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. 29, 1989
Filed:
Oct. 30, 1987
Edward A Ostertag, Thousand Oaks, CA (US);
Teradyne, Inc., Boston, MA (US);
Abstract
Apparatus for testing leakage currents of input pins of an electronic device under test including a connector having a plurality of contacts for making electrical contact to respective input pins, a plurality of current measuring circuits connected to respective contacts of the connector for sensing leakage currents and providing analog outputs indicating current, a multiplexer connected to receive the analog outputs and selectively provide one analog output as a multiplexer output, and an analog-to-digital converter connected to receive the multiplexer output and provide a digital output indicating leakage current. Also disclosed are storing a limit value for each pin in a limit memory and comparing the limit values with the multiplexer outputs; using a plurality of digital-to-analog converters to selectively provide desired inputs to the input pins; and using a correction memory storing a correction value for each pin to correct the multiplexer output.