Invention Grant
US08259515B2 Circuitry for reading phase-change memory cells having a clamping circuit
有权
用于读取具有钳位电路的相变存储单元的电路
- Patent Title: Circuitry for reading phase-change memory cells having a clamping circuit
- Patent Title (中): 用于读取具有钳位电路的相变存储单元的电路
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Application No.: US12491352Application Date: 2009-06-25
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Publication No.: US08259515B2Publication Date: 2012-09-04
- Inventor: Ferdinando Bedeschi , Claudio Resta
- Applicant: Ferdinando Bedeschi , Claudio Resta
- Applicant Address: US MI Troy
- Assignee: Ovonyx, Inc.
- Current Assignee: Ovonyx, Inc.
- Current Assignee Address: US MI Troy
- Agency: Trop, Pruner & Hu, P.C.
- Main IPC: G11C7/06
- IPC: G11C7/06

Abstract:
A read circuit for reading at least one memory cell adapted to storing a logic value, the at least one memory cell including: a storage element made of a phase-change material; and an access element for coupling the storage element to the read circuit in response to a selection of the memory cell, the read circuit including: a sense current supply arrangement for supplying a sense current to the at least one memory cell; and at least one sense amplifier for determining the logic value stored in the memory cell on the basis of a voltage developing thereacross, the at least one sense amplifier comprising a voltage limiting circuit for limiting the voltage across the memory cell for preserving the stored logic value, wherein the voltage limiting circuit includes a current sinker for sinking a clamping current, which is subtracted from the sense current and depends on the stored logic value.
Public/Granted literature
- US20090285016A1 Circuit for Reading Memory Cells Public/Granted day:2009-11-19
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