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:
Oct. 09, 1984
Filed:
Jun. 03, 1982
Fujitsu Ten Limited, Kobe, JP;
Fijitsu Limited, Kawasaki, JP;
Abstract
A constant-current source transistor, which exhibits a constant-current characteristic corresponding to the power source voltage of a sensor and is connected to an input signal terminal of an input circuit, such as a microprocessor. A first transistor is connected so that it may supply a current from the power source of the input circuit to the constant-current source transistor, and a second transistor is connected in parallel to the constant-current source transistor. When the signal level at the input signal terminal exceeds a predetermined value, the second transistor is turned ON to effect level control so the input signal level may not become excessively high and damage the input circuit.