Patents by Inventor Wen-Chung Liu
Wen-Chung Liu 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: 7580687Abstract: A substantially rectangular shaped power amplifier module includes a power amplifier for amplifying radio frequency signals, a bias control terminal and a power sensing terminal disposed on the same side of the power amplifier module, an input terminal and a ground terminal disposed on the same side of the power amplifier module, and an output terminal and one or more power supply terminals disposed on the same side of the power amplifier module.Type: GrantFiled: December 30, 2005Date of Patent: August 25, 2009Assignee: Micro Mobio CorporationInventors: Ikuroh Ichitsubo, Kanya Kubota, Wen Chung Liu
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Patent number: 7515627Abstract: An ultra-wideband (UWB) transceiver for use in UWB communication includes a voltage-controlled oscillator (VCO) configured to periodically and sequentially generate a series of base frequencies based on a predetermined sequence and a waveform generator to generate carrier waves based on the generated base frequencies.Type: GrantFiled: August 29, 2005Date of Patent: April 7, 2009Assignee: Industrial Technology Research InstituteInventors: Wen-Chung Liu, Gin-Kou Ma
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Patent number: 7432782Abstract: A signal splitter includes a low-pass filter circuit for permitting a low-frequency component of an incoming signal in an incoming telephone line coupled to a first connecting port to pass therethrough to a second connecting port, and a coupling circuit including a capacitor coupled between a first terminal of the first connecting port and a second terminal of the second connecting port, and a coupling transformer having a primary winding that interconnects the first terminal of the first connecting port and a first input end of the low-pass filter circuit, and a secondary winding that interconnects the second terminal of the second connecting port and a second output end of the low-pass filter circuit.Type: GrantFiled: September 8, 2006Date of Patent: October 7, 2008Assignee: YCL Electronics Co., Ltd.Inventors: Yung-Sheng Chen, Wen-Chung Liu
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Publication number: 20080118003Abstract: A communication system comprising a channel encoder to generate a binary bit stream, a mapping unit coupled to the channel encoder, the mapping unit configured to receive the binary bit stream from the channel encoder and to map every “n” consecutive bits of the binary bit stream into a symbol in accordance with a mapping table, wherein the symbol has a symbol value related to a modulation mode, “n” being a positive integer, and a number of “m” modulation units coupled to the mapping unit, “m” being a positive integer, the modulation units configured to receive a set of “m” symbols from the mapping unit and modulate the set of “m” symbols based on the modulation mode, wherein a combined value of the symbol values of the set of “m” symbols from the mapping unit is distinguishable from another combined value of the symbol values of another set of “m” symbols from the mapping unit, and wherein a combined value of the symbol values of a set of “m” symbols from the mapping unit corresponds to a distinguishable bitType: ApplicationFiled: January 31, 2008Publication date: May 22, 2008Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Wen-Chung Liu, Gin-Kou Ma
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Patent number: 7356093Abstract: A communications system that comprises a channel encoder for encoding a plurality of information bits, a mapping unit coupled to the channel encoder for mapping the plurality of information bits into a first set of quadrature phase shift keying (QPSK) symbols and a second set of QPSK symbols, wherein every successive predetermined number of information bits are mapped to a first QPSK symbol and a second QPSK symbol in one symbol period in accordance with a mapping table, a first modulation unit coupled to the mapping unit for converting the first QPSK symbol into a first QPSK constellation symbol, and a second modulation coupled to the mapping unit for converting the second QPSK symbol into a second QPSK constellation symbol.Type: GrantFiled: July 15, 2003Date of Patent: April 8, 2008Inventors: Wen-Chung Liu, Gin-Kou Ma
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Publication number: 20080074210Abstract: A signal splitter includes a common mode choke circuit that includes a first choke coil having two input nodes coupled to an incoming telephone line, and two output nodes coupled respectively to two first input nodes of a first filter inductor of a first filter circuit, and a second choke coil having two input nodes coupled respectively to two second output nodes of a second filter inductor of a third filter circuit, and two output nodes coupled to a telephony instrument. A second filter circuit includes a first capacitor coupled between two first output nodes of the first filter inductor that are coupled respectively to two second input nodes of the second filter inductor. The third filter circuit further includes a second capacitor coupled between the second output nodes of the second filter inductor.Type: ApplicationFiled: September 8, 2006Publication date: March 27, 2008Applicant: YCL Electronics Co., Ltd.Inventors: Yung-Sheng Chen, Wen-Chung Liu
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Publication number: 20080061904Abstract: A signal splitter includes a low-pass filter circuit for permitting a low-frequency component of an incoming signal in an incoming telephone line coupled to a first connecting port to pass therethrough to a second connecting port, and a coupling circuit including a capacitor coupled between a first terminal of the first connecting port and a second terminal of the second connecting port, and a coupling transformer having a primary winding that interconnects the first terminal of the first connecting port and a first input end of the low-pass filter circuit, and a secondary winding that interconnects the second terminal of the second connecting port and a second output end of the low-pass filter circuit.Type: ApplicationFiled: September 8, 2006Publication date: March 13, 2008Applicant: YCL Electronics Co., Ltd.Inventors: Yung-Sheng Chen, Wen-Chung Liu
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Publication number: 20060222820Abstract: The present invention relates to a kind of bonding sheet made of hot-melt adhesive, by introducing its production method and way to glue, shape and bond two items. It is first to prepare a female die and a male die for producing the bonding sheet, which can be used to glue and bond the items. It is then made as follows: first prepare the hot-melt adhesive; then heat it to be melting; fill the melting hot-melt adhesive into the female die cavity via adding pressure; press the male and female dies to mount together; and finally cool it down to get the bonding sheet with hot-melt adhesive as composition. This sheet can be attached to the place where the two items are to be bonded, and glue the items through proper heating and pressing. After cooling down, it can be bonded with the items and become solid to bond and shape the two items, and eventually achieves the objective of convenient production and environmental protection.Type: ApplicationFiled: March 29, 2005Publication date: October 5, 2006Inventor: Wen-Chung Liu
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Publication number: 20060165155Abstract: An ultra-wideband (UWB) transceiver for use in UWB communication includes a voltage-controlled oscillator (VCO) configured to periodically and sequentially generate a series of base frequencies based on a predetermined sequence and a waveform generator to generate carrier waves based on the generated base frequencies.Type: ApplicationFiled: August 29, 2005Publication date: July 27, 2006Inventors: Wen-Chung Liu, Gin-Kou Ma
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Patent number: 6928308Abstract: A mobile phone hand-free extension device includes a FM radio transmitter with an active frequency searching circuitry to utilize a vehicular FM radio receiver for reproducing the audio signals from the mobile phone. The active frequency searching circuitry in this invention automatically detects which frequency band the vehicular FM radio receiver is currently using and set the RF frequency of the FM transmitter to the detected frequency. The FM transmitter relays the audio signals from the mobile phone by transmitting the audio signals through radio wave to the vehicular FM radio receiver to be reproduced by the speaker of the receiver.Type: GrantFiled: June 8, 2002Date of Patent: August 9, 2005Assignee: Micro Mobio Corporation Taiwan Branch (USA)Inventors: Guan-Wu Wang, Yi-Jeng Yang, Wen-Chung Liu, Teng-Chi Lin
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Publication number: 20040204158Abstract: A mobile phone hand-free extension device includes a FM radio transmitter with an active frequency searching circuitry to utilize a vehicular FM radio receiver for reproducing the audio signals from the mobile phone. The active frequency searching circuitry in this invention automatically detects which frequency band the vehicular FM radio receiver is currently using and set the RF frequency of the FM transmitter to the detected frequency. The FM transmitter relays the audio signals from the mobile phone by transmitting the audio signals through radio wave to the vehicular FM radio receiver to be reproduced by the speaker of the receiver.Type: ApplicationFiled: June 8, 2002Publication date: October 14, 2004Inventors: Guan-Wu Wang, Yi-Jeng Yang, Wen-Chung Liu, Teng-Chi Lin
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Patent number: 6762482Abstract: A memory device with composite contact plug and method for manufacturing the same. The composite contact plug comprises a first insulating layer deposited on a semiconductor substrate. A contact hole is formed to penetrate through the first insulation layer. A barrier layer is deposited in the contact hole and fills a portion of the contact hole. A contact plug is formed on the barrier layer and fills the contact hole. The first insulating layer is etched back until the surface of the first insulating layer is below the contact plug. A diffusion barrier layer is then deposited on the first insulating layer and the contact plug. The diffusion barrier layer is planarized until the contact plug is exposed to form a composite contact plug. The memory device is constructed on the composite contact plug.Type: GrantFiled: January 6, 2003Date of Patent: July 13, 2004Assignees: Winbond Electronics Corporation, Kabushiki Kaisha ToshibaInventors: Wen-Chung Liu, Bor-Ru Sheu, Yoshiaki Fukuzumi
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Publication number: 20040091061Abstract: A communications system that comprises a channel encoder for encoding a plurality of information bits, a mapping unit coupled to the channel encoder for mapping the plurality of information bits into a first set of quadrature phase shift keying (QPSK) symbols and a second set of QPSK symbols, wherein every successive predetermined number of information bits are mapped to a first QPSK symbol and a second QPSK symbol in one symbol period in accordance with a mapping table, a first modulation unit coupled to the mapping unit for converting the first QPSK symbol into a first QPSK constellation symbol, and a second modulation coupled to the mapping unit for converting the second QPSK symbol into a second QPSK constellation symbol.Type: ApplicationFiled: July 15, 2003Publication date: May 13, 2004Inventors: Wen-Chung Liu, Gin-Kou Ma
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Publication number: 20030127708Abstract: A memory device with composite contact plug and method for manufacturing the same. The composite contact plug comprises a first insulating layer deposited on a semiconductor substrate. A contact hole is formed to penetrate through the first insulation layer. A barrier layer is deposited in the contact hole and fills a portion of the contact hole. A contact plug is formed on the barrier layer and fills the contact hole. The first insulating layer is etched back until the surface of the first insulating layer is below the contact plug. A diffusion barrier layer is then deposited on the first insulating layer and the contact plug. The diffusion barrier layer is planarized until the contact plug is exposed to form a composite contact plug. The memory device is constructed on the composite contact plug.Type: ApplicationFiled: January 6, 2003Publication date: July 10, 2003Inventors: Wen-Chung Liu, Bor-Ru Sheu, Yoshiaki Fukuzumi
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Publication number: 20020109231Abstract: A capacitor formed on a conductive plug of a semiconductor substrate has a composite storage node, wherein a Ru conductive layer covers the conductive plug and a conductive oxide layer with a perovskite structure covers the Ru conductive layer. A capacitor dielectric layer covers the composite storage node. An electrode layer covers the capacitor dielectric layer.Type: ApplicationFiled: June 20, 2001Publication date: August 15, 2002Applicant: Winbond Electronics Corp.Inventors: Chung-Ming Chu, Bor-Ru Sheu, Ming-Chung Chiang, Min-Chieh Yang, Wen-Chung Liu, Jong-Bor Wang, Pai-Hsuan Sun
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Patent number: 6368910Abstract: A method for fabricating semiconductor memory cells such as dynamic random access memory (DRAM) and ferroelectric random access memory (FRAM) with improved contact between the capacitor electrode and the underneath device area. It includes the following main steps of: (1) forming a first dielectric layer on a wafer surface; (2) forming at least one through opening in the first dielectric layer; (3) forming a ruthenium based plug in the through opening; and (4) forming a capacitor in contact with the ruthenium based plug. The ruthenium based plug can be made of ruthenium metal, conductive ruthenium oxide, or a stack of conductive ruthenium oxide and ruthenium metal. The method allows the memory cell to be made without the need for a barrier, which is required to protect the storage electrode from reacting with Si atoms during the fabrication process.Type: GrantFiled: November 24, 2000Date of Patent: April 9, 2002Assignee: Winbond Electronics Corp.Inventors: Bor-Bu Sheu, Chung-Ming Chu, Ming-Chung Chiang, Min-Chieh Yang, Wen-Chung Liu, Jong-Bor Wang, Pai-Hsuan Sun
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Patent number: 6046703Abstract: A wireless transceiver includes a dielectric substrate having first and second major surfaces on which an RF circuit and a baseband processing circuit are mounted, and a printed circuit antenna formed on the substrate. The printed circuit antenna has at least one director formed by strip conductors disposed on the substrate, a reflector formed by the edge of a ground area disposed on the substrate, and a dipole formed by strip conductors on the substrate. The dipole is positioned between the reflector and the director. An antenna with this low profile and compact antenna structure has high directivity.Type: GrantFiled: November 10, 1998Date of Patent: April 4, 2000Assignee: Nutex Communication Corp.Inventors: Guan-Wu Wang, Wen-Chung Liu, Terng-Jie Lin
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Patent number: 5797812Abstract: A shock-absorbing device for rackets includes a first clamping plate having at least one first hole defined therein and a second clamping plate having at least one hole defined therein. The first and second clamping plates are respectively mounted to two sides of a plurality of strings of a racket with the first hole aligning with the associated second hole. A retaining device extends through the first hole and the associated second hole for securely holding the first and the second clamping plates together.Type: GrantFiled: April 14, 1997Date of Patent: August 25, 1998Inventor: Wen-Chung Liu
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Patent number: 5303918Abstract: A game racket comprises a head, a shaft and a handle. The head is provided with a ball-striking surface comprising at least an elastic covering area which forms respectively on both sides of the ball-striking surface a covering plane serving to enhance the ball controllability of the ball-striking surface. The elastic covering area also serves to prevent the strings, which make up the ball-striking surface, from moving aside by a force of a ball impacting the ball-striking surface. The elastic covering area further serves the purpose of absorbing the shock wave generated by the impact of a ball on the ball-striking surface.Type: GrantFiled: December 29, 1992Date of Patent: April 19, 1994Inventor: Wen-Chung Liu