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:
Aug. 16, 1988
Filed:
Oct. 10, 1986
Jean-Luc Mate, Toulouse, FR;
Bendix Electronics S.A., Toulouse, FR;
Abstract
This interface enables the integrated circuit with which it is associated to be placed in a test configuration by applying to its test input terminal (2) a voltage higher than the power supply voltage (V.sub.cc) of the circuitry. In the rest state, the interface then supplies a low logic level to its output terminal (5). If the test command voltage is applied, this level changes state. The interface comprises, in particular, two transistors (M.sub.1, M.sub.2) of opposite types of conductivity which are fed by a constant current source (10, M.sub.5, M.sub.6). The interface switches over when the input transistor (M.sub.1) is put into the conducting state by the test command voltage so as to divert a fraction of the current flowing in the second transistor (M.sub.2). The input terminal (2) can at the same time be a functional input terminal of the integrated circuit.