Patents by Inventor Tso Chen

Tso Chen 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: 20090241139
    Abstract: The present invention relates to a tray used in an optical disc drive. At least two aligning means arranged in the tray for marking an aligning line at a front side and a back side of the tray, respectively. The aligning line is used determining the dimensional accuracy of each component located on the front side and back side of the tray, respectively.
    Type: Application
    Filed: May 28, 2009
    Publication date: September 24, 2009
    Inventors: Ke Rong Lin, Hsin-Tso Chen
  • Publication number: 20090212353
    Abstract: A non-volatile memory includes a substrate having two openings, a stacked gate structure disposed on the substrate between the two openings, a liner disposed on a bottom of each of the two openings and parts of a sidewall of each of the two openings, a second conductive layer disposed on the liner at the bottom of each of the two openings, and a third conductive layer on the second conductive layer and the liner. The stacked gate structure includes a first dielectric layer, a charge storage layer, a second dielectric layer, and a first conductive layer. The liner has a top surface lower than that of the substrate. The second conductive layer has a top surface co-planar with that of the liner. The third conductive layer has a top surface at least co-planar with that of the substrate and lower than that of the first dielectric layer.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: MACRONIX INTERNATIONAL CO., LTD.
    Inventors: Chin-Hsien Chen, Ying-Tso Chen, Chien-Hung Liu, Shou-Wei Huang
  • Patent number: 7572691
    Abstract: A method of fabricating a non-volatile memory is provided. First, two openings are formed on a substrate. A stacked gate structure comprising a first dielectric layer, a charge storage layer, a second dielectric layer and a first conductive layer is formed on the substrate between the two openings. A liner is formed on a bottom and a portion of a sidewall of the tow openings, wherein a top surface of the liner is lower than that of the substrate. A second conductive layer is formed on the liner at the bottom of the two openings, wherein a top surface of the second conductive layer is co-planar with that of the liner. A third conductive layer is formed on the second conductive layer and the liner, wherein a top surface of the third conductive layer is co-planar with that of the substrate and lower than that of the first dielectric layer.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: August 11, 2009
    Assignee: MACRONIX International Co., Ltd
    Inventors: Chin-Hsien Chen, Ying-Tso Chen, Chien-Hung Liu, Shou-Wei Huang
  • Publication number: 20090189808
    Abstract: A correlator for a GNSS receiver and a code generator used in the correlator as well as a correlation method are disclosed. In the GNSS, each satellite transmits a data signal and a pilot signal. The correlator is adaptable for executing correlation to the data signal, the pilot signal and various combinations thereof, such as non-coherent and coherent combinations. The code generator generates primary ranging codes of the data and pilot signals as well as various combinations thereof, such as sum or difference of the primary ranging codes of the data and pilot signals. By using the various codes, the correlator is adaptable and flexible for different correlation requirements.
    Type: Application
    Filed: January 28, 2008
    Publication date: July 30, 2009
    Applicant: MEDIATEK INC.
    Inventor: Kun-tso Chen
  • Publication number: 20090179796
    Abstract: A satellite search method and a receiver implementing such a method are disclosed. In the present invention, a predetermined range is sampled into multiple possible positions or space-time points, each of which is defined by a specific position and a time sample. The possible positions or points are sieved according to a search result of a satellite selected from candidate satellites each time. By repeatedly doing so, the finally remaining position will approach a user's position, and accordingly the candidate satellites converge to the most possible ones as to facilitate satellite search.
    Type: Application
    Filed: February 5, 2009
    Publication date: July 16, 2009
    Applicant: MEDIATEK INC.
    Inventor: Kun-tso Chen
  • Publication number: 20090135063
    Abstract: A satellite time dynamic search method and a receiver implementing such a method are disclosed. In the present invention, a predetermined period of time is sampled into multiple time samples. The time samples are sieved according to a search result of a satellite selected from candidate satellites each time. By repeatedly doing so, the finally remaining time sample will approach a true satellite system time, and accordingly the candidate satellites converge to the most possible ones as to facilitate satellite search.
    Type: Application
    Filed: January 21, 2009
    Publication date: May 28, 2009
    Applicant: MEDIATEK INC.
    Inventor: Kun-tso Chen
  • Publication number: 20090103656
    Abstract: A correlation device and method for different modulated signals such as BPSK signal and BOC signal. According to the present invention, the correlation device has one or more sections. Each section comprises a correlation unit for executing correlation; a first signal path for passing a received signal directly to the correlation unit; a second signal path for transferring a BOC signal into a BPSK-like signal and passing the signal to the correlation unit. The correlation unit has a multiplexer for selecting to allow an output of one of the first and second signal paths to be subject to signal correlation. The correlation results of the respective sections can be combined.
    Type: Application
    Filed: October 18, 2007
    Publication date: April 23, 2009
    Applicant: MEDIATEK Inc.
    Inventor: Kun-tso Chen
  • Publication number: 20090096668
    Abstract: A Doppler frequency searching method and correlator are disclosed. In the present invention, before Doppler frequency removal, a received signal is converted into digital form and the spreading code is removed. Then the signal is down-sampled to have a low sampling rate, which can be determined according to the maximum Doppler frequency to be searched. The Doppler frequency searching is done by stages. Each stage is in charge of a portion of the Doppler frequency to be removed. The sampling rate can be further reduced in each stage. Each stage can have a plurality of Doppler frequency removal units sharing the portion of Doppler frequency that the stage is to remove. Power consumption is reduced since Doppler frequency removal is executed with low sampling rate.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 16, 2009
    Applicant: MEDIATEK Inc.
    Inventor: Kun-tso Chen
  • Publication number: 20090045943
    Abstract: An authentication system for a wireless network is disclosed. The authentication system includes a card, a card reader, an end-user device, and a wireless access device. The card reader is coupled to the wireless access device. The card records a data, and the card reader reads the data recorded in the card. The wireless access device receives the data read by the card reader and performs authentication between the wireless access device and the end-user device according to the data.
    Type: Application
    Filed: October 24, 2007
    Publication date: February 19, 2009
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yu-Tso Chen, Teng-Jui Shih, Shin-Yan Chiou
  • Publication number: 20090028223
    Abstract: The invention provides a signal receiver. The signal receiver comprises a code removal module, a carrier removal module, a Fast Fourier Transformation (FFT) module, and a signal processor. The code removal module removes a pseudo random noise code from a first signal to obtain a second signal. The carrier removal module generates a carrier signal with a frequency of an estimated carrier frequency, generates at least one delta carrier signal with a frequency of the carrier frequency plus a delta frequency, removes the carrier signal from the second signal to obtain a third signal, and removes the delta carrier signal from the second signal to obtain a fourth signal. The FFT module derives a series of first FFT values from the third signal, and derives a series of second FFT values from the fourth signal.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 29, 2009
    Applicant: MEDIATEK INC.
    Inventor: Kun-Tso Chen
  • Patent number: 7453926
    Abstract: Methods and systems for detecting bit synchronization boundary in a received signal. A counter is set for defining a bit boundary of the received signal. Transitions in the received signal are detected and compared with the counter value as the transitions are expected to occur only at the bit boundary. The bit boundary is confirmed if a preset number of transitions aligned with the bit boundary.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 18, 2008
    Assignee: Mediatek Incorporation
    Inventors: Chun-Nan Chen, Kun-Tso Chen
  • Publication number: 20080240306
    Abstract: The invention provides a correlation device performing correlation on a received Global Navigation Satellite System (GNSS) signal. The correlation device comprises a first decimation module, a second decimation module, and a correlation module. The first decimation module decimates a plurality of samples of the received GNSS signal to obtain a plurality of decimated samples. The second decimation module decimates a plurality of code bits of a locally generated replica code to obtain a plurality of decimated code bits. The correlation module correlates the decimated samples with the decimated code bits to obtain a plurality of correlation results, thus achieving a coarse correlation between the received GNSS signal and the locally generated replica code.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 2, 2008
    Applicant: MEDIATEK INC.
    Inventors: Kun-Tso Chen, Jui-Ming Wei, Chun-Nan Chen
  • Publication number: 20080165057
    Abstract: A method and apparatus for collecting subframes of navigation data of satellites are disclosed. In the method of the present invention, the subframe is divided into several sub-units, each sub-units includes one or more words. When a receiver receives a subframe with a subframe ID, the respective required sub-units of the subframe are checked. A dummy sub-unit is not necessary to be considered. Valid ones of the required sub-units are collected. If not all the required sub-units of the subframe have been collected, the absent sub-units are to be collected when the next subframe with the same subframe ID is received. Some protection schemes can be applied to raise the reliability of such sub-unit collection. Especially when the signal is weak or unstable, the present invention may significantly improve the TTFF (Time To First Fix) performance of the receiver.
    Type: Application
    Filed: January 5, 2007
    Publication date: July 10, 2008
    Applicant: Media Tek Inc.
    Inventors: Kuan-i Li, Kung-shuan Huang, Kun-tso Chen
  • Publication number: 20080159198
    Abstract: A BOC signal acquisition and tracking apparatus and method. In the present invention, at least a BOC signal, a BOC-cos signal and a PRN coded signal are generated for a received signal. Depending on application condition (e.g. acquisition mode or tracking mode), autocorrelation of the BOC signal is combined with cross-correlation of the BOC signal and one of the BOC-cos signal and the PRN coded signal to generate a proper combined correlation result.
    Type: Application
    Filed: December 27, 2006
    Publication date: July 3, 2008
    Applicant: MediaTek Inc.
    Inventors: Chun-nan Chen, Kun-tso Chen, Jui-ming Wei
  • Publication number: 20080152044
    Abstract: An improved Viterbi decoding method for convolutionally encoded signals is disclosed. By using the method of the present invention, a trellis of Viterbi Algorithm (VA) for convolutionally encoded SBAS signal, for example, are arranged into butterflies. The butterflies are classified into groups according to branch metrics. Therefore, the butterflies can be effectively processed since the same butterfly processing kernel can be used repeatedly. Therefore, the code size and processing time can be reduced, so that Viterbi Algorithm can be more easily implemented by software.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Applicant: Media Tek Inc.
    Inventor: Kun-tso Chen
  • Publication number: 20080054322
    Abstract: A memory is provided. The memory includes a substrate, a number of parallel bit lines, a number of parallel word lines and at least a oxide-nitride-oxide (ONO) structure. The bit lines are disposed in the substrate. The word lines are disposed on the substrate. The word lines are crossed with but not perpendicular to the bit lines. The ONO structure is disposed between the word lines and the substrate.
    Type: Application
    Filed: August 30, 2006
    Publication date: March 6, 2008
    Applicant: MACRONIX INTERNATIONAL CO., LTD.
    Inventors: Chien-Hung Liu, Shou-Wei Huang, Ying-Tso Chen, Yu-Tsung Lin
  • Publication number: 20080048346
    Abstract: A method of forming a conductive line suitable for decreasing a sheet resistance of the conductive lines. The method comprises steps of providing a material layer having a conductive layer formed thereon and forming a patterned mask layer on the conductive layer. In addition, a portion of the conductive layer is removed by using the patterned mask layer as a mask and a spacer is formed on a sidewall of the patterned mask layer and the conductive layer. A portion of the conductive layer is removed until the material layer is exposed to form a conductive line, wherein the spacer and the patterned mask layer serve as a mask.
    Type: Application
    Filed: October 30, 2007
    Publication date: February 28, 2008
    Inventors: JUI-PIN CHANG, CHIEN-HUNG LIU, YING-TSO CHEN, SHOU-WEI HUANG
  • Publication number: 20080013604
    Abstract: A method for determining boundaries of information elements for a PRN code modulated signal is provided. The method of the present invention uses an estimated symbol phase of the received signal and correlation values of different durations to determine the information element boundary. By the method of the present invention, the determination of the information element boundary can be more effective especially in the common dump receiver architecture, where the correlation window cannot match the received waveform exactly.
    Type: Application
    Filed: July 17, 2006
    Publication date: January 17, 2008
    Applicant: Media Tek Inc.
    Inventor: Kun-tso Chen
  • Publication number: 20070284605
    Abstract: A casting adapted to carry a light emitting diode die and an anti-static die is disclosed. The casting comprises two electrodes for opposite electrodes and a wall. The light emitting diode die is mounted one of electrodes and the anti-static die is mounted on the other electrode. The wall is arranged between the light emitting diode die and the anti-static die. Further, the height of the wall is larger than that of the anti-static die to shade the anti-static die, whereby reflecting the light emitted from the light emitting diode die. Therefore, the reflection ratio of the light emitting diode die is improved, and the intensity generated by the whole light emitting diode is also improved.
    Type: Application
    Filed: September 12, 2006
    Publication date: December 13, 2007
    Inventors: Ying-Tso Chen, Teng-Huei Huang
  • Patent number: 7307018
    Abstract: A method of forming a conductive line suitable for decreasing a sheet resistance of the conductive lines. The method comprises steps of providing a material layer having a conductive layer formed thereon and forming a patterned mask layer on the conductive layer. In addition, a portion of the conductive layer is removed by using the patterned mask layer as a mask and a spacer is formed on a sidewall of the patterned mask layer and the conductive layer. A portion of the conductive layer is removed until the material layer is exposed to form a conductive line, wherein the spacer and the patterned mask layer serve as a mask.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: December 11, 2007
    Assignee: Macronix International Co., Ltd.
    Inventors: Jui-Pin Chang, Chien-Hung Liu, Ying-Tso Chen, Shou-Wei Huang