Very large scale integrated circuit

US4329640A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Hans Reiner · Linkenheim-Hochstetten, DE
• Werner Auth · Stuttgart, DE

Key dates

• Filing date: May 24, 1979
• Grant date: May 11, 1982
• Expiry date: May 24, 1999

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/3185
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A monolithically very large scale integrated circuit (VLSI) having any arbitrarily given structure and an internal test circuit only requiring one, two or three additional outer terminals wherein the test circuit is integrated therein. In one embodiment the test circuit contains a counter and a combinational circuit interconnected with the counter reading outputs thereof as well as selection switches associated with test points and where the first of the additional terminals is connected to the counting input of the counter.