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. 01, 1991
Filed:
Nov. 30, 1988
Pieter C Pieket Weeserik, Hilversum, NL;
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
Digital circuit for shunting a ground separation plane, formed, for example, by a transformer, and present in a digital signal path. In this circuit a long sequence of equal bits offered to one side of such a ground separation plane must be conveyed further at the other side as a replica of said first bit sequence. Such sequences in essence represents a direct current. According to the invention, there is provided at the ingoing end of such a ground separation plane a modulator for up-modulating a bit stream applied thereto on a carrier frequency for which the ground separation plane is transparent. At the discharge end of the ground separation plane a demodulator is provided for down-modulation in such manner that a replica is obtained of the bit stream applied to the digital modulator. For such a modulator and such a demodulator use can be made of an XOR-gate or a D-flip-flop, respectively. A preferred use of the invention relates to a video circuit with A/D and D/A conversion, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile