The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Aug. 10, 1988
George I Tsuda, Fullerton, CA (US);
Kernel S Tsuhako, Cerritos, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
The invention comprises a frequency converter for converting an input frequency to an output frequency where the frequenicies are widely separated. The system includes a free running output oscillator adapted to be injection locked to an output frequency. A local oscillator having a frequency near the output frequency, has its signal mixed with the input frequency to obtain a signal containing sideband frequencies which are both above and below the local oscillator frequency. Means are provided for separating the sideband frequencies and applying one of the sidebands as an injection locking signal to the free running oscillator. In the preferred embodiment, the bandwidth of the free running output oscillator is centered above the highest sideband frequency if the sideband is lower in frequency than the frequency of the local oscillator or is centered below the lowest sideband frequency is the sideband is higher in frequency than the frequency of the local oscillator.