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A charge pump circuit that can effectively reduce the area

A charge pump and circuit technology, applied in the direction of conversion equipment, electrical components, and output power conversion devices without intermediate conversion to AC, can solve the problems of slow setup time, waste of resources, etc., to reduce the time used and reduce the area. Effect

Active Publication Date: 2019-11-26
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A fast settling time is required, and a 2.5v charge pump with strong capability is necessary. However, the settling time of the 2.5V charge pump in the prior art is relatively slow, and during the establishment of the 2.5V charge pump, the programmed charge pump does not work, which is a waste of time. resources

Method used

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  • A charge pump circuit that can effectively reduce the area
  • A charge pump circuit that can effectively reduce the area
  • A charge pump circuit that can effectively reduce the area

Examples

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Embodiment Construction

[0031] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] The purpose of this invention is to let the idle programming charge pump work together with 2.5v to reduce the flash memory wake-up time, but if the programming charge pump is directly used to generate 2.5v, the efficiency is very low and the ability is not strong, so this process will make the programming charge pump Each stage is connected in parallel. When the internal 2.5v is...

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PUM

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Abstract

The invention discloses a charge pump circuit capable of effectively reducing the area, comprising: an input stage charge pump module, an intermediate stage charge pump module, an output stage charge pump module, a charge pump input and output control signal generation module, a clock generation module and a control In the circuit, the present invention connects each charge pump in series or in parallel through the control signal, which not only reduces the area of ​​the charge pump, but also reduces the time for flash memory to wake up.

Description

technical field [0001] The invention relates to a charge pump circuit, in particular to a charge pump circuit which can effectively reduce the area. Background technique [0002] Super eflash (ultra-fast flash memory) requires different high voltages under different operations, as follows; [0003] 1) Read operation: 2.5v voltage is required, and the output load is 100uA~200uA, depending on the read speed and wake-up time; [0004] 2) Program operation: 2.5v voltage load is required to be 100uA; 8.2v voltage load is 100uA (according to 0.38um^2cell, 8bits program programming); [0005] 3) Erase operation (erase operation): requires a small 2.5v voltage load; 12v voltage load is designed for 30uA. [0006] It can be seen that three voltages of 2.5v / 8.2v / 12v are required inside the super eflash. Since the 8.2 and 12v voltages are relatively close, the same charge pump will be used to generate 8.2v&&100uA or 12v&&30uA, a total of two charges pump, that is, a 2.5V read charge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07H02M1/44
CPCH02M1/44H02M3/073H02M3/075H02M3/077
Inventor 黄明永
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP