Static information storage and retrieval – Read only systems – Resistive
Patent
1994-04-01
1995-05-23
Clawson, Jr., Joseph E.
Static information storage and retrieval
Read only systems
Resistive
365148, 3652257, 257 50, 257530, G11C 1700
Patent
active
054187389
ABSTRACT:
A programmable storage element for redundancy-programing includes a programmable antifuse circuit, which includes a plurality of first resistors and a switching circuit for coupling the first resistors in series in response to a plurality of first control signals and for coupling the first resistors in parallel in response to a plurality of second control signals to permit programing of the first resistors, and a sensing circuit for determining whether or not the first resistors have been programmed. The state of the first resistors is determined by comparing a first voltage drop across the first resistors with a second voltage drop across a second resistor. Each of the first resistors is an unsilicided polysilicon conductor which has an irreversible resistance decrease when a predetermined threshold current is applied for a minimum period of time.
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Abadeer Wagdi W.
El-Kareh Badih
Ellis Wayne F.
Galbi Duane E.
Hiltebeitel Nathan R.
Clawson Jr. Joseph E.
International Business Machines - Corporation
Powell, Jr. Raymond H. J.
Turner Richard C.
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