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).

  • Patent number: 7777555
    Abstract: 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: Grant
    Filed: January 27, 2009
    Date of Patent: August 17, 2010
    Assignee: Holtek Semiconductor Inc.
    Inventors: Chun-Yao Liao, Guan-Xing Huang, J-Ian Wu
  • Publication number: 20100066434
    Abstract: 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: Application
    Filed: January 27, 2009
    Publication date: March 18, 2010
    Applicant: Holtek Semiconductor Inc.
    Inventors: Chun-Yao Liao, Guan-Xing Huang, J-Ian Wu
  • Publication number: 20100066342
    Abstract: 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: Application
    Filed: November 7, 2008
    Publication date: March 18, 2010
    Applicant: HOLTEK SEMICONDUCTOR INC.
    Inventor: Chun-Yao Liao
  • Patent number: 7669025
    Abstract: 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: Grant
    Filed: June 4, 2007
    Date of Patent: February 23, 2010
    Assignee: Holtek Semiconductor Inc.
    Inventor: Chun-Yao Liao
  • Patent number: 7663425
    Abstract: 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: Grant
    Filed: November 24, 2008
    Date of Patent: February 16, 2010
    Assignee: Holtek Semiconductor Inc.
    Inventors: Yu-Ren Chen, Chun-Yao Liao
  • Patent number: 7656737
    Abstract: 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: Grant
    Filed: April 28, 2008
    Date of Patent: February 2, 2010
    Assignee: Holtek Semiconductor Inc.
    Inventor: Chun-Yao Liao
  • Publication number: 20090225619
    Abstract: 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: Application
    Filed: April 28, 2008
    Publication date: September 10, 2009
    Applicant: HOLTEK SEMICONDUCTOR INC.
    Inventor: CHUN-YAO LIAO
  • Publication number: 20090128226
    Abstract: 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: Application
    Filed: November 24, 2008
    Publication date: May 21, 2009
    Inventors: Yu-Ren Chen, Chun-Yao Liao
  • Patent number: 7532058
    Abstract: 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: Grant
    Filed: July 30, 2007
    Date of Patent: May 12, 2009
    Assignee: Holtek Semiconductor, Inc.
    Inventors: Yu-Ren Chen, Chun-Yao Liao
  • Publication number: 20080183998
    Abstract: 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: Application
    Filed: June 4, 2007
    Publication date: July 31, 2008
    Applicant: HOLTEK SEMICONDUCTOR INC.
    Inventor: Chun-Yao Liao
  • Publication number: 20080061866
    Abstract: 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: Application
    Filed: July 30, 2007
    Publication date: March 13, 2008
    Inventors: Yu-Ren Chen, Chun-Yao Liao
  • Publication number: 20070170961
    Abstract: 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: Application
    Filed: March 2, 2006
    Publication date: July 26, 2007
    Applicant: Holtek Semiconductor Inc.
    Inventors: Chun-Yao Liao, Yu-Ren Chen
  • Publication number: 20050211230
    Abstract: 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: Application
    Filed: March 26, 2004
    Publication date: September 29, 2005
    Inventor: Chun-yao Liao
  • Patent number: 6807953
    Abstract: 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: Grant
    Filed: April 5, 2004
    Date of Patent: October 26, 2004
    Inventor: Chun-yao Liao
  • Patent number: 6247459
    Abstract: 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: Grant
    Filed: August 4, 2000
    Date of Patent: June 19, 2001
    Inventor: Chun-yao Liao
  • Patent number: 5899184
    Abstract: 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: Grant
    Filed: December 15, 1997
    Date of Patent: May 4, 1999
    Inventor: Chun-Yao Liao
  • Patent number: 5626112
    Abstract: 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: Grant
    Filed: October 2, 1995
    Date of Patent: May 6, 1997
    Inventor: Chun-Yao Liao