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:
Aug. 28, 1984
Filed:
Sep. 15, 1982
Paul G Jagnow, Iowa City, IA (US);
David K Vail, Cedar Rapids, IA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.