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:
Jan. 27, 1976
Filed:
Jun. 28, 1974
Paul E Stuckert, Katonah, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The broad band directional signal generator disclosed generates signals on a transmission line, which, controllably propagate in one direction on the line to the exclusion of the other direction, or in both directions. Such signal generation may occur at one or a multiplicity of points located at arbitrary positions along the line. The signal generator includes a conventional .pi., 0, T, or H attenuator network and operates in conjunction with other circuitry. In the disclosed embodiments, symmetrical attenuators are used with either single ended or push-pull amplifiers connected to the attenuator nodes. The invention, however, is equally applicable to .pi., 0, T, or H attenuator networks which are not symmetrical. The specific embodiments shown employing active devices and direct coupling have wide frequency responses which are flat and flat to DC. Where operation down to DC is not required, AC or transformer coupling may be used. The circuits disclosed have applications in analog and digital communication paths where two-way information flow exists and where a multiplicity of ports may share the same path.