Patents by Inventor Soon-Jyh Chang

Soon-Jyh 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).

  • Patent number: 7724063
    Abstract: A pseudo-differential switched-capacitor circuit using integrator-based common-mode stabilization technique is disclosed. A pseudo-differential switched-capacitor circuit with the differential floating sampling (DFS) technique has a common-mode gain value of one (1). An integrator is electrically coupled to the differential positive/negative outputs of the DFS circuit, and the integrator feeds back integrator output to the DFS circuit by detecting common-mode voltage disturbance at the differential positive output (Vout+) and negative output (Vout?), thereby stabilizing output common-mode level of the differential positive output (Vout+) and negative output (Vout?) at a desirable level.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: May 25, 2010
    Assignees: Himax Media Solutions, Inc., NCKU Research and Development Foundation
    Inventors: Soon-Jyh Chang, Jin-Fu Lin, Chih-Haur Huang
  • Publication number: 20100085225
    Abstract: A successive approximation ADC is disclosed. A comparator receives and compares a sampled input signal and an output of a DAC. Non-binary successive approximation register (SAR) control logic controls sampling of the input signal and controls a sequence of comparisons based on comparison result of the comparator. The SAR control logic controls each comparison when signal or charge in the DAC has not been completely settled. A binary-error-tolerant corrector is then used to compensate the sampling error.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 8, 2010
    Inventors: Soon-Jyh Chang, Chun-Cheng Liu, Chih-Haur Huang
  • Publication number: 20100085227
    Abstract: An analog-to-digital converter (ADC) for pipelined ADCs or cyclic ADCs is disclosed. The ADC includes at least one pair of two stages connected in series, and the two stages have different bits of resolution. An amplifier is shared by the pair of two stages such that the two stages operate in an interleaved manner. Accordingly, this stage-resolution scalable opamp-sharing technique is adaptable for pipelined ADC or cyclic ADC, which substantially reduces power consumption and increases operating speed.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 8, 2010
    Inventors: Soon-Jyh Chang, Jin-Fu Lin, Chih-Haur Huang
  • Publication number: 20090112499
    Abstract: The device for jitter measurement and a method thereof are provided. The device for jitter measure includes a signal retrieving module, a signal amplifying module, an edge detecting module, and a time-to-digital converting module. The signal retrieving module receives a signal-under-test, and retrieves a first pulse signal having a pulse width equal to a period of the signal-under-test. The signal amplifying module amplifies the pulse width of the first pulse signal and thereby generates a second pulse signal. The edge detecting module detects a rising edge and a falling edge of the second pulse signal, and generates a first indication signal and a second indication signal according to the respective detected results. The time-to-digital converting module converts the pulse width of the second pulse signal existed in time domain to a digital signal according to the first indication signal and the second indication signal.
    Type: Application
    Filed: May 8, 2008
    Publication date: April 30, 2009
    Applicants: HIMAX TECHNOLOGIES LIMITED, NCKU RESEARCH & DEVELOPMENT FOUNDATION
    Inventors: An-Sheng Chao, Soon-Jyh Chang, Chih-Haur Huang, Kuo-Chan Huang, Shih-Ming Luo