Patents Assigned to CrystalMedia Technology, Inc.
  • Publication number: 20090036065
    Abstract: A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal.
    Type: Application
    Filed: August 1, 2007
    Publication date: February 5, 2009
    Applicant: CRYSTALMEDIA TECHNOLOGY, INC.
    Inventor: Christopher Siu
  • Publication number: 20080175337
    Abstract: A frame synchronization method is disclosed. The method comprises correlating a stream with a pattern to generate a correlated result c(t). A first peak and a second peak are selected from the correlated result c(t), wherein the first peak is the peak with highest amplitude, and the second peak is the peak occurring later than the first peak with the second highest amplitude. The peak ratio of the two peaks is computed, and the position of the frame boundary is determined according to the ratio.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 24, 2008
    Applicant: CRYSTALMEDIA TECHNOLOGY, INC.
    Inventor: Po-Yuen Cheng
  • Publication number: 20080002597
    Abstract: A transceiving system utilizing a shared filter module is provided. The shared filter module is selectively filtering signals in a first band in a first mode and a second band in a second mode. The first mode is a receiver mode whereas the second mode is a transmission mode. The shared filter module comprises a compound filter comprising two low pass filters and a coupling controller to manage input and output wiring of the low pass filters. When the coupling controller is enabled in the first mode, the compound filter acts as a bandpass filter. When the coupling controller is disabled, the compound filter acts as two independent low pass filters.
    Type: Application
    Filed: September 11, 2007
    Publication date: January 3, 2008
    Applicant: CRYSTALMEDIA TECHNOLOGY, INC.
    Inventors: Yiping Fan, Chieh-Yuan Chao
  • Patent number: 7254175
    Abstract: A method and apparatus for generating universal splice point adapters, where during a splicing operation an “out-point splicing adapter” is used to transition from an exit stream, while an “in-point splicing adapter” is used to transition to an entry stream.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: August 7, 2007
    Assignee: CrystalMedia Technology, Inc.
    Inventors: Robert Norman Hurst, Jr., Christopher Ward, Clifford Pecota, Xiaobing Lee, Gary Hughes