Charge pump based on voltage multiplier cascade connection

A technology of voltage doubler and charge pump, which is applied in the field of DC-DC boosting to achieve high practical value, precise erasing operation, and cost reduction

Inactive Publication Date: 2012-10-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the above-mentioned technical defects existing in the prior art, the present invention provides a charge pump based on voltage doubler cascading, which can overcome the situation of overshoot voltage and excessive ripple voltage caused by wide input voltage range

Method used

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  • Charge pump based on voltage multiplier cascade connection
  • Charge pump based on voltage multiplier cascade connection
  • Charge pump based on voltage multiplier cascade connection

Examples

Experimental program
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Embodiment 1

[0042] Such as Figure 4 As shown, a charge pump based on voltage doubler cascade is formed by cascading N voltage doubler units, and the voltage doubler unit receives a pair of phase-complementary clock signals Φ1~Φ2 provided by external equipment; The voltage doubler units all use voltage doubler circuits, and the rest of the voltage doubler units use voltage doublers. The input end of the first stage voltage doubler unit receives the input voltage V provided by external equipment. IN , the output terminal of the last stage voltage doubler unit generates the output voltage V OUT ; Both N and K are natural numbers greater than 0, and 1≤K≤N;

[0043] In this embodiment, the rated input voltage range is 1.5V-2.1V, and the rated output voltage is 6.75V. The input voltage and output voltage satisfy the following relationship:

[0044] V IN = V OUT N ...

Embodiment 2

[0063] Such as Image 6 As shown, a charge pump based on cascaded voltage doubler, the rated input voltage range is 1.5V ~ 2.1V, and the specified required output voltage is 6.75V; therefore, it is composed of five voltage doubler units cascaded, and the voltage doubler The unit receives a pair of phase-complementary clock signals Φ1~Φ2 provided by external equipment; among them, the first three-stage voltage doubler units all use voltage doubler circuits, the last two-stage voltage doubler units all use voltage doublers, and the first-stage voltage doubler units use voltage doublers. The input terminal receives the input voltage V provided by the external device IN , the output terminal of the last stage voltage doubler unit generates the output voltage V OUT ; The first clock terminal and the second clock terminal of the voltage doubler circuit adopted by the first three stages of voltage doubler units respectively receive clock signals Φ1-Φ2.

[0064] Such as Figure 5 A...

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Abstract

The invention discloses a charge pump based on voltage multiplier cascade connection. The charge pump is formed by N voltage-multiplying units in cascade connection, and the voltage-multiplying units receive a pair of phase-compensated clock signals provided by external equipment. The first K-level voltage-multiplying units adopt voltage-multiplying circuits, other voltage-multiplying units adopt voltage multipliers, and each voltage multiplier consists of a voltage-multiplying circuit, a switching circuit and a level transmission circuit. The charge pump can overcome overhigh and overshoot voltage and output ripple voltage caused by wide input voltage range, applying the charge pump to a flash memory enables a flash memory unit to be more accurate in reading, writing, erasing operations, damages of overshoot and ripples to the flash memory unit can be alleviated, and the service life of the flash memory unit can be prolonged. Overshoot and ripples can be greatly reduced without increasing circuit areas, and the charge pump is simple in structure, can be realized only by adding some level transmission circuits and switching circuits, is beneficial to cost reduction and has high practical value.

Description

technical field [0001] The invention belongs to the technical field of DC-DC step-up, in particular to a charge pump based on voltage doubler cascading. Background technique [0002] Today, Flash Memory (flash memory) has become our very important storage device. Flash memory is non-volatile, has good impact resistance to hard drives, and can be integrated with traditional CMOS technology. These advantages make flash memory widely used in many fields. [0003] The reading, writing and erasing of the flash memory unit requires a certain bias voltage on each port, and with the reduction of power consumption, the power supply voltage is getting lower and lower, which makes the read and write operations of the memory unit in the flash memory impossible. Thus the charge pump came into being. A charge pump is a DC-DC step-up conversion circuit, which is widely used in various voltage source circuit systems that need to generate small current and high voltage from a low power sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14H02M3/07
Inventor 廖璐韩雁罗豪刘晓鹏寿鑫莉王明宇曹天霖
Owner ZHEJIANG UNIV
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