Flash sense amplifier

Abstract

The invention discloses a Flash sense amplifier, which comprises a first inverter, a second inverter, a first amplification control unit, a second amplification control unit, a unit array bit line, a first latch control unit, a reference array bit line and a second latch control unit, wherein the first amplification control unit is used for controlling the make-and-break between an input end of the first inverter and an output end of the second inverter; the second amplification control unit is used for controlling the make-and-break between the output end of the first inverter and the input end of the second inverter; the unit array bit line is used for providing unit bit line potential; the first latch control unit is used for controlling the make-and-break between the unit array bit line and the input end of the first inverter; the reference array bit line is used for providing reference bit line potential; and the second latch control unit is used for controlling the make-and-break between the reference array bit line and the input end of the second inverter. The Flash sense amplifier separates the input of the amplifier from the sense amplification, and reduces the influences of the bit line stray capacitance on the amplifier.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a Flash sensitive amplifier. Background technique [0002] Flash is widely used in modern integrated circuits. U disks, digital cameras, and SD cards in smart phones that people are familiar with are all designed based on the Flash structure. Flash performance has become an important direction of IC design. For memory, the speed of reading largely determines the speed of circuit work. With the reduction of the proportionality rules of integrated circuits, the parasitic capacitance on the bit line of a column of memory cells is driven, which becomes the biggest limiting factor in the circuit reading process. The sensitive amplifier is the most important circuit unit structure in the readout channel, and its sensitive amplification speed directly determines the readout speed of the Flash circuit. [0003] Generally common amplifiers use a differential circuit or a c...

AI Technical Summary

Problems solved by technology

[0004] One disadvantage of this circuit is that any signal change will bring about a change in the working state of the circuit, resulting in circuit power consumption, even in the stage where no read operation is required

Its biggest advantage is that the amplifier tube can avoid the loss of the leakage voltage caused by the tail control tube. The amplifier tube can work between VDD and GND, and the amplified current is larger and the speed is faster; but it does not solve the problem that the bit line is larger The problem of the effect of parasitic capacitance on the amplifier

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