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. 02, 1979
Filed:
Nov. 18, 1976
Karl-Diether Nutz, Heilbronn, DE;
Licentia Patent-Verwaltungs-G.m.b.H, Frankfurt, DE;
Abstract
A zero axis crossing detector for integrated bipolar circuits comprising two current paths connected in parallel to the input for the alternating current signal, for receiving direct current alternately in each path in dependence on the positive and negative half cycles of the alternating current signal and blocking both current paths during zero phases of the alternating current signal, a contant current source providing a direct current output across the paths during positive and negative half cycles and a transistor in each current path connected in a current mirror circuit and connected to provide the same current values of the current supplied by the constant current source in both current paths.