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:
Feb. 09, 1988
Filed:
Jul. 07, 1986
Jorge Guzman-Edery, Lampertheim, DE;
Wolfgang Steiger, Lampertheim, DE;
BBC Aktiengesellschaft, Brown, Boverie & Cie, Baden, CH;
Abstract
A modulator for modulating binary data signals by frequency shift keying (FSK), in which a binary data level 1 is represented by a first frequency (f.sub.1) and the binary data level 0 is represented by a second frequency (f.sub.2) is provided. The modulator addresses a first addressing input of a programmable memory with the binary data signals, in which half the periods of the two frequencies (f.sub.1, f.sub.2) are marked in two memory regions (I, II) of the programmable memory addressed by the first addressing input. The modulator further controls other address inputs with a driven counter; and generates a pulse resetting the counter and controlling a 2:1 frequency divider having an output delivering one of the frequencies (f.sub.1, f.sub.2), when addressing a storage cell, in which one of the halfperiods is marked.