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:
Dec. 25, 1984
Filed:
May. 26, 1982
Arnold Blum, Gechingen, DE;
Helmut Schettler, Dettenhausen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An integrated circuit chip includes a tristate driver which assumes an active logical state in response to a data signal at its data input and assumes a high impedance state in response to a control signal at its control input. The integrated circuit chip also includes a control signal generating network which is connected to the tristate driver's control input for producing the control signal. The control signal generating network may be tested by connecting the control signal generating network to the data input and overriding the control input to prevent the tristate driver from assuming the high impedance state. Thus, for testing purposes, the proper response of the control signal generating circuit may be ascertained by monitoring the active state of the tristate driver.