Patents by Inventor Wei-Chen WEN

Wei-Chen WEN 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).

  • Balanced frequency mixer circuit
    Patent number: 8829974
    Abstract: A frequency mixer circuit includes a mixer, a load stage, and again stage. The load stage cooperates with the mixer to generate a differential output voltage signal with a mixed frequency according to a differential local oscillator voltage signal and a differential input voltage signal. The gain stage has a transconductance, and a magnitude of the differential current signal and the transconductance have a positive relationship therebetween, so as to result in a positive relationship between the transconductance and a conversion gain which is a ratio of magnitude of the differential output voltage signal to magnitude of the differential input voltage signal.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: September 9, 2014
    Assignee: National Chi Nan University
    Inventors: Tzung-Min Tsai, Yo-Sheng Lin, Wei-Chen Wen
  • Down-conversion frequency mixer circuit
    Patent number: 8803586
    Abstract: A frequency mixer circuit includes a gain stage and a mixer. The gain stage has a specific circuit design to convert a differential input voltage signal into a differential current signal with an input frequency. The mixer receives a differential local oscillator (LO) voltage signal with a LO frequency, and the differential current signal from the gain stage, and outputs a differential output voltage signal having a mixed frequency associated with the input frequency and the LO frequency.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: August 12, 2014
    Assignee: National Chi Nan University
    Inventors: Jen-How Lee, Yo-Sheng Lin, Wei-Chen Wen
  • BALANCED FREQUENCY MIXER CIRCUIT
    Publication number: 20140197874
    Abstract: A frequency mixer circuit includes a mixer, a load stage, and again stage. The load stage cooperates with the mixer to generate a differential output voltage signal with a mixed frequency according to a differential local oscillator voltage signal and a differential input voltage signal. The gain stage has a transconductance, and a magnitude of the differential current signal and the transconductance have a positive relationship therebetween, so as to result in a positive relationship between the transconductance and a conversion gain which is a ratio of magnitude of the differential output voltage signal to magnitude of the differential input voltage signal.
    Type: Application
    Filed: July 12, 2013
    Publication date: July 17, 2014
    Inventors: Tzung-Min TSAI, Yo-Sheng LIN, Wei-Chen WEN