Patents by Inventor Thomas William Mewhort Frazer

Thomas William Mewhort Frazer 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).

  • Patent number: 10727887
    Abstract: A receiver apparatus coupled to receive an RF signal having frequency components in a desired band and an image band, includes: an image rejection filter; a local oscillator to produce a first signal; a frequency divider to produce a plurality of second signals; a first mixer, coupled to receive the RF signal and the first signal, to produce an intermediate signal; and a frequency translation filter including a plurality of mixers each coupled to receive the intermediate signal and a different one of the plurality of second signals; and at least one impedance coupled as a load to each of the plurality of mixers, wherein: the image rejection filter and the frequency translation filter are configured to operate in conjunction to form a band-pass filter in the desired band and a band-stop filter in the image band and to apply the band-pass filter and band-stop filter to the RF signal.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: July 28, 2020
    Assignee: u-blox AG
    Inventors: Mici McCullagh, Thomas William Mewhort Frazer