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Charge pump

A charge pump and circuit technology, applied in the field of charge pumps, can solve the problems affecting the voltage rise of the single-stage charge pump and the reduction of the clock signal swing, and achieve the effects of increasing the clock amplitude, increasing the rising speed, and high output voltage.

Active Publication Date: 2014-01-01
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction of the power supply voltage amplitude will reduce the swing amplitude of the clock signal accordingly, and finally affect the amplitude of the single-stage charge pump voltage increase (or decrease)

Method used

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Embodiment Construction

[0026] The charge pump proposed by the present invention is described in detail below with reference to the drawings and embodiments.

[0027] The core idea of ​​the present invention is to use the high voltage provided by the initial Dickson charge pump to increase the amplitude of the clock signal, and then use the clock signal with the increased voltage amplitude to increase the voltage increase rate in the subsequent charge pump circuit, thereby increasing the overall circuit voltage Increase the rate and increase the maximum voltage that the charge pump can output. The overall circuit consists of two parts: First, Dickson charge pump circuit; Second, clock boost charge pump. The second part of the circuit includes a voltage conversion circuit and a mixed clock signal charge pump. The charge pumps are all positive high voltage charge pumps. The first part of the Dickson charge pump uses the system power supply voltage VDD and the system two-phase clock signal to obtain a hi...

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Abstract

The invention discloses a charge pump, which relates to the technical field of integrated circuits. The charge pump comprises a first charge pump circuit, a clock signal voltage conversion circuit and a second charge pump circuit, wherein the first charge pump circuit takes a power voltage and a two-phase clock signal as input, and is used for boosting the power voltage to a first preset voltage value and outputting the power voltage; the clock signal voltage conversion circuit takes the output voltage of the first charge pump circuit and the two-phase clock signal as input, and is used for increasing the amplitude of oscillation of the two-phase clock signal to the output voltage and outputting the increased two-phase clock signal; and the second charge pump circuit takes the output voltage of the first charge pump circuit, the two-phase clock signal and the increased two-phase clock signal as input, and is used for boosting the output voltage to a second preset voltage value and outputting the output voltage. The charge pump provided by the invention adopts a two-level structure, and the clock amplitude of the post charge pump circuit is increased, thereby increasing the overall output voltage boosting speed of the charge pump and providing higher output voltage.

Description

Technical field [0001] The present invention relates to the technical field of integrated circuits, in particular to a charge pump. Background technique [0002] As the basic module of Flash memory, charge pump circuit largely determines the programming / erasing speed of Flash. With the advancement of integrated circuit manufacturing technology and the pursuit of low power consumption, the power supply voltage of integrated circuits continues to drop. At the same time, in the Flash memory, the program / erase operation of the cell still requires a higher voltage, which makes the charge pump circuit gradually show its important position in the continuous development of integrated circuits. In the design of Flash memory, the research on charge pump has gradually become one of the current hot spots. [0003] Charge pump, also known as switched capacitor voltage converter, is a DC-DC (DC-DC converter) that uses so-called "flying" or "pumping" capacitors instead of inductors or transform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 丁健平王源杜刚康晋锋张兴
Owner PEKING UNIV