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:
Sep. 21, 1999
Filed:
Oct. 31, 1997
Garry C Gillette, San Jose, CA (US);
Credence Systems Corporation, Fremont, CA (US);
Abstract
A drive arrangement for a semiconductor integrated circuit tester having a tester pin connected by a transmission line to a terminal for engaging a pin of a semiconductor device under test (DUT) includes a driver having an output terminal which can be driven selectively to at least two voltage levels in response to a timing signal and multiple semiconductor resistive elements each having at least a first state, in which the resistive element is conductive, and a second state, in which the resistive element is substantially non-conductive. The resistive elements are connected as a two-terminal network between the output terminal of the driver and the tester pin. By selective control, the resistive elements can backmatch the characteristic impedance of the transmission line.