Patents by Inventor Cho-Jui Tsai

Cho-Jui Tsai 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).

  • Band converter and satellite television system thereof
    Patent number: 8291455
    Abstract: A band converter consists of a band-pass filter, a band-stop filter, a first power distributor, a local oscillator, a mixer, a switch circuit, a high-pass filter, a second power distributor, and a low-pass filter. The band-pass filter and the band-stop filter respectively filter a down-converted input signal to generate a first filtered signal and a second filtered signal. The first power distributor is coupled to the band-stop filter. The mixer is coupled to the first power distributor and the local oscillator. The switch circuit is coupled to the first power distributor and the mixer. The high-pass filter is coupled to the switch circuit. The second power distributor is coupled to the band-pass filter and the high-pass filter. The low-pass filter is coupled to the second power distributor.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: October 16, 2012
    Assignee: Wistron NeWeb Corporation
    Inventors: Cho-Jui Tsai, Chen-Chia Huang
  • Hairpin band pass filter and related frequency down converter
    Patent number: 8050650
    Abstract: A band pass filter includes a first micro-strip port for receiving a radio-frequency signal, a second micro-strip port for outputting a filtered radio-frequency signal and comprising at least one resonating cavity formed for enhancing rejecting effect of image frequency corresponding to the filtered radio-frequency signal, and a plurality of resonators arranged between the first micro-strip port and the second micro-strip port for performing band pass filtering on the radio-frequency signal to generate the filtered radio-frequency signal.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: November 1, 2011
    Assignee: Wistron NeWeb Corporation
    Inventors: Cho-Jui Tsai, Tzong-Jyh Chen
  • BAND CONVERTER AND SATELLITE TELEVISION SYSTEM THEREOF
    Publication number: 20100325669
    Abstract: A band converter consists of a band-pass filter, a band-stop filter, a first power distributor, a local oscillator, a mixer, a switch circuit, a high-pass filter, a second power distributor, and a low-pass filter. The band-pass filter and the band-stop filter respectively filter a down-converted input signal to generate a first filtered signal and a second filtered signal. The first power distributor is coupled to the band-stop filter. The mixer is coupled to the first power distributor and the local oscillator. The switch circuit is coupled to the first power distributor and the mixer. The high-pass filter is coupled to the switch circuit. The second power distributor is coupled to the band-pass filter and the high-pass filter. The low-pass filter is coupled to the second power distributor.
    Type: Application
    Filed: October 7, 2009
    Publication date: December 23, 2010
    Inventors: Cho-Jui Tsai, Chen-Chia Huang