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, 1996
Filed:
Sep. 21, 1994
Dung Hieu Nguyen, Houston, TX (US);
Houston Industries Incorporated, Houston, TX (US);
Abstract
An interface circuit for converting high current output signals provided by a test equipment to corresponding low voltage signals for testing digital relays used in power transmission systems. The high current signal outputs range in value between 0.001 and 26 amperes. The interface circuit includes a current sensing resistor for converting the high current output signal provided by the test equipment to a low voltage signal. The low voltage signal is amplified to the appropriate voltage level to correspond to the test equipment current signal output. The gain of the amplifier is adjustable using a potentiometer to allow the interface circuit to be used with different digital relays having different input signal requirements.