Patents by Inventor Wen Chi

Wen Chi 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).

  • Audio control device
    Patent number: 7194097
    Abstract: An Audio Codec which comprises a power selecting circuit an audio compiler circuit and a control amplifier circuit. The power selecting circuit receives at least a primary power source and an auxiliary power source and outputs a working power selected from the power sources. The auxiliary power source is selected and output to the control amplifier circuit only when the computer is at a power-off status. When the computer is power-on, the primary power source will be selected and output to both the audio compiler circuit and the control amplifier circuit. Therefore, the Audio Codec of the present invention only needs one set of internally furnished control amplifier circuit to both operate on the normal power-on status and perform the Power OFF CD function.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: March 20, 2007
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chu-Ting Su, Yi-Shu Chang, Jul-Cheng Huang, Wen-Chi Wang
  • Multimode communication device having an automatic call-back setting mechanism and its method
    Publication number: 20070054659
    Abstract: The present invention relates to a multimode communication device having an automatic call-back setting mechanism that includes a first wireless communication module for transmitting a first radio frequency signal and having a decision process; a second wireless communication module coupled to the first wireless communication module for transmitting a second radio frequency signal. If the first wireless communication module receives an incoming call signal of a communication system, the determination process will determine whether or not to terminate the incoming call signal and the second wireless communication module makes a call back to the communication system. The invention also discloses a method for automatically setting the call-back mechanism and a method for setting a man-machine interface for automatically setting a call-back mechanism.
    Type: Application
    Filed: November 4, 2005
    Publication date: March 8, 2007
    Inventors: Yi-Hsiung Chou, Jui-Hsiang Liu, Wen-Chi Chen
  • REFERENCE VOLTAGE GENERATING CIRCUIT
    Publication number: 20070046523
    Abstract: A reference voltage generating circuit includes: a first capacitor; a second capacitor; a reference voltage sampling capacitor; a first switch for alternatively coupling the second capacitor to a predetermined voltage to allow the second capacitor to sample the predetermined voltage; a second switch for alternatively coupling the second capacitor to the first capacitor to allow the second capacitor to redistribute charges with the first capacitor in order to generate the reference voltage; and a third switch for alternatively coupling the first capacitor to the reference voltage sampling capacitor to allow the reference voltage sampling capacitor to redistribute charges with the first capacitor in order to output the reference voltage.
    Type: Application
    Filed: August 8, 2006
    Publication date: March 1, 2007
    Inventors: Wen-Chi Wang, Chang-Shun Liu, Chao-Cheng Lee, Jui-Yuan Tsai
  • Process for reducing particle formation during etching
    Patent number: 7182880
    Abstract: A process for reducing the formation of potential device-contaminating particles in a process chamber, particularly an etch chamber or a pre-clean chamber used to pre-clean substrates prior to a PVD or other process. The process chamber conventionally includes multiple antennae, the purpose of which is to conduct bias power from a bias power source to a substrate supported on a pedestal assembly. According to the process of the invention, the antennae are removed from the pedestal assembly. Accordingly, the antennae, no longer present in the chamber during substrate processing, are capable of neither generating potential device-contaminating particles nor causing electrical arcing between the pedestal assembly and the chamber wall or other elements in the process chamber, leading to operational power loss.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: February 27, 2007
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Wen-Chi Chou, Kuang-Ya Li
  • FRACTIONAL FREQUENCY SYNTHESIZER AND PHASE LOCKED LOOP UTILIZING FRACTIONAL FREQUENCY SYNTHESIZER AND METHOD THEREOF
    Publication number: 20070040940
    Abstract: A fractional frequency synthesizer, applied to a phase-locked loop, includes a phase detector, a loop filter, a controllable oscillator, a first frequency divider, and a sigma-delta modulator (SDM). The phase detector generates a phase difference signal according to a reference signal and a feedback signal. The loop filter filters the phase difference signal to generate a filtered signal. The controllable oscillator generates the frequency signal according to the filtered signal. The first frequency divider generates the feedback signal by dividing a frequency of the frequency signal according to a dividing factor. The SDM determines the dividing factor according to a control signal.
    Type: Application
    Filed: August 18, 2006
    Publication date: February 22, 2007
    Inventors: Wen-Chi Wang, Tze-Chien Wang
  • Audio converting device and converting method thereof
    Patent number: 7181028
    Abstract: An audio converting device including a digital high-pass filter, an expander, a digital low-pass filter, a delta-sigma modulator, a digital-to-analog converter, an analog low-pass filter and a gain control unit is provided. The digital high-pass filter in this invention can filter out a direct-current component of digital audio data such that the production of noise is avoided when the volume is adjusted by users.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: February 20, 2007
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shih-Yu Ku, Wen-Chi Wang, Yi-Shu Chang, Chao-Cheng Lee
  • REFERENCE VOLTAGE GENERATING CIRCUIT
    Publication number: 20070030037
    Abstract: A reference voltage generating circuit includes a first capacitor having a first end and a second end; a second capacitor having a third end and a fourth end; a first switch for selectively coupling a predetermined voltage to the first end of the first capacitor; a second switch for selectively coupling the third end of the second capacitor to the first end of the first capacitor; a third switch for selectively coupling the first end of the first capacitor to a reference voltage level; and a fourth switch for selectively coupling the second end of the first capacitor to a reference voltage level; wherein the first capacitor samples the predetermined voltage in a first stage and re-distributes charges to the second capacitor in a second stage.
    Type: Application
    Filed: July 24, 2006
    Publication date: February 8, 2007
    Inventors: Wen-Chi Wang, Chang-Shun Liu, Chao-Cheng Lee, Jui-Yuan Tsai
  • Application circuit and method for shaping noises
    Publication number: 20070024483
    Abstract: An application circuit and method for shaping noises are provided. In an embodiment, an analog-to-digital converter converts a first analog signal into an n-bit digital signal for an encoder to generate a p-bit digital signal. Then a control circuit generates a plurality of control signals based on the p-bit digital signal, wherein p is two to the power of n minus one, and n is an integer greater than one. Each of the (2n?1) unit elements with element mismatch in an internal n-bit digital-to-analog converter executes the digital to analog conversion in response to the corresponding control signal, thereby generating a second analog signal, and an adder outputs the first analog signal based on the second analog signal and a third analog signal.
    Type: Application
    Filed: April 20, 2006
    Publication date: February 1, 2007
    Inventors: Chieh-Chuan Chin, Bing-I Chang, Wen-Chi Wang
  • Apparatus for feature detection
    Publication number: 20070019186
    Abstract: An apparatus for feature detection of a test object includes at least one light source module and at least one image capturing unit. The light source module provides light to illuminate a test region of the test object, and includes a substrate, a set of light-emitting components, and a light-focusing unit. The light-emitting components are mounted on the substrate for emitting light in parallel directions that are generally transverse to the substrate. The light-focusing unit is to be disposed between the light-emitting components and the test object, receives the light emitted by the light-emitting components, and focuses the light on the test region of the test object. The image capturing unit captures an image of the test object at the test region.
    Type: Application
    Filed: July 25, 2005
    Publication date: January 25, 2007
    Applicant: Chroma Ate Inc.
    Inventors: Hsin-Yueh Sung, Bing-Shien Chung, Wen-Chi Lo, Chin-Chiang Liao, Miao-Shen Liu
  • METHOD FOR MULTIMEDIA PROCESSING IN A COMPUTER SYSTEM AND RELATED DEVICE
    Publication number: 20060294556
    Abstract: A computer system includes a multimedia processing unit and an access device. The access device is used for loading a video signal of a storage medium. When the computer system is powered off and a multimedia mode is entered, the multimedia processing unit detects whether the storage medium is connected to the access device. If the storage medium is connected to the access device, the multimedia processing unit processes the video signal.
    Type: Application
    Filed: June 28, 2005
    Publication date: December 28, 2006
    Inventors: Wen-Chi Chen, Chung-Wen Chen, Chung-Wei Chiu
  • Gearshift mechanism for electromotive toy car
    Patent number: 7148434
    Abstract: Disclosed is a gearshift mechanism for electromotive toy car is provided in a space defined by a left cover and a right cover, including a gearshift lever, a slide plate, an opening shield plate, an opening shield securing plate, a switch plate, pushbuttons, a switch plate affixing shaft, and a gearshift lever pivotal pin, using the gearshift lever to drive the switch plate to push a pushbutton for actuating a motor, and a pedal throttle to activate a power switch for halting, driving slow advancement, fast advancement or slow reversing of the electromotive toy car, so as to meet children's desires to imitate adults' driving maneuvering through realistic activities.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: December 12, 2006
    Assignee: Merry Yard Enterprise Corp.
    Inventor: Li-Wen Chi
  • Screw alignment tool
    Patent number: 7146699
    Abstract: A screw alignment tool. The tool includes a base, a cover and a plurality of extending elements. The base has a plurality of fasteners, fixing two work pieces. The cover is disposed on the base through a connecting means and has a plurality of holes corresponding to the screw holes on the work pieces. The extending elements are disposed on the cover by the holes facing the base. Each extending element has a chute communicating with the hole of the cover. When the cover is moved to a predetermined operating position, the chutes are aligned with the screw holes, to better align screw mounting.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: December 12, 2006
    Assignee: Quanta Computer Inc.
    Inventor: Wen-Chi Chen
  • Amplifier circuit
    Patent number: 7138869
    Abstract: An amplifier circuit having a high time constant. An operational amplifier includes a non-converting input terminal coupled to a ground, a converting input terminal and an output terminal. A first resistor network including at least one stage is coupled between the converting input terminal and the output terminal. Each stage of the first resistor network includes a first node, a first current path and a second current path connected to the first node. The first current path of each stage of the first resistor network is connected to the first node of the next stage, the second current path of each stage of the first resistor network is grounded, and the first current path of the first stage of the first resistor network is connected to the converting input terminal. A loading unit is coupled between the converting input terminal and the output terminal.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: November 21, 2006
    Assignee: Realtek Semiconductors Corp.
    Inventors: Chao-Cheng Lee, Jui-Cheng Huang, Jui-Yuan Tsai, Wen-Chi Wang
  • Method of manufacturing MOS transistors
    Patent number: 7135365
    Abstract: First, a substrate having a plurality of NMOS transistor regions and PMOS transistor regions is provided. The substrate further includes a plurality of gate structures respectively positioned in the NMOS transistor regions and the PMOS transistor regions. A high-tensile thin film is then formed on the substrate and the plurality of gate structures. Subsequently, an annealing process is performed, and the high-tensile thin film is removed after the annealing process.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: November 14, 2006
    Assignee: United Microelectronics Corp.
    Inventors: Yi-Cheng Liu, Wen-Chi Chen, Tzu-Yun Chang, Bang-Chiang Lan, Cheng-Tung Huang, Wei-Tsun Shiau, Kuan-Yang Liao
  • PULSE WIDTH MODULATION (PWM) CONTROLLING MODULE AND METHOD FOR ADJUSTING A PWM SIGNAL THEREOF
    Publication number: 20060239044
    Abstract: A pulse width modulation (PWM) controlling module, includes: a PWM controller, a load detector, and an adjusting module. The PWM controller generates a PWM signal that is utilized for controlling a supply voltage applied to an electronic system. The load detector, coupled to the PWM controller, detects a load of the electronic system according to the PWM signal and generates a decision value accordingly. The adjusting module, coupled to the PWM controller and the load detector, controls the PWM controller to adjust the PWM signal according to the decision value.
    Type: Application
    Filed: April 20, 2005
    Publication date: October 26, 2006
    Inventors: Tseng-Wen Chen, Wen-Chi Fang, Yun-Chiang Wang, Yaw-Huei Tseng
  • METHOD OF MANUFACTURING MOS TRANSISTORS
    Publication number: 20060228847
    Abstract: First, a substrate having a plurality of NMOS transistor regions and PMOS transistor regions is provided. The substrate further includes a plurality of gate structures respectively positioned in the NMOS transistor regions and the PMOS transistor regions. A high-tensile thin film is then formed on the substrate and the plurality of gate structures. Subsequently, an annealing process is performed, and the high-tensile thin film is removed after the annealing process.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 12, 2006
    Inventors: Yi-Cheng Liu, Wen-Chi Chen, Tzu-Yun Chang, Bang-Chiang Lan, Cheng-Tung Huang, Wei-Tsun Shiau, Kuan-Yang Liao
  • Operating method for dynamic physical network layer monitoring
    Publication number: 20060227703
    Abstract: An operating method is disclosed for dynamic physical network layer monitoring. A plurality of built-in or extended network interface cards in a computer are to be merged or separated for multitasking operation, redundancy or any emergent application through continuously monitoring the network status. The network devices connected with the computer are checked after switching the computer on in the first step. Next, the drivers thereof are loaded to activate and initialize the network devices, and the connection therebetween is established. Afterward, the method further includes determining whether the devices need to be re-activated by continuously monitoring the network status.
    Type: Application
    Filed: April 8, 2005
    Publication date: October 12, 2006
    Inventors: Wen-Chi Hung, Cho-Hsine Liao, An-Sheng Chang, Ju-Yi Hung
  • Surround sound system
    Publication number: 20060222191
    Abstract: A surround sound system includes a pair of front speakers, a pair of surround speakers, a pair of reflective elements and a control unit. The front speakers are positioned in front of a listener location. The surround speakers are positioned in front of the listener location for outputting directed sound columns. The reflective elements are positioned in rear of the listener location for receiving the directed sound columns of the surround speakers and then reflecting to the listener location. The control unit is electrically connected to the front speakers and the surround speakers, thereby to delay output of forward sound signals of the front speakers.
    Type: Application
    Filed: April 5, 2005
    Publication date: October 5, 2006
    Inventors: Wen-Chi Hung, An-Sheng Chang
  • Backlight button assemblage
    Publication number: 20060203485
    Abstract: The present invention discloses a backlight button assemblage including an opaque button, a light-guiding element, and a light-emitting element. The light-emitting element is disposed under the button and a light emitted from the light-emitting element is guided to the front side of the button via the light-guiding element surrounding the button. Via the light-guiding ability of the light-guiding element and redisposing the light-emitting element, the present invention enables the light to be evenly distributed over the light-guiding element and to achieve the objective of light uniformity so that the partial dazzling spots are avoided, the quantity of light-emitting elements is reduced, and fabrication cost is saved.
    Type: Application
    Filed: November 23, 2005
    Publication date: September 14, 2006
    Inventors: Wen-Chi Fu, Tai-Li Chang
  • Elevating mechanism
    Publication number: 20060202095
    Abstract: An elevating mechanism for a projection apparatus includes a base, a movable leg, an elastomer, a decelerating module and a fixing component. The base is connected with the projection apparatus and has a slide, an accommodating space and an opening disposed at one end of the base. The accommodating space is located inside the base and communicated with the opening. The slide is in a sidewall of the base and communicated with the accommodating space. The movable leg is disposed through the opening and the accommodating space, and one end of the elastomer is disposed on the base. The movable leg is suitable for protruding from the opening of the base by the elastomer. Moreover, the decelerating module is disposed on the movable leg and is in the slide. The decelerating module is suitable for contacting with the base. The fixing component is suitable for fixing the movable leg.
    Type: Application
    Filed: February 6, 2006
    Publication date: September 14, 2006
    Inventors: Chun-How Shao, Wen-Chi Fu, Tai-Li Chang