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A Cross-Coupled Charge Pump with Variable Gain

A cross-coupling, charge pump technology, applied in conversion equipment, electrical components, climate sustainability, etc. without intermediate conversion to AC, can solve the problems of non-adjustable gain and low charging efficiency of charge pump, to improve efficiency, avoid Reverse conduction loss, the effect of increasing efficiency

Active Publication Date: 2021-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of non-adjustable gain and low charging efficiency of the charge pump in the traditional boost circuit, the present invention proposes a cross-coupled charge pump with variable gain, which not only improves the charging efficiency of the charge pump but also enables adjustable gain

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  • A Cross-Coupled Charge Pump with Variable Gain
  • A Cross-Coupled Charge Pump with Variable Gain
  • A Cross-Coupled Charge Pump with Variable Gain

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Embodiment Construction

[0065] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0066] The present invention proposes a cross-coupled charge pump with variable gain, which includes a gain selection module and four boost modules. In each boost module, a group of NMOS body diodes with a cross-coupling structure are used to pre-charge the capacitance. Charge, and then lift the voltage on the capacitor through the control of non-overlapping clock signals, so as to achieve different multiples of the output voltage.

[0067] Such as figure 1 (a) shows the first boost module, including the first NMOS transistor NM1, the second NMOS transistor NM2, the third NMOS transistor NM3, the fourth NMOS transistor NM4, the fifth NMOS transistor NM5, the sixth NMOS transistor NM6, the A capacitor C11, a second capacitor C12, a first transmission gate and a second transmission gate, the source of the first NMOS transistor NM1 is connected ...

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Abstract

A cross-coupled charge pump with variable gain, comprising a first boost module, a second boost module, a third boost module, a fourth boost module and a gain selection module; the first boost module can realize double The increase of the input voltage, the second boost module can achieve three times or four times the input voltage increase on the basis of the first boost module, and the third boost module is based on the first boost module and the second boost module The input voltage can be increased by six times or eight times, and the fourth boost module can realize four times, five times, seven times and Nine times the input voltage boost, through the superposition of the boost module and the selection function of the gain selection module, the charge pump proposed by the present invention can achieve flexible adjustment of the gain; in addition, the clock generation module uses non-overlapping clock signals to control The switching tube of the charge pump avoids the reverse conduction loss and improves the efficiency of the charge pump.

Description

technical field [0001] The invention belongs to the technical field of power management circuits, and in particular relates to a gain-adjustable cross-coupling charge pump. Background technique [0002] In the field of power management circuits, boost circuits are often used in power chips to generate a voltage higher than the power supply voltage, which is a commonly used voltage control technology. Since the switching power supply chip tends to have high efficiency and low power consumption, the requirements for the boost circuit in the switching power supply chip are getting higher and higher. [0003] There are generally two technologies for boost circuits, Boost converter and charge pump technology. Boost has high efficiency, but requires an inductor, occupies a large area, and is not easy to integrate; while the charge pump adopts a capacitive method, which has an advantage over Boost in terms of volume. But its efficiency reaches its maximum only when the output volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/07H02M1/0041H02M1/0048Y02B70/10
Inventor 周泽坤王佳文李响石跃王卓张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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