Patents by Inventor Chao-Chi Yang

Chao-Chi Yang 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: 20120280700
    Abstract: A circuit for sensing a differential capacitance includes a charge-storing circuit to generate a first output voltage and a second output voltage related to capacitances at two terminals of the differential capacitance, respectively, an operational amplifier to amplify the difference between the first and second output voltages to generate a sensing value, a first sampling capacitor having one terminal connected to the negative input terminal and the other terminal receiving the first or second output voltage, and a second sampling capacitor having one terminal connected to the negative input terminal and the other terminal switched to the output terminal of the operational amplifier. The second sampling capacitor stores a non-ideal error value to offset the non-ideal effect of the operational amplifier imparted on the sensing value.
    Type: Application
    Filed: May 1, 2012
    Publication date: November 8, 2012
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: Chao-Chi YANG, Shih-How PENG
  • Publication number: 20120274340
    Abstract: A circuit and a method for sensing differential capacitance involve using plural storing capacitors to repeatedly sample charges of the differential capacitance in an over-sampling manner, and storing the charges sampled in different transfer rounds into different storing capacitors instead of repeatedly transferring charges for a single storing capacitor, so as to collect charge averages about both inputs and noises and in turn effectively reduce RF interference and source noises.
    Type: Application
    Filed: April 26, 2012
    Publication date: November 1, 2012
    Inventors: Chao-Chi YANG, Shih-How PENG
  • Publication number: 20120154298
    Abstract: A method for adjusting touch positions of software keyboard includes the following steps: a software keyboard is displayed on the touch screen. The preset characters are displayed respectively to receive at least one first touched position corresponding to each of the preset characters on the touch screen. A touched offset corresponding to each of the preset characters is calculated according to the at least one first touched position corresponding to each of the preset characters respectively. At least one touched boundary among each of the preset characters and the neighboring characters thereof is calculated according to the touched offset and the preset base center point corresponding to each of the preset characters respectively. A preset close-loop scope corresponding to each of the preset characters is calculated according to the touched boundaries respectively. Output characters according to the close-loop scopes touched.
    Type: Application
    Filed: April 4, 2011
    Publication date: June 21, 2012
    Applicant: INSTITUTE FOR INFORMATION INDUSTRY
    Inventors: Cheng-Han Wu, Chung-Wen Liao, Wen-Tang Chen, Chao-Chi Yang
  • Patent number: 7705755
    Abstract: The present invention provides a signal converting apparatus with built-in self test, including a first signal converting circuit, a second signal converting circuit, a comparing apparatus, a control logic apparatus and a voltage divider. The first and the second signal converting circuit take a first and a second reference voltage and are respectively controlled by a first and second set of control signals from the control logic apparatus for the comparing apparatus to generate a comparing result.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: April 27, 2010
    Assignee: Elan Microelectronics Corporation
    Inventors: Chao-Chi Yang, Yao-Ren Fan
  • Patent number: 7643014
    Abstract: A voltage is generated after a touch screen is touched, and the voltage is transformed into a digital signal for detecting a touch point which the touch screen is touched. A touch sensing system includes a first switch having a first node coupled to a first voltage source, a second switch having a node coupled to a second voltage source, a first resistor coupled between the first switch and the second switch in a series connection, a comparator having a first input node coupled to a second node of the first switch, a successive approximation register (SAR) having an input node coupled to an output node of the comparator, and a simulation circuit. An output voltage of the simulation circuit is continuously adjusted by the comparator and the simulation circuit to transform the voltage generated on the touch screen into a digital signal.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: January 5, 2010
    Assignee: Elan Microelectronics Corporation
    Inventors: Chao-Chi Yang, Chung-An Tang
  • Publication number: 20080158028
    Abstract: The present invention provides a signal converting apparatus with built-in self test, including a first signal converting circuit, a second signal converting circuit, a comparing apparatus, a control logic apparatus and a voltage divider. The first and the second signal converting circuit take a first and a second reference voltage and are respectively controlled by a first and second set of control signals from the control logic apparatus for the comparing apparatus to generate a comparing result.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 3, 2008
    Inventors: Chao-Chi Yang, Yao-Ren Fan
  • Publication number: 20070089914
    Abstract: A voltage is generated after a touch screen is touched, and the voltage is transformed into a digital signal for detecting a touch point which the touch screen is touched. A touch sensing system includes a first switch having a first node coupled to a first voltage source, a second switch having a node coupled to a second voltage source, a first resistor coupled between the first switch and the second switch in a series connection, a comparator having a first input node coupled to a second node of the first switch, a successive approximation register (SAR) having an input node coupled to an output node of the comparator, and a simulation circuit. An output voltage of the simulation circuit is continuously adjusted by the comparator and the simulation circuit to transform the voltage generated on the touch screen into a digital signal.
    Type: Application
    Filed: March 2, 2006
    Publication date: April 26, 2007
    Inventors: Chao-Chi Yang, Chung-An Tang
  • Patent number: 7158070
    Abstract: While transforming an analog input voltage into a digital signal including several bits, an analog-to-digital converter including a built-in self test (BIST) circuit is used for performing the transformation and compensating an offset error of the analog input voltage. The operations of the digital-to-analog converter include a self test mode and a normal mode. And each of the self test mode and the normal mode includes a sampling phase and a bit cycling phase.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: January 2, 2007
    Assignee: Elan Microelectronics Corporation
    Inventors: Chao-Chi Yang, Chung-An Tang
  • Patent number: D673567
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: January 1, 2013
    Inventor: Chao-Chi Yang
  • Patent number: D680122
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: April 16, 2013
    Inventor: Chao-Chi Yang