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

Circuitry for reading phase-change memory cells having a clamping circuit
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
Information query
Patent Agency Ranking
0/0