Patents by Inventor Jiun Hung
Jiun Hung 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: 20130235633Abstract: A control circuit for a power converter has a current source, a sampling circuit, a signal processing circuit, a driving circuit, and a shared pin. The shared pin is used for coupling with a resistor and a switch. The current source, coupled with the shared pin, provides a current through the shared pin to the resistor in a first period. The sampling circuit, coupled with the shared pin, samples signals on the shared pin for generating a first sampling value and a second sampling value. The signal processing circuit, coupled with the sampling circuit, compares the first sampling value and the second sampling value. The driving circuit generates driving signals for conducting the switch. When the difference of the first sampling value and the second sampling value is less than a predetermined value, the signal processing circuit configures the driving circuit to intermittently conduct the switch in a second period.Type: ApplicationFiled: March 7, 2013Publication date: September 12, 2013Applicant: RICHTEK TECHNOLOGY CORPORATIONInventors: Tsung-Hsi YANG, Isaac Y. CHEN, Chien-Fu TANG, Jiun-Hung PAN
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Publication number: 20130234790Abstract: A control circuit for a power converter is disclosed, having a shared pin, a driving circuit, a current source, a sampling circuit, and a signal processing circuit. The shared pin is used for coupling with an output end of the power converter through a resistor. The driving circuit is used for conducting a switch of the power converter. The current source provides a current to the resistor through the shared pin. The sampling circuit samples the signal on the shared pin for generating a first sampling value and a second sampling value. When the difference between the first sampling value and the second sampling value is less than a predetermined value, the signal processing circuit configures the driving circuit to adjust at least one of the conduction time and the conduction frequency of the switch according to an output signal of the power converter received from the shared pin.Type: ApplicationFiled: March 12, 2013Publication date: September 12, 2013Applicant: RICHTEK TECHNOLOGY CORPORATIONInventors: Yung-Chih LAI, Isaac Y. CHEN, Chien-Fu TANG, Jiun-Hung PAN
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Publication number: 20130070379Abstract: The present invention discloses a power regulator with over current protection (OCP), a control circuit thereof, and a method of over current protection. The power regulator with OCP includes: a primary circuit, a transformer, and a secondary circuit. The power regulator receives AC power, and generates secondary current which is supplied to a load circuit. The primary circuit includes a control circuit which includes: a switch control circuit, a first comparator circuit, a sample and hold circuit, and a compensation circuit which is coupled to the sample and hold circuit. The compensation circuit adaptively adjusts a threshold level of the OCP according to a current sense signal, or controls a delay time of an over current detection signal to compensate an error of the OCP threshold level, which is caused by the AC power, such that the primary current may have a peak corresponding to a predetermined setting.Type: ApplicationFiled: September 21, 2011Publication date: March 21, 2013Inventors: Jiun-Hung Pan, Chien-Fu Tang, Isaac Y. Chen
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Publication number: 20130051089Abstract: A frequency jittering control circuit for a PFM power supply includes a pulse frequency modulator to generate a frequency jittering control signal to switch a power switch to generate an output voltage. The frequency jittering control circuit jitters an input signal or an on-time or off-time of the pulse frequency modulator to jitter the switching frequency of the power switch to thereby improve EMI issue.Type: ApplicationFiled: August 6, 2012Publication date: February 28, 2013Inventors: Jiun-Hung Pan, Chien-Fu Tang, Isaac Y. Chen
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Patent number: 8207043Abstract: A method for making a semiconductor MOS device is provided. A gate structure is formed on a substrate. A source and a drain are formed in the substrate on both sides of the gate structure. The substrate is then subjected to a pre-amorphization implant (PAI) process. A transitional stress layer is then formed on the substrate. Thereafter, a laser anneal with a first temperature is performed. After the laser anneal, a rapid thermal process is performed with a second temperature that is lower than the first temperature. Subsequently, the transitional stress layer is removed.Type: GrantFiled: September 28, 2009Date of Patent: June 26, 2012Assignee: United Microelectronics Corp.Inventors: Huang-Yi Lin, Jiun-Hung Shen, Chi-Horn Pai, Yi-Chung Sheng, Shih-Chieh Hsu
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Publication number: 20120155123Abstract: A reverse shunt regulator includes a MOSFET connected between a cathode and an anode, a switch and a current source serially connected between the cathode and the anode, and an error amplifier having a positive input node to receive an internal reference voltage, a negative input node connected to the reference electrode, and an output node connected to a control electrode of the MOSFET. When the voltage of the reference electrode is within a range, the larger the voltage of the reference electrode is, the less the current of the MOSFET is. Application of this reverse shunt regulator to a flyback converter for output feedback will reduce the power loss in a green mode of the flyback converter.Type: ApplicationFiled: December 15, 2011Publication date: June 21, 2012Applicant: RICHTEK TECHNOLOGY CORP.Inventors: Chien-Fu TANG, Issac Y. CHEN, Jiun-Hung PAN
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Publication number: 20120155122Abstract: A controller for a power converter is provided. The controller includes a sense current integrating circuit, a reference current integrating circuit and a drive signal generation circuit. The sense current integrating circuit performs an integrating operation to a sense current representative of a conduction current flowing through a power switch of the power converter and thereby outputs a first integrating result. The reference current integrating circuit performs another integrating operation to a reference current and thereby outputs a second integrating result. The drive signal generation circuit determines a switching period of the power switch according to a status of an output voltage of the power converter cooperative with a relative magnitude relationship between the first integrating result and the second integrating circuit. Furthermore, a controlling method for such power converter also is provided.Type: ApplicationFiled: March 4, 2011Publication date: June 21, 2012Applicant: RICHTEK TECHNOLOGY CORPInventors: Chien-Fu TANG, Isaac Y. CHEN, Jiun-Hung PAN
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Patent number: 7969162Abstract: The present invention is to provide a method and device of dynamically adjusting the operating voltage of a network integrated circuit including the steps of detecting and ranking the signal-to-noise ratio of N ports to single out a port for arbitration, dynamically controlling the operating voltage according to the signal-to-noise ratio of the port for arbitration, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a first threshold, increasing the operating voltage to a default operating voltage when the signal-to-noise ratio of the port for arbitration is smaller than the first threshold, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a second threshold, and increasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is smaller than the second threshold.Type: GrantFiled: October 28, 2010Date of Patent: June 28, 2011Assignee: Realtek Semiconductor Corp.Inventors: Chieh-Sheng Lee, Liang-Wei Huang, Jiun-Hung Yu, Shieh-Hsing Kuo
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Publication number: 20110141016Abstract: A mouse for measuring consistency of blood oxygen includes a mouse case, on which two transmitters, a transmitting circuit, a receiver, a receiving feedback circuit, a filtrate amplifying circuit, and a calculating unit are disposed. The transmitting circuit serves to control the transmitters to alternately radiate a red glow and an infrared light to the receiver. The receiving feedback circuit applies to convert them into an electrical signal, and the filtrate amplifying circuit obviates any promiscuous frequency existing in the electrical signal and amplifies the electrical signal. The calculating unit accordingly computes the signal to obtain the value of consistency of blood oxygen, which would thence be outputted from a communication interface for informing users about the consistency of blood oxygen, so as to prevent the discomfort suffered by the occurrence of oxygen deficiency in blood.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Inventors: Chun Hao LU, Cheng Chi Tai, Jiun Hung Lin
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Patent number: 7920656Abstract: The present invention relates to a method for searching a solution point of maximum-likelihood detection. The solution point locates at a symbol constellation. The method includes the following steps: determining a central point and a norm by a zero-forcing detection method; determining a searching range according to the central point and the norm; determining at least one qualified solution point according to the searching range; and determining the solution point of maximum-likelihood detection from the qualified solution points.Type: GrantFiled: December 16, 2005Date of Patent: April 5, 2011Assignee: Realtek Semiconductor Corp.Inventor: Jiun-Hung Yu
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Publication number: 20110076823Abstract: A method for making a semiconductor MOS device is provided. A gate structure is formed on a substrate. A source and a drain are formed in the substrate on both sides of the gate structure. The substrate is then subjected to a pre-amorphization implant (PAI) process. A transitional stress layer is then formed on the substrate. Thereafter, a laser anneal with a first temperature is performed. After the laser anneal, a rapid thermal process is performed with a second temperature that is lower than the first temperature. Subsequently, the transitional stress layer is removed.Type: ApplicationFiled: September 28, 2009Publication date: March 31, 2011Inventors: Huang-Yi Lin, Jiun-Hung Shen, Chi-Horn Pai, Yi-Chung Sheng, Shih-Chieh Hsu
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Publication number: 20110043221Abstract: The present invention is to provide a method and device of dynamically adjusting the operating voltage of a network integrated circuit including the steps of detecting and ranking the signal-to-noise ratio of N ports to single out a port for arbitration, dynamically controlling the operating voltage according to the signal-to-noise ratio of the port for arbitration, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a first threshold, increasing the operating voltage to a default operating voltage when the signal-to-noise ratio of the port for arbitration is smaller than the first threshold, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a second threshold, and increasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is smaller than the second threshold.Type: ApplicationFiled: October 28, 2010Publication date: February 24, 2011Applicant: REALTEK SEMICONDUCTOR CORP.Inventors: Chieh-Sheng Lee, Liang-Wei Huang, Jiun-Hung Yu, Shieh-Hsing Kuo
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Publication number: 20100298677Abstract: A wireless ring-type physical detector includes a ring, a sensor unit, an amplifier unit, a demultiplexer unit, a processor unit and a wireless transmission unit. The sensor unit uses a light signal to detect the blood oxygen saturation, the heartbeat and continuous blood pressure. The detected light signal is processed by each unit to get a physical parameter which is valuable for a clinic test.Type: ApplicationFiled: May 22, 2009Publication date: November 25, 2010Applicant: ASTEK TECHNOLOGY LTD.Inventors: CHUN-HAO LU, CHENG-CHI TAI, JIUN-HUNG LIN
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Patent number: 7839152Abstract: The present invention is to provide a method and device of dynamically adjusting the operating voltage of a network integrated circuit including the steps of detecting and ranking the signal-to-noise ratio of N ports to single out a port for arbitration, dynamically controlling the operating voltage according to the signal-to-noise ratio of the port for arbitration, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a first threshold, increasing the operating voltage to a default operating voltage when the signal-to-noise ratio of the port for arbitration is smaller than the first threshold, decreasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is greater than a second threshold, and increasing the operating voltage by a voltage unit when the signal-to-noise ratio of the port for arbitration is smaller than the second threshold.Type: GrantFiled: January 12, 2007Date of Patent: November 23, 2010Assignee: Realtek Semiconductor Corp.Inventors: Chieh-Sheng Lee, Liang-Wei Huang, Jiun-Hung Yu, Shieh-Hsing Kuo
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Publication number: 20100061489Abstract: A multiple-antenna receiver can enable and disable receive radio frequency front-end and analog front-end circuits of specific antenna receiving routes according to a predetermined scheme during the receive data phase. The predetermined scheme calculates signal quality indices of the receiving route antennas by means of a preamble sequence, and derives the modulation and coding scheme and the number of spatial streams via the information provided by a header sequence. Indications of the signal quality indices are compared with threshold values to determine which receiving routes are to be turned on and which receiving routes are to be turned off.Type: ApplicationFiled: September 9, 2009Publication date: March 11, 2010Inventors: Der-Zheng Liu, Jiun-Hung Yu, Kuang-Yu Yen
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Patent number: 7511729Abstract: A driver circuit of a thermal print head is disclosed including: a plurality of gating groups respectively coupled to a plurality of strobe signals of different timings in which each gating group includes a plurality of gate units respectively coupled to a plurality of heating elements; and a register module coupled to the plurality of gating groups for providing each gate unit with a corresponding color level data; wherein each gate unit controls a coupled heating element according to a corresponding strobe signal and a received color level data.Type: GrantFiled: January 5, 2006Date of Patent: March 31, 2009Assignee: Lite-On Technology Corp.Inventor: Ming-Jiun Hung
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Publication number: 20080297582Abstract: The present invention discloses a thermal printing apparatus and printing method thereof. The thermal printing apparatus includes a memory unit and a control unit. The method of the present invention includes storing at least a predetermined control mapping table, the predetermined control mapping table for recording control parameter settings of a thermal print head corresponding to different image gray levels under a predetermined power value; calculating an actual power value of the thermal print head; determining a target control mapping table according to the actual power value, the predetermined power value, and the predetermined control mapping table; and driving the thermal print head to print according to the target control mapping table.Type: ApplicationFiled: May 28, 2007Publication date: December 4, 2008Inventors: Ming-Jiun Hung, Chih-Wei Huang
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Publication number: 20080280566Abstract: The invention provides a wireless communication apparatus with performance simulation function. The wireless communication apparatus includes a channel emulator and at least one noise generator; therefore a real transmission environment can be simulated inside the wireless communication apparatus to thereby accelerate the testing process. Moreover, as this invention sets a random noise generator in front of the FFT, an approximate AWGN effect will be generated when the wireless communication apparatus is under test.Type: ApplicationFiled: May 7, 2008Publication date: November 13, 2008Inventors: Kuang-Yu Yen, Jiun-Hung Yu, Der-Zheng Liu, Tsung-Chun Cheng, Yung-Ting Chen
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Publication number: 20080176509Abstract: A wireless transmission method for broadcasting packets to a plurality of receiving devices includes: broadcasting a plurality of packets to the receiving devices, receiving signals transmitted from the receiving devices, generating a plurality of estimation results according to the signals transmitted from the receiving devices where each of the estimation results corresponds to a receiving quality while each of the receiving devices receives the packets, determining whether each of the receiving devices is suitable for receiving the packets according to each of the estimation results and a recipient condition and storing information of at least one of the receiving devices suitable for receiving the packets, and determining whether the at least one of the receiving devices needs to receive a broadcasted packet again according to the information and signals transmitted from the at least one of the receiving devices suitable for receiving the packets.Type: ApplicationFiled: January 22, 2008Publication date: July 24, 2008Inventors: Kuang-Yu Yen, Jiun-Hung Yu, Der-Zheng Liu, Chung-Yao Chang
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Patent number: 7365759Abstract: A thermal print head is disclosed including plural driver circuits, each for driving plural heating elements; and a strobe signal generator for generating a plurality of strobe signals of different timings in which each strobe signal is coupled to a part of the plurality of driver circuits. The plural driver circuits operate simultaneously according to the plurality of strobe signals.Type: GrantFiled: January 5, 2006Date of Patent: April 29, 2008Assignee: Lite-On Technology Corp.Inventors: Ming-Jiun Hung, Feng-Ming Yang