Memory circuit, a dynamic random access memory, a system comprising a memory and a floating point unit and a method for storing digital data

US7515456B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Peter Mayer · Neubiberg, DE
• Wolfgang Anton Spirkl · Germering, DE
• Markus Balb · Munich, DE
• Christoph Bilger · Munich, DE
• Martin Brox · Munich, DE
• Thomas Hein · Hersbruck, DE
• Michael Richter · Ottobrunn, DE

Key dates

• Filing date: Sep 11, 2006
• Grant date: Apr 7, 2009
• Expiry date: Sep 11, 2026

Classification

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

Abstract

A memory circuit comprises a D/A converter connected with an input/output circuit and with a writing circuit, wherein the D/A converter converts a digital data with at least two digital bits received from the input/output circuit to one analog value and forwards the analog value to the writing circuit, wherein the digital data is at least a part of a floating point number, wherein the writing circuit writes the analog value in at least one selected memory cell, and an A/D converter connected with a reading circuit and with the input/output circuit, wherein the reading circuit reads an analog value from a selected memory cell and forwards the analog value to the A/D converter, wherein the A/D converter converts the analog value to digital data, and wherein the A/D converter forwards the digital data to the input/output circuit. Furthermore, a method is provided for reading data from at least one memory cell of a memory, wherein an analog value is read from the memory cell and the analog value is corrected according to a correction factor representing a storage time the analog value was stored and wherein the corrected analog value is converted to digital data.