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. 21, 1985
Filed:
Feb. 21, 1984
Frank J Cerny, Jr, North Riverside, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An improved large dynamic range multiplier is disclosed that provides substantially ideal multiplication for signals within a maximal-ratio predetection diversity combiner. Linear product multiplication is necessary in the second mixing stage of the maximal-ratio predetection diverstiy combiner, where it is essential that the mixer product signal be proportional to the product of its input signals, which each have a dynamic range in excess of 40 db. The multiplier, which in the preferred embodiment of the present invention is a field-effect-transistor device, provides a product signal that has a linear dynamic range approaching 130 db, far in excess of the 80 db necessary to accommodate typical input signals having a 40 db dynamic range.