EP 0229081 A4 19900322 - PROGRAMMABLE READ ONLY MEMORY ADAPTIVE ROW DRIVER CIRCUIT AND OUTPUT CIRCUIT.

Title (en)

PROGRAMMABLE READ ONLY MEMORY ADAPTIVE ROW DRIVER CIRCUIT AND OUTPUT CIRCUIT.

Title (de)

ANPASSUNGSFÄHIGES ZEILENTREIBERSCHALTUNG UND AUSGANGSSCHALTUNG FÜR PROGRAMMIERBAREN NUR-LESE-SPEICHER.

Title (fr)

CIRCUIT ADAPTATIF DE COMMANDE DE RANGEES POUR UNE MEMOIRE MORTE PROGRAMMABLE ET CIRCUIT DE SORTIE.

Publication

EP 0229081 A4 19900322 (EN)

Application

EP 86903104 A 19860509

Priority

US 75308385 A 19850709
US 75308485 A 19850709

Abstract (en)

[origin: WO8700338A1] An I<2>L programmable read only memory (26) operates in the read mode at very low power levels and at voltages down to 1 Volt. Switching between modes is accomplished merely by changing the voltage on the B+ terminal; 1-3 Volts for the read mode and 9-12 Volts for the program mode. The memory includes a row driver circuit (e.g. 40) to sink current from a row (e.g. 60) of memory elements when selectively activated. The row driver circuit has two current sinking capabilities, a low current capability for the read mode and a high current capability for the program mode. The memory also includes an output circuit (e.g. 80) that has a selectable dual non-inverting input differential amplifier (424-440) with each non-inverting input connected to a different column (e.g. 340) of memory elements. To program the memory elements, the output circuit includes two selectable programming current sources (402-410, 412-420) which self extinguish as soon as the memory element being programmed changes from its unprogrammed to its programmed state.

IPC 1-7

G11C 7/00; G11C 8/00; G11C 17/06

IPC 8 full level

G11C 17/06 (2006.01); G11C 17/18 (2006.01)

CPC (source: EP KR)

G11C 7/00 (2013.01 - KR); G11C 17/06 (2013.01 - EP); G11C 17/18 (2013.01 - EP)

Citation (search report)

[A] GB 2089161 A 19820616 - RAYTHEON CO
[A] EP 0019381 A1 19801126 - FUJITSU LTD [JP]
[A] EP 0098215 A2 19840111 - FUJITSU LTD [JP]
[A] GB 2118797 A 19831102 - CITIZEN WATCH CO LTD
See references of WO 8700338A1

Designated contracting state (EPC)

DE FR GB IT NL SE

DOCDB simple family (publication)

WO 8700338 A1 19870115; EP 0229081 A1 19870722; EP 0229081 A4 19900322; KR 880700421 A 19880315

DOCDB simple family (application)

US 8601036 W 19860509; EP 86903104 A 19860509; KR 870700197 A 19870307