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:
Jun. 11, 1991
Filed:
Jun. 21, 1990
Murat Gumussoy, Reading, GB;
Orbitel Mobile Communications Limited, Bracknell, GB;
Abstract
The apparatus is for digitizing demodulated frequency shift key modulated data signals, and comprises a differentiating circuit arranged to receive the demodulated data signal, and produce differentiated pulses at an output thereof. First and second comparators are arranged to receive the differentiated pulses, and compare the pulses with respective reference voltages to generate output pulses when pulses above and below the respective reference voltages are detected. The outputs of the comparators are connected to the set and reset inputs respectively of a flip-flop, causing a digitized form of the input demodulated signal to be generated at an output of the flip-flop.