Current mode sensitive amplifier and storage with sensitive amplifier

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 present invention relates to the field of amplifiers, and more particularly, to a current mode sense amplifier and a memory having 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. Classical current mode sense amplifiers in the prior art include: a feedback clamp circuit and a current comparator. The input terminal of the feedback clamp circuit is connected to the memory cell, and provides a bias voltage V for the memory cell IO , to obtain the current I flowing through the memory cell MC , the output terminal of the feedback clamp circuit is connected to the non-inverting input terminal of the current comparator, so that the current I MC Transfer to the current comparator; the inverting input terminal of the current comparator is connect...

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

Images