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Current mode sensitive amplifier and storage with sensitive amplifier

A sensitive amplifier and current mode technology, applied in the field of amplifiers, can solve the problems of different reading margin changes

Active Publication Date: 2014-02-19
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a current-mode sense amplifier and a memory with the sense amplifier, so as to solve the problem that the read margin changes differently when the existing current-mode sense amplifier assists the memory in reading margin, and realizes Read Margins Maintain Equal or Near Equal

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  • Current mode sensitive amplifier and storage with sensitive amplifier
  • Current mode sensitive amplifier and storage with sensitive amplifier
  • Current mode sensitive amplifier and storage with sensitive amplifier

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Embodiment Construction

[0043] The inventor found in the research that the clamping voltage V in the existing current mode sense amplifier IO It will be affected by temperature changes, so that the memory will reflect different read margins, specifically: the inverter in the feedback clamp circuit plays the role of clamping the node voltage, and the clamping voltage V IO The bias voltage provided to the storage unit for the feedback clamping circuit; in the existing current mode sense amplifier, the clamping voltage V IO with the flipping threshold of the inverter V TH positive correlation, while the flipping threshold of the inverter V TH will drift with temperature, causing the clamp voltage V IO Following the change, the bias voltage of the memory cell changes, which in turn causes the memory to reflect different read margins.

[0044] An embodiment of the present invention provides a current-mode sense amplifier that uses temperature compensation to read margin, and reduces the clamping voltag...

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Abstract

The embodiment of the invention provides a current mode sensitive amplifier. The current mode sensitive amplifier comprises a temperature compensation unit, a feedback clamping circuit, and a current comparator; the feedback clamping circuit comprises a first phase inverter with bias compensation; the temperature compensation unit is used for providing compensating current Ibias with a preset temperature coefficient, and transmits the compensating current Ibias into a bias input end of the first phase inverter; clamping node voltage input / output (VIO) of the first phase inverter is positively related to voltage gate-to-source (VGS) of an n-metal-oxide-semiconductor (NMOS) tube; the output end of the feedback clamping circuit is connected with a non-inverting input end of the current comparator so as to input current IMC which is acquired from a storage unit into the current comparator; and an inverting input end of the current comparator is connected with a reference storage unit and is used for acquiring current IMRC in the reference storage unit, and comparing the current IMC and the current IMRC to output current difference signals. The provided current mode sensitive amplifier ensures that read margins of the storage are kept equal or approximately equal.

Description

technical field [0001] The invention relates to the field of amplifiers, more specifically, to a current mode sense amplifier and a memory with the sense amplifier. Background technique [0002] The current-mode sense amplifier is one of the key circuits in the read path of the memory. Its function is to read the memory cell, compare it with the reference memory cell, and output the comparison result. A classic current mode sense amplifier in the prior art includes: a feedback clamp circuit and a current comparator. The input terminal of the feedback clamping circuit is connected with the storage unit, which provides the bias voltage V for the storage unit IO , to get the current I flowing through the memory cell MC , the output terminal of the feedback clamp circuit is connected with the non-inverting input terminal of the current comparator, so that the current I MC Pass the input current comparator; the inverting input terminal of the current comparator is connected wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C7/06
Inventor 杨诗洋陈岚陈巍巍龙爽
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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