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. 25, 1985
Filed:
Dec. 27, 1982
Birney D Dayton, Nevada City, CA (US);
Dale L Leavitt, Auburn, CA (US);
The Grass Valley Group, Inc., Grass Valley, CA (US);
Abstract
A circuit receives an input logical signal of one polarity and converts it into two balanced logical output signals of the opposite polarity. The circuit comprises two resistors connected between a reference potential source of the polarity of the output signals and the terminals at which the output signals are provided. The circuit also comprises a current source. Each resistor has a resistance value such that when it is traversed by the current from the current source the potential difference between its ends is equal to the difference between the two possible potential levels of the output signals. A differential switching device responds to the input signal being at a first potential level by connecting one of the output terminals to the current source and isolating the other output terminal from the current source, and vice versa when the input signal is at a second potential level.