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. 07, 1986
Filed:
May. 10, 1983
Klaus Gillessen, Untergruppenbach, DE;
Christopher Malinowski, Bridgewater, NY (US);
Telefunken Electronic GmbH, Heilbronn, DE;
Abstract
An arrangement with several phototransistors wherein the phototransistors are interconnected in such a way that n (n-1) (n-2) phototransistors can be triggered with n leads, n being one whole number larger than or equal to 3, the three connections emitter, base and collector of each phototransistor being connected to three different leads, no two phototransistors being connected in the same way to the same leads, the leads being able to take on three states, i.e., (1) grounded, (2) open and (3) connected to a voltage source, of the leads at a certain point in time only one lead being open and only one other lead being connected to the voltage source, the voltage source, on the one hand, being so small that it cannot drive a noticeable current over the base-emitter path of each phototransistor, but, on the other hand, being sufficiently large to be able to drive a noticeable current over the collector-emitter path of a phototransistor if this phototransistor is illuminated, and a flow of current being ascertainable for each lead when this lead is in the grounded state.