Patents Assigned to RDA TECHNOLOGIES LIMITED
  • Common interface/conditional access module and method of transmitting data between common interface card and integrated circuit chip thereof
    Patent number: 9361258
    Abstract: A common interface (CI)/conditional access (CA) module is used to transmit a conditional access data/command and a transport stream in an interleaving manner between a common interface card and an integrated circuit module having a conditional access module. With the aid of the CI/CA module, a same port can be shared for transmitting the conditional access data/command and the transport stream, instead of using two different and separated ports.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: June 7, 2016
    Assignee: RDA TECHNOLOGIES LIMITED
    Inventors: Feng-Chi Wei, Yu-Chung Wang, Hsiang-Chi Hsieh, Tsan-Hwi Chen
  • LNB frequency down conversion integrated circuit and chip, LNB frequency down conversion circuit and method
    Patent number: 8913702
    Abstract: The present invention discloses a type of LNB frequency down conversion integrated circuit. The present invention frequency-down-converts the RF signal with the Quadrature local oscillation signal (LO) and Quadrature Mixer. Then the 90 degree phase-shifting of the quadrature intermediate frequency (IF) signal after mixed is done by the use of passive Polyphase filter. The present invention further discloses a LNB frequency down conversion chip, a LNB frequency down circuit adopting the LNB frequency down conversion chip circuit and a method of LBN frequency down. The invention ensures the elimination of the minor image signal and the realization of the minor image suppression function.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: December 16, 2014
    Assignee: RDA Technologies Limited
    Inventors: Shunran Wei, Xunsong Yin
  • LNB FREQUENCY DOWN CONVERSION INTEGRATED CIRCUIT AND CHIP, LNB FREQUENCY DOWN CONVERSION CIRCUIT AND METHOD
    Publication number: 20130202071
    Abstract: The present invention discloses a type of LNB frequency down conversion integrated circuit. The present invention frequency-down-converts the RF signal with the Quadrature local oscillation signal (LO) and Quadrature Mixer. Then the 90 degree phase-shifting of the quadrature intermediate frequency (IF) signal after mixed is done by the use of passive Polyphase filter. The present invention further discloses a LNB frequency down conversion chip, a LNB frequency down circuit adopting the LNB frequency down conversion chip circuit and a method of LBN frequency down. The invention ensures the elimination of the minor image signal and the realization of the minor image suppression function.
    Type: Application
    Filed: May 10, 2011
    Publication date: August 8, 2013
    Applicant: RDA TECHNOLOGIES LIMITED
    Inventors: Shunran Wei, Xunsong Yin