Integrated semiconductor memory

US5253209A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Kurt Hoffmann · Taufkirchen, DE
• Oskar Kowarik · Grafing, DE
• Rainer Kraus · Hersbruck, DE
• Bernhard Lustig · Munich, DE
• Hans-Dieter Oberle · Puchheim, DE

Key dates

• Filing date: Jul 26, 1991
• Grant date: Oct 12, 1993
• Expiry date: Jul 26, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G11C11/4096
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An integrated semiconductor memory includes a memory cell field having memory cells disposed in matrix form, word lines and internal bit lines forming pairs of internal bit lines for triggering the memory cells. Internal weighting circuits are each assigned to a respective one of the internal bit line pairs. An external pair of bit lines is commonly assigned to the internal bit lines. Pairs of separation transistors are each assigned to a respective one of the internal bit line pairs for electrical separation of the respective internal bit line pair from the external pair of bit lines. A bit line decoder triggers the pairs of separation transistors. An external weighting circuit is provided. A discriminator device and a precharging device are connected to the external bit line pair. The internal bit lines of each pair of internal bit lines are triggered separately from one another. The internal bit lines of each pair of internal bit lines are connected to the external bit line pair separately from one another.