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:
Nov. 30, 1993
Filed:
Dec. 30, 1991
Lisa F Kuegler, Tewksbury, MA (US);
Richard W Burrier, Groton, MA (US);
Steven G Labitt, Medford, MA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A calibration circuit includes a plurality of signal sources each of said signal sources having an output port and providing a signal having a known phase and a signal combiner circuit having a plurality of input ports and an output port with each of said input ports being coupled to a corresponding one of said signal source output ports. The calibration circuit further includes a switch having a common port and at least one branch port, said branch port being coupled to said output port of said signal combiner circuit and an analog to digital converter circuit having an input port coupled to the common port and an output port. The calibration circuit further includes a central processing unit coupled to the output port of said analog to digital converter and a summing circuit having a first input port coupled to said central processing unit, a second input port coupled to the output port of said analog to digital converter circuit and an output port.