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:
Apr. 25, 1978
Filed:
Feb. 09, 1977
Applicant:
Inventor:
Arthur D Delagrange, Sykesville, MD (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H04B / ;
U.S. Cl.
CPC ...
328167 ; 328 14 ; 328160 ; 328166 ; 328133 ;
Abstract
An a.c. coupled, low-pass translating filter in which quadrature phases of n input signal spectrum are, in three successive balanced modulator stages driven by quadrature phases of externally generated carrier signals, alternately modulated-up and demodulated-down, and the sum of the remaining spectra is, in a final stage, demodulated below the cutoff frequency. Each stage terminates with a low-pass filter in which odd harmonics of the carrier frequencies and double frequencies generated in the second and final stages are eliminated.