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:
Mar. 03, 1987
Filed:
Mar. 08, 1985
Lazare Argintaru, Pre Saint Gervais, FR;
Michel Beuzer, Juvisy Sur Orge, FR;
Alcatel Thomson Faisceaux Hertziens, Levallois Cedex, FR;
Abstract
The ultrahigh frequency responsive filter according to the invention comprises an ultrahigh frequency oscillator associated with a rapid phase lock loop. The loop comprises a mixer connected with the output of the oscillator and with the output of a synthesizer. A phase comparator receives a band frequency outputted from the mixer and a phase modulated carrier signal to be filtered. The loop also has an amplifier and a low-pass filter circuit receiving the output signal of the phase comparator. The output of the low pass filter is connected with the frequency control input of the oscillator. Thus, the modulated carrier signal is transposed to the frequency of the voltage-controlled oscillator at the same time as it is subject to band pass filtering by the loop. The filter can be used for ultrahigh frequency filtering in directional radio links.