Patents by Inventor Yuan-Wen Chang
Yuan-Wen Chang 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: 11966628Abstract: A memory device, includes a memory array for storing a plurality of vector data each of which has an MSB vector and a LSB vector. The memory array includes a plurality of memory units each of which has a first bit and a second bit. The first bit is used to store the MSB vector of each vector data, the second bit is used to store the LSB vector of each vector data. A bit line corresponding to each vector data executes one time of bit-line-setup, and reads the MSB vector and the LSB vector of each vector data according to the bit line. The threshold voltage distribution of each memory unit is divided into N states, where N is a positive integer and N is less than 2 to the power of 2, and the effective bit number stored by each memory unit is less than 2.Type: GrantFiled: June 2, 2022Date of Patent: April 23, 2024Assignee: MACRONIX INTERNATIONAL CO., LTD.Inventors: Wei-Chen Wang, Han-Wen Hu, Yung-Chun Li, Huai-Mu Wang, Chien-Chung Ho, Yuan-Hao Chang, Tei-Wei Kuo
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Patent number: 11955392Abstract: One aspect of this description relates to a testing apparatus including an advance process control monitor (APCM) in a first wafer, a plurality of pads disposed over and coupled to the APCM. The plurality of pads are in a second wafer. The testing apparatus includes a testing unit disposed between the first wafer and the second wafer. The testing unit is coupled to the APCM. The testing unit includes a metal structure within a dielectric. The testing apparatus includes a plurality of through silicon vias (TSVs) extending in a first direction from the first wafer, through the dielectric of the testing unit, to the second wafer.Type: GrantFiled: May 12, 2021Date of Patent: April 9, 2024Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Shuo-Wen Chang, Yu-Hsien Li, Min-Tar Liu, Yuan-Yao Chang
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Patent number: 11927628Abstract: The present disclosure provides a semiconductor wafer. The semiconductor wafer includes: a scribe line between a first row of dies and a second row of dies; and a benchmark circuit disposed adjacent to the scribe line and electrically coupled to a first conductive contact and a second conductive contact. The benchmark circuit includes a first device-under-test (DUT); a second DUT; a first switching circuit configured to selectively couple the first DUT and the second DUT to the first conductive contact; and a second switching circuit configured to selectively couple the first DUT and the second DUT to the second conductive contact.Type: GrantFiled: July 16, 2021Date of Patent: March 12, 2024Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.Inventors: Chu-Feng Liao, Hung-Ping Cheng, Yuan-Yao Chang, Shuo-Wen Chang
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Patent number: 9036377Abstract: A method for controlling voltage crossing a power switch of a switched-mode power converter includes the steps of: controlling a switch frequency of the power switch of the switched-mode power converter to a first frequency as activating the switched-mode power converter; and then changing the switch frequency of the power switch to a second frequency after the switched-mode power converter is activated for a predetermined time; wherein the first frequency is lower than the second frequency.Type: GrantFiled: May 13, 2012Date of Patent: May 19, 2015Assignee: Leadtrend Technology Corp.Inventors: Yuan-Wen Chang, Ren-Yi Chen, Yi-Lun Shen
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Publication number: 20120300499Abstract: A method for controlling voltage crossing a power switch of a switched-mode power converter is disclosed. The method comprises the steps of: controlling a switch frequency of a power switch of a switched-mode power converter to a first frequency as activating the switched-mode power converter; and changing the switch frequency of the power switch to a second frequency after a specific amount of time; wherein the first frequency is lower than the second frequency.Type: ApplicationFiled: May 13, 2012Publication date: November 29, 2012Inventors: Yuan-Wen Chang, Ren-Yi Chen, Yi-Lun Shen
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Patent number: 8120931Abstract: A control circuit for use in a power converter has a multi-function terminal, a current comparator circuit, and an under-voltage detection circuit. The current comparator circuit compares current flowing through a power switch of the power converter with a reference value through the multi-function terminal when the power switch is on, and turns the power switch off when the current reaches the reference value. The under-voltage detection circuit determines whether an input voltage of the power converter is less than a predetermined value through the multi-function terminal when the power switch is turned off.Type: GrantFiled: November 18, 2008Date of Patent: February 21, 2012Assignee: Leadtrend Technology Corp.Inventors: Yuan-Wen Chang, Chun-Teh Chen, Ren-Yi Chen, Yi-Shan Chu
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Patent number: 7772824Abstract: A control method for adjusting leading edge blanking time in a power converting system is disclosed. The control method includes: receiving a feedback signal relative to a load connected to an output terminal of the power converting system; determining the leading edge blanking time to be a first value if the feedback signal has a magnitude about a first voltage; and determining the leading edge blanking time to be a second value if the feedback signal has a magnitude about a second voltage, wherein the first value is smaller than the second value, and the first voltage is greater than the second voltage.Type: GrantFiled: October 6, 2009Date of Patent: August 10, 2010Assignee: Leadtrend Technology Corp.Inventors: Yuan-Wen Chang, Yu-Bin Wang, Ming-Nan Chuang, Yu-Chuan Liu
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Publication number: 20100124084Abstract: A control circuit for use in a power converter has a multi-function terminal, a current comparator circuit, and an under-voltage detection circuit. The current comparator circuit compares current flowing through a power switch of the power converter with a reference value through the multi-function terminal when the power switch is on, and turns the power switch off when the current reaches the reference value. The under-voltage detection circuit determines whether an input voltage of the power converter is less than a predetermined value through the multi-function terminal when the power switch is turned off.Type: ApplicationFiled: November 18, 2008Publication date: May 20, 2010Inventors: Yuan-Wen Chang, Chun-Teh Chen, Ren-Yi Chen, Yi-Shan Chu
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Publication number: 20100026268Abstract: A control method for adjusting leading edge blanking time in a power converting system is disclosed. The control method includes: receiving a feedback signal relative to a load connected to an output terminal of the power converting system; determining the leading edge blanking time to be a first value if the feedback signal has a magnitude about a first voltage; and determining the leading edge blanking time to be a second value if the feedback signal has a magnitude about a second voltage, wherein the first value is smaller than the second value, and the first voltage is greater than the second voltage.Type: ApplicationFiled: October 6, 2009Publication date: February 4, 2010Inventors: Yuan-Wen Chang, Yu-Bin Wang, Ming-Nan Chuang, Yu-Chuan Liu
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Patent number: 7619909Abstract: A control circuit for adjusting leading edge blanking time is disclosed. The control circuit is applied to a power converting system. The control circuit adjusts a leading edge blanking time according to a feedback signal relative to a load connected to the output terminal of the power converting system. An over-current protection mechanism of the power converting system is disabled within the leading edge blanking time.Type: GrantFiled: December 7, 2007Date of Patent: November 17, 2009Assignee: Leadtrend Technology Corp.Inventors: Yuan-Wen Chang, Yu-Bin Wang, Ming-Nan Chuang, Yu-Chuan Liu
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Publication number: 20090147548Abstract: A control circuit for adjusting leading edge blanking time is disclosed. The control circuit is applied to a power converting system. The control circuit adjusts a leading edge blanking time according to a feedback signal relative to a load connected to the output terminal of the power converting system. An over-current protection mechanism of the power converting system is disabled within the leading edge blanking time.Type: ApplicationFiled: December 7, 2007Publication date: June 11, 2009Inventors: Yuan-Wen Chang, Yu-Bin Wang, Ming-Nan Chuang, Yu-Chuan Liu
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Patent number: 7511974Abstract: A high voltage charging circuit is provided with the ability of rapid charging. The circuit is composed of a turn-on control circuit, a turn-off control circuit and a transistor. The turn-on control circuit is adopted to set a turn-on time of a transistor such that the transformer may store magnetic energy, while the turn-off control circuit is used to set a turn-off time of the transistor such that the transformer may release the magnetic energy to charge a high voltage capacitor. Smaller inductance reduces the turn-on time of the power transistor owing to the maximum current of the primary side of the transformer. Therefore, a small-sized transformer may be employed to reduce the volume of the charging circuit with nonoccurrence of saturation.Type: GrantFiled: October 22, 2004Date of Patent: March 31, 2009Assignee: Leadtrend Technology Corp.Inventors: Yi-Shan Chu, Ming-Nan Chuang, Yuan-Wen Chang
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Patent number: 7480159Abstract: A pulse-width-modulation control circuit of a switching-mode power converter with a primary-side feedback control is disclosed. The switching-mode power converter includes a transformer, a power switch, a current sensing resistor and the pulse-width-modulation control circuit. The transformer includes a primary-side winding, a secondary-side winding and an auxiliary winding. The pulse-width-modulation control circuit includes a sample and hold circuit, a transconductor circuit, an error amplifier and a pulse-width-modulation generator.Type: GrantFiled: April 19, 2007Date of Patent: January 20, 2009Assignee: Leadtrend Technology Corp.Inventors: Da-Chun Wei, Yuan-Wen Chang
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Publication number: 20080259655Abstract: A pulse-width-modulation control circuit of a switching-mode power converter with a primary-side feedback control is disclosed. The switching-mode power converter includes a transformer, a power switch, a current sensing resistor and the pulse-width-modulation control circuit. The transformer includes a primary-side winding, a secondary-side winding and an auxiliary winding. The pulse-width-modulation control circuit includes a sample and hold circuit, a transconductor circuit, an error amplifier and a pulse-width-modulation generator.Type: ApplicationFiled: April 19, 2007Publication date: October 23, 2008Inventors: Da-Chun Wei, Yuan-Wen Chang
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Patent number: 6982882Abstract: A high voltage charging circuit includes an activation control circuit, an inactivation control circuit and a power transistor. The activation control circuit is used for controlling an ON time period of the power transistor to enable the transformer to store excited-magnetic energy; the inactivation control circuit is used for controlling an OFF time period of the power transistor to make the transformer to release the excited-magnetic energy and use the excited-magnetic energy to charge the high voltage capacitor. Since the user can select a smaller Lp to keep constant the maximum value IP,max for the primary side current IP, the period tON can be made smaller as well, which means that a transformer 14 with a smaller volume can be utilized to reduce the entire size of the high voltage charging circuit.Type: GrantFiled: August 17, 2004Date of Patent: January 3, 2006Assignee: Leadtrend Technology CorporationInventors: Yi-Shan Chu, Ming-Nan Chuang, Yuan-Wen Chang
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Publication number: 20050094419Abstract: A high voltage charging circuit includes an activation control circuit, an inactivation control circuit and a power transistor. The activation control circuit is used for controlling an ON time period of the power transistor to enable the transformer to store excited-magnetic energy; the inactivation control circuit is used for controlling an OFF time period of the power transistor to make the transformer to release the excited-magnetic energy and use the excited-magnetic energy to charge the high voltage capacitor. Since the user can select a smaller Lp to keep constant the maximum value IP,max for the primary side current IP, the period tON can be made smaller as well, which means that a transformer 14 with a smaller volume can be utilized to reduce the entire size of the high voltage charging circuit.Type: ApplicationFiled: August 17, 2004Publication date: May 5, 2005Applicant: Leadtrend Technology CorporationInventors: Yi-Shan Chu, Ming-Nan Chuang, Yuan-Wen Chang
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Publication number: 20050093518Abstract: A high voltage charging circuit is provided with the ability of rapid charging. The circuit is composed of a turn-on control circuit, a turn-off control circuit and a transistor. The turn-on control circuit is adopted to set a turn-on time of a transistor such that the transformer may store magnetic energy, while the turn-off control circuit is used to set a turn-off time of the transistor such that the transformer may release the magnetic energy to charge a high voltage capacitor. Smaller inductance reduces the turn-on time of the power transistor owing to the maximum current of the primary side of the transformer. Therefore, a small-sized transformer may be employed to reduce the volume of the charging circuit with nonoccurrence of saturation.Type: ApplicationFiled: October 22, 2004Publication date: May 5, 2005Applicant: Leadtrend Technology Corp.Inventors: Yi-Shan Chu, Ming-Nan Chuang, Yuan-Wen Chang
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Publication number: 20050040793Abstract: A capacitance charge device with adjustable clamping voltage is disclosed in the invention, which includes a high-farad capacitance and a power supply device for charging to the high-farad capacitance. In addition, a switch device is connected between the power supply device and the capacitance, and through the on/off operations of the switch device, the on/off conductions between the power supply device and the capacitance can be controlled. Besides, a clamping circuit is connected between the switch device and the capacitance and also connected to the output terminal of the power supply device. In addition, the clamping circuit has a clamping voltage, which can be compared with the actual voltage so as to control the on/off operations of the switch device and in turn control the on/off conductions between the power supply device and the capacitance. In addition, the invention can constrain the battery voltage in the clamping voltage of the clamping circuit.Type: ApplicationFiled: August 21, 2003Publication date: February 24, 2005Inventors: Yuan-Wen Chang, Yi-Shan Chu
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Patent number: 6853166Abstract: A capacitance charge device with adjustable clamping voltage is disclosed in the invention, which includes a high-farad capacitance and a power supply device for charging to the high-farad capacitance. In addition, a switch device is connected between the power supply device and the capacitance, and through the on/off operations of the switch device, the on/off conductions between the power supply device and the capacitance can be controlled. Besides, a clamping circuit is connected between the switch device and the capacitance and also connected to the output terminal of the power supply device. In addition, the clamping circuit has a clamping voltage, which can be compared with the actual voltage so as to control the on/off operations of the switch device and in turn control the on/off conductions between the power supply device and the capacitance. In addition, the invention can constrain the battery voltage in the clamping voltage of the clamping circuit.Type: GrantFiled: August 21, 2003Date of Patent: February 8, 2005Assignee: Altek Corp.Inventors: Yuan-Wen Chang, Yi-Shan Chu