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:
Sep. 24, 2002
Filed:
Jun. 25, 1999
Michael F. Black, Garland, TX (US);
Raytheon Company, Lexington, MA (US);
Abstract
An intermediate frequency signal ( ) is received by a difference frequency generator ( ). The intermediate frequency signal ( ) includes a pilot tone frequency. A band pass filter ( ) removes frequencies surrounding the pilot tone frequency. A phase lock loop ( ) generates a pilot tone signal from the pilot tone frequency. A divisor ( ) divides the frequency of the pilot tone signal by a specified number. A second phase detector ( ) determines a frequency difference between the pilot tone signal and a stable frequency signal generated by a stable frequency oscillator ( ). A control voltage for a difference frequency voltage controlled dielectric resonant oscillator ( ) is adjusted based on the frequency difference. A system frequency signal ( ) is downconverted to an intermediate frequency signal ( ) using a difference frequency signal ( ).