inlet assistor for vehicle engines is provided which connects to the engine with an inlet pipe. The air-inlet assistor includes a main body, an upper magnet and a lower magnet contained within the main body, and an air cleaner. The inner cavity of the main body is divided into an upper working chamber and a lower inlet chamber. The upper and lower magnets are disposed within the working chamber with like poles thereof being face to face, to generate a repelling force therebetween. An inverted cone is disposed on the bottom side of the lower magnet to seal an opening formed between the working chamber and the inlet chamber. When the engine is started, a drawing in force generated by vacuum in the engine makes the upper and lower magnets move together to break the seal in the opening formed in a partition board that separates the two chambers.Type: GrantFiled: October 2, 1995Date of Patent: May 6, 1997Inventor: Chun-Yao Liao