Patents by Inventor Hsian-Feng Liu

Hsian-Feng Liu 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: 20120226852
    Abstract: A DRAM controller including a judging module, a determination module, and a transmission module is provided. The judging module judges an address content difference between a first command and a third command. The determination module determines a plurality of buffering address contents, asoociated with at least one second command, according to the address content difference. The transmission module then sequentially transmits the first command, the at least one second command, and the third command to the DRAM.
    Type: Application
    Filed: June 24, 2011
    Publication date: September 6, 2012
    Applicant: MStar Semiconductor, Inc.
    Inventors: CHUNG-CHING CHEN, Hsian-Feng Liu, Yu-Lin Chen
  • Patent number: 8237470
    Abstract: A universal IO unit applied to a chip or an integrated circuit is provided. The universal IO unit includes a power pad and a plurality of signal pads for providing different functions. According to functional requirements of the universal IO unit, the pad power is selectively connected to an electric wire to couple to a predetermined voltage, and each of the signal pads is also selectively connected to a signal wire to transceive signals.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: August 7, 2012
    Assignee: MStar Semiconductor, Inc.
    Inventors: Hsian-Feng Liu, Eer-Wen Tyan
  • Publication number: 20120057262
    Abstract: A transmitter comprises a protection circuit; a first termination resistor having a first end coupled to a first voltage source, and a second end coupled to the protection circuit; a second termination resistor having a first end coupled to the first voltage source, and a second end coupled to the protection circuit, wherein the second end of the first termination resistor and the second end of the second termination resistor form a differential output pair; a current switch coupled to the protection circuit; a current source coupled to the current switch; and a pre-driver circuit coupled to the current switch, for controlling the current switch, making the differential output pair generate an output current. Wherein, the pre-driver circuit receives a second voltage source, and the first voltage source is higher than the second voltage source.
    Type: Application
    Filed: March 29, 2011
    Publication date: March 8, 2012
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Chun-Wen Yeh, Hsian-Feng Liu
  • Publication number: 20120025894
    Abstract: A multi-mode output transmitter includes a pair of driving circuits and a pair of common circuits. Each of the driving circuits includes an n-channel metal-oxide-semiconductor field-effect transistor (MOSFET), and each of the common circuits includes a p-channel MOSFET. In one transmission mode, one of the pair of common circuits and one of the pair of driving circuits complementarily conduct; and in another transmission mode, the pair of common circuits simultaneously conduct to provide termination resistors.
    Type: Application
    Filed: April 29, 2011
    Publication date: February 2, 2012
    Applicant: MStar Semiconductor, Inc.
    Inventors: Shih Jyun Yang, Chun Wen Yeh, Hsian-Feng Liu
  • Publication number: 20110153963
    Abstract: A memory controller and an associated controlling method are provided. The memory controller is connected to a memory module, and includes a FIFO buffer for receiving valid data outputted from the memory module, a write pointer for indicating written data stored in the FIFO buffer, and a read pointer for indicating read data stored in the FIFO buffer. According to the controlling method, during a CAS latency of the memory module after a read command is generated, the value of the write pointer is controlled to have the same value as that of the read pointer.
    Type: Application
    Filed: December 22, 2010
    Publication date: June 23, 2011
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Yo-Lin Chen, Hsian-Feng Liu, Ming-Chieh Yeh
  • Publication number: 20110131354
    Abstract: A universal memory I/O generating apparatus includes a defining module, a retrieving module, a generating module, and a layout module. The defining module defines a mapping table according to a pin configuration of a plurality of I/Os. The mapping table includes corresponding relationships between the plurality of IOs and a plurality of memory functions. The retrieving module retrieves control information corresponding to the mapping table from candidate information, which is associated with the corresponding relationships between the plurality of I/Os and the plurality of memory functions. The generating module generates a hardware description language (HDL) file according to the control information. The layout module programs the plurality of I/Os according to the HDL file, so that each of the I/Os can correspond to its corresponding memory function.
    Type: Application
    Filed: November 17, 2010
    Publication date: June 2, 2011
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Sterling Smith, Hsian-Feng Liu, Eer-Wen Tyan, Chun-Chia Chen, Ming-Chieh Yeh, Chung-Ching Chen, Yo-Lin Chen
  • Publication number: 20110128042
    Abstract: A universal IO unit applied to a chip or an integrated circuit is provided. The universal IO unit includes a power pad and a plurality of signal pads for providing different functions. According to functional requirements of the universal IO unit, the pad power is selectively connected to an electric wire to couple to a predetermined voltage, and each of the signal pads is also selectively connected to a signal wire to transceive signals.
    Type: Application
    Filed: December 1, 2010
    Publication date: June 2, 2011
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Hsian-Feng Liu, Eer-Wen Tyan
  • Publication number: 20110128061
    Abstract: A phase generating apparatus generates an output clock having a desired phase according to a digital signal. The apparatus includes a phase selecting unit and a phase generating unit. The phase selecting unit selects one of a plurality of input clocks according to a portion of bits of the digital signal to generate a reference clock. Each of the input clocks respectively has a difference phase. The phase selecting unit divides the frequency of the reference clock, and selectively delays the frequency-divided reference clock according to another portion of bits of the digital signal to generate the output clock.
    Type: Application
    Filed: December 1, 2010
    Publication date: June 2, 2011
    Applicant: MSTAR SEMICONDUCTOR, INC.
    Inventors: Hsian-Feng Liu, Sterling Smith
  • Patent number: 7447511
    Abstract: A method and a device for equalizing mode selection are disclosed. The method comprises steps of: providing first sampling pulses in response to an equalized signal; providing second sampling pulses lagging behind the first sampling pulses for a pre-determined phase shift for sampling the equalized signal; establishing a first observing window and a second observing window according to the first sampling pulses and the second sampling pulses, so as to determine whether each of a plurality of equalizing modes is good or bad; and selecting one equalizing mode among the plurality of equalizing modes.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 4, 2008
    Assignee: Mstar Semiconductor, Inc.
    Inventors: Ke-Chiang Huang, Kuo-Feng Hsu, Jiunn-Yih Lee, Hsian-Feng Liu
  • Publication number: 20050270076
    Abstract: A method and a device for equalizing mode selection are disclosed. The method comprises steps of: providing first sampling pulses in response to an equalized signal; providing second sampling pulses lagging behind the first sampling pulses for a pre-determined phase shift for sampling the equalized signal; establishing a first observing window and a second observing window according to the first sampling pulses and the second sampling pulses, so as to determine whether each of a plurality of equalizing modes is good or bad; and selecting one equalizing mode among the plurality of equalizing modes.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 8, 2005
    Inventors: Ke-Chiang Huang, Kuo-Feng Hsu, Jiunn-Yih Lee, Hsian-Feng Liu
  • Patent number: 6400199
    Abstract: A fully differential double edge triggered flip-flop stores and outputs first and second fully differential input values on leading and trailing edges of a clock. The flip-flop includes a first fully differential master circuit, a second fully differential master circuit and a fully differential slave circuit. The first master circuit stores the first input value during the period from the leading edge to trailing edge of the clock. The second master circuit stores the second input value during the period from the trailing edge to leading edge of the clock. The slave circuit is electrically connected to outputs of the first and second master circuits. The slave circuit includes a second repeater as an output end of the flip-flop, outputs the first input value on the trailing edge of the clock, and outputs the second input value on the leading edge of the clock.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: June 4, 2002
    Assignee: Silicon Integrated Systems Corporation
    Inventors: Hung-Chih Liu, Hsian-Feng Liu