Patents by Inventor Kjartan Tafjord

Kjartan Tafjord 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).

  • Passive filter compensation network
    Patent number: 4135132
    Abstract: A compensation network for a passive filter which compensates for the variation of the loss attenuation of the filter dependent on ambient temperature variations consists of an L-section whose series arm is formed by a temperature dependent resistor and whose shunt arm is formed by another temperature dependent resistor in series with a resonant circuit. The resonance frequency value of the resonant circuit is chosen nearly equal to the band limit frequency of the filter.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: January 16, 1979
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventor: Kjartan Tafjord