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. 17, 1991
Filed:
Feb. 16, 1990
Applicant:
Inventors:
Samuel Toliver, Rustburg, VA (US);
Gerald E Roberts, Lynchburg, VA (US);
Assignee:
Ericsson GE Mobile Communications Inc., Lynchburg, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324727 ; 324652 ; 324649 ;
Abstract
In coupled-dual resonator crystals, key parameters, such as resonator frequencies and synchronous peak separation frequency, are determined using a four frequency measuring process and apparatus wherein additional impedance is connected in parallel with the driving point impedance of the input resonator so as to allow the measurement of the critical frequencies above about 45 MHz.