Patents by Inventor Kai Chou

Kai Chou 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).

  • Publication number: 20130201042
    Abstract: A method for configuring a plurality of analog-to-digital converter (ADC) keys includes: utilizing a processor for determining a plurality of divided-voltages respectively corresponding to the Keys according to a plurality of voltage variation ranges respectively corresponding to the Keys; and calculating a plurality of resistive values of a voltage dividing model according to at least the divided-voltages, wherein the voltage dividing model has a plurality of voltage dividing configurations respectively corresponding to the keys.
    Type: Application
    Filed: September 12, 2012
    Publication date: August 8, 2013
    Inventors: Kun Lan, Yingyi Liu, Yu-Kai Chou
  • Publication number: 20130076325
    Abstract: A voltage regulator includes a pass transistor, an operational amplifier and a voltage divider circuit. The pass transistor receives a supply voltage to generate a regulated output voltage according to a control signal. The operational amplifier generates the control signal according to a feedback voltage. The voltage divider circuit generates the feedback voltage at a feedback node according to the regulated output voltage, and includes a string of resistors and a stabilization element. The string of resistors is coupled to the pass transistor and includes multiple resistors. The stabilization element is coupled to the resistors and receives the regulated output voltage.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 28, 2013
    Applicant: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yingyi LIU, Kun LAN, Chih-Chien HUANG, Yu-Kai CHOU
  • Publication number: 20130059968
    Abstract: The plastic composition includes PET and Nylon. The weight percentage of PET is between 20% and 90%. The weight percentage of Nylon is between 5% and 40%.
    Type: Application
    Filed: August 28, 2012
    Publication date: March 7, 2013
    Inventors: Fei-Lin YANG, Yang-Po Chiu, Ching-Feng Chen, Po-Wen Huang, Chun-Kai Chou, Wun-Sheng Wu, Win-Jon Lin, Ping-Huang Chen
  • Publication number: 20130038483
    Abstract: An analog-to-digital converter is provided. The analog-to-digital converter includes a sampling-voltage providing circuit, a first comparison circuit, a second comparison circuit, and an encoder circuit. The sampling-voltage providing circuit provides a group of first comparison voltages and a group of second comparison voltages. The first comparison circuit performs a first comparison operation to an analog-signal input quantity according to the group of first comparison voltages to generate a first comparison digital quantity. The second comparison circuit selects second comparison voltages among the group of second comparison voltages according to the first comparison digital quantity and performs a second comparison operation to the analog-signal input quantity according to the selected second comparison voltages to generate a second comparison digital quantity.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 14, 2013
    Applicant: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Cong LIU, Yu-Kai CHOU
  • Publication number: 20130033391
    Abstract: A multiplying digital-to-analog converter (MDAC) is provided. The MDAC includes a sub DAC decoding circuit, a capacitor-switch circuit, and an operation amplifier circuit. The capacitor-switch circuit includes at least two sampling capacitor sets which are coupled in parallel. The number of sampling capacitors in one of the sampling capacitor sets is larger than or equal to two. Each sampling capacitor set is coupled to an analog-signal input quantity through a sampling switch and to a corresponding output terminal of the sub DAC decoding circuit through a decoding switch. The sub DAC decoding circuit decodes a digital quantity and outputs a corresponding analog signal at each output terminal, such that the corresponding analog signals are applied to the respective sampling capacitor sets through the decoding switches and summed by the respective sampling capacitor sets to obtain an analog-signal quantity corresponding to the digital quantity.
    Type: Application
    Filed: August 6, 2012
    Publication date: February 7, 2013
    Applicant: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Cong LIU, Yu-Kai CHOU
  • Publication number: 20130027232
    Abstract: An analog-to-digital converter is provided and comprises a most significant bit (MSB) conversion module, a successive approximation register analog-to-digital converter (SAR ADC) module, and an operation module. The MSB conversion module receives an analog signal to be converted, and converts the analog signal to an MSB with M bits, and obtains a redundancy signal. The SAR ADC module is coupled to the MSB conversion module. The SAR ADC receives the redundancy signal and processes the redundancy signal to be a least significant bit (LSB) with N bits. The operation module is coupled to the MSB conversion module and the SAR ADC module. The operation module receives the MSB with the M bits and the LSB with the N bits and generates a first digital signal with (M+N) bits. Each of M and N is positive, and (M+N) is a positive integer.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yingyi LIU, Yu-Kai CHOU, Kun LAN
  • Publication number: 20120273044
    Abstract: The disclosure provides an electrolyte composition and dye-sensitized solar cell using the same. The electrolyte composition includes a diionic liquid of Formula: Z?(X-Y-X)Z??, wherein X includes ammonium, imidazolium, pyridinium or phosphonium, Y is (CH2)n, n is an integer of 1-16, Z is I, and Z? is I, PF6, BF4, N(SO2CF3), NCS or N(CN)2.
    Type: Application
    Filed: July 4, 2012
    Publication date: November 1, 2012
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yung-Liang Tung, Jia-Yin Wu, Jen-An Chen, Wen-Yueh Ho, Yu-Kai Chou
  • Publication number: 20120276395
    Abstract: A manufacturing method of a casing with a ceramic surface comprises the steps of: forming a ceramic oxidation layer on a surface of a metal shell; forming a ceramic material on the ceramic oxidation layer; and sintering the ceramic material. Accordingly, the metal casing can be formed with a ceramic surface, which can solve the problem of high shrinkage rate.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 1, 2012
    Inventors: Fei-Lin Yang, Yang-Po Chiu, Chun-Kai Chou
  • Publication number: 20120070846
    Abstract: A single molecule or molecule complex detection method is disclosed in certain aspects, comprising nano- or micro-fluidic channels.
    Type: Application
    Filed: February 9, 2009
    Publication date: March 22, 2012
    Applicants: The Texas A&M University System, The Board of Regents of the University of Texas System
    Inventors: Jun Kameoka, Nan Jing, Mien-chie Hung, Chao-Kai Chou
  • Publication number: 20110099493
    Abstract: An image auxiliary data searching and displaying method is used in a document camera. The document camera includes a processor and a user interface. The processor is accessible to a database. The image auxiliary data searching and displaying method includes steps of performing an image-selecting operation on an image of the to-be-displayed object via the user interface to generate a target image, processing the target image by the processor to generate a target characteristic property, searching the database by the processor according to the target characteristic property so as to generate a search result, and simultaneously displaying at least one image auxiliary data from the search result and the image of the to-be-displayed object for comparison.
    Type: Application
    Filed: July 1, 2010
    Publication date: April 28, 2011
    Applicant: AVERMEDIA INFORMATION, INC.
    Inventors: Cheng-Cheng Yu, Chun-Chi Huang, Chien-Hung Chen, Lien-Kai Chou
  • Patent number: 7911370
    Abstract: A pipeline analog-to-digital converter (ADC) comprises a plurality of pipeline stages is disclosed. The first pipeline stage has programmable gain function. The first pipeline stage includes a sub-analog-to-digital converter (sub-ADC) and a multiplying digital-to-analog converter (MDAC) implemented by switched capacitor (SC) circuits. Different capacitances in the sub-ADC and MDAC are provided so as to provide different gains by controlling switches in the SC circuits.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: March 22, 2011
    Assignee: Mediatek Inc.
    Inventor: Yu-kai Chou
  • Publication number: 20100328129
    Abstract: A pipeline analog-to-digital converter (ADC) comprises a plurality of pipeline stages is disclosed. The first pipeline stage has programmable gain function. The first pipeline stage includes a sub-analog-to-digital converter (sub-ADC) and a multiplying digital-to-analog converter (MDAC) implemented by switched capacitor (SC) circuits. Different capacitances in the sub-ADC and MDAC are provided so as to provide different gains by controlling switches in the SC circuits.
    Type: Application
    Filed: June 25, 2009
    Publication date: December 30, 2010
    Applicant: MEDIATEK INC.
    Inventor: Yu-kai Chou
  • Patent number: 7847720
    Abstract: A pipelined analog-to-digital converter includes at least one multiplying digital-to-analog converter and at least one sub-ADC. The multiplying digital-to-analog converter includes at least one first capacitor, at least one second capacitor, an amplifier, and a plurality of switches. The amplifier is coupled to the first and the second capacitors. The switches control a connection between the first and the second capacitors according to a first control signal, a second control signal and a digital signal. In a first period, the first capacitor is connected to the second capacitor in parallel. In a second period, the first capacitor is connected to the second capacitor in series. At least one switch among the switches is composed of a transistor. The sub-ADC provides a digital signal according to the first and second control signals.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: December 7, 2010
    Assignee: Mediatek Inc.
    Inventor: Yu-Kai Chou
  • Patent number: 7847601
    Abstract: A comparator includes a plurality of switches, a capacitor, an amplifier, and a latch. The switches provide an input signal during a first period and provide a reference signal during a second period. A first switch among the switches is composed of a first transistor. The capacitor receives the input signal during the first period and receives the reference signal during the second period. The amplifier is coupled to the capacitor for receiving a difference voltage between the input signal and the reference signal and amplifies the difference voltage during the second period to generate an amplified result. The determining circuit provides a digital signal according to the amplified result.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: December 7, 2010
    Assignee: Mediatek Inc.
    Inventor: Yu-Kai Chou
  • Patent number: 7847629
    Abstract: A sample-and-hold amplifier is provided. The sample-and-hold amplifier comprises a sample-and-hold circuit and a buffer circuit. The sample-and-hold circuit receives an input signal and transmits the input signal to a first node according to a control signal. The buffer circuit is coupled between a supply voltage source and a ground and controlled by the first node to provide an output signal at an output node. The buffer circuit comprises a native MOS transistor coupled to the output node.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: December 7, 2010
    Assignee: Mediatek Inc.
    Inventor: Yu-Kai Chou
  • Publication number: 20100182173
    Abstract: A flip-flop includes a sense amplifier stage and a latch stage. The sense amplifier includes a first P type transistor and generates a first sensed signal and a second sensed signal in a first node and a second node, respectively. When the first P type transistor is turned on, the first node is connected to the second node. The latch stage generates a first output signal and a second output signal according to the first and the second sensed signals.
    Type: Application
    Filed: January 16, 2009
    Publication date: July 22, 2010
    Applicant: MEDIATEK INC.
    Inventor: Yu-Kai Chou
  • Publication number: 20100182179
    Abstract: A pipelined analog-to-digital converter includes at least one multiplying digital-to-analog converter and at least one sub-ADC. The multiplying digital-to-analog converter includes at least one first capacitor, at least one second capacitor, an amplifier, and a plurality of switches. The amplifier is coupled to the first and the second capacitors. The switches control a connection between the first and the second capacitors according to a first control signal, a second control signal and a digital signal. In a first period, the first capacitor is connected to the second capacitor in parallel. In a second period, the first capacitor is connected to the second capacitor in series. At least one switch among the switches is composed of a transistor. The sub-ADC provides a digital signal according to the first and second control signals.
    Type: Application
    Filed: January 16, 2009
    Publication date: July 22, 2010
    Applicant: MEDIATEK INC.
    Inventor: Yu-Kai Chou
  • Patent number: 7760117
    Abstract: A flip-flop includes a sense amplifier stage and a latch stage. The sense amplifier includes a first P type transistor and generates a first sensed signal and a second sensed signal in a first node and a second node, respectively. When the first P type transistor is turned on, the first node is connected to the second node. The latch stage generates a first output signal and a second output signal according to the first and the second sensed signals.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: July 20, 2010
    Assignee: Mediatek Inc.
    Inventor: Yu-Kai Chou
  • Publication number: 20100169808
    Abstract: An apparatus for providing a mobile streaming adaptor includes a processor configured to receive media content from a remote camera, process the received media content by capturing, encoding and encapsulating the media content at a mobile electronic device, connect to a remote streaming server through function of a mobile networked device; and stream the encapsulated media content to the mobile networked device for communication of the encapsulated content to the remote streaming server through an Internet Protocol (IP) network for real-time distribution to a communication device. A corresponding computer program product and method are also provided.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Inventors: Jen-Yu Yu, Hsin-Hua Lee, Chong-Yie Chang, Yeh-Kai Chou
  • Publication number: 20100154889
    Abstract: The invention provides an electrolyte composition and dye-sensitized solar cell using the same. The electrolyte composition includes a diionic liquid of Formula: Z? (X—Y—X)Z?, wherein X includes ammonium, imidazolium, pyridinium or phosphonium, Y is (CH2)n, n is an integer of 1-16, Z is I, and Z? is I, PF6, BF4, N(SO2CF3), NCS or N(CN)2.
    Type: Application
    Filed: May 9, 2009
    Publication date: June 24, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yung-Liang Tung, Jia-Yin Wu, Jen-An Chen, Wen-Yueh Ho, Yu Kai Chou