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一种高效率的适合于低功耗应用的电荷泵电路 总被引:1,自引:1,他引:0
设计实现了一种高效率的电荷泵电路。利用电容和晶体管对电荷传输开关进行偏置来消除开关管阈值电压的影响。同时,通过对开关管的的衬底进行动态的偏置使得在电荷传输期间当开关管打开时其阈值电压较低,在开关管关断时其阈值电压较高。该电荷泵电路的效率得到了提高。基于0.18μm,3.3V标准CMOS工艺实现了该电路。在每级电容为0.5pF,时钟频率为780KHz,电源电压为2V的情况下,测得的8级电荷泵的输出电压为9.8V。电荷泵电路和时钟驱动电路从电源处总共消耗了2.9μA的电流。该电荷泵电路适合于低功耗的应用。 相似文献
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高性能电荷泵电路设计与HSPICE仿真 总被引:2,自引:1,他引:1
电荷泵锁相环具有高速、低功耗、低抖动等特点.电荷泵是锁相环中的关键模块,它实质上是一个开关电流源,需具有精准稳定的恒流源和理想的开关.在模块运行中,一般会出现电荷共享及充放电电流不匹配等现象.通过自举的方法,可以较好地消除电荷共享现象;采用电流跟随电路,可以使充放电电流得到较好匹配.基于2.5 V 0.25 μm CMOS工艺,设计了一个高性能电荷泵.采用Synopsys公司的Hspice仿真软件,对设计的电路进行模拟仿真.结果显示,在1.45 V至2.0 V之间,充放电电流几乎相等. 相似文献
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针对交叉耦合型电荷泵电荷回流的问题,本文提出了一种新型六相位电荷泵结构,电荷泵的主体由3个NMOS管和3个泵电容组成。考虑到时钟驱动能力对电荷泵性能的影响,设计通过增加额外的时钟驱动模块实现四相位到六相位的时钟转换,从而减小电荷泵的上升时间并改善输出电压。此外,电路采用并联双支路结构减小输出电容的充放电时间间隔,以减小输出纹波。基于0.13μm工艺的仿真结果表明,在时钟频率为20MHz,负载电容为50pF,负载电流为300μA的条件下,该电路可以实现3.3V到15V的电压转换,效率可达到67.7%,输出纹波仅为38.5mV。 相似文献
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Dynamics of the Dickson charge pump circuit are analyzed. The analytical results enable the estimation of the rise time of the output voltage and that of the power consumption during boosting. By using this analysis, the optimum number of stages to minimize the rise time has been estimated as 1.4 Nmin, where Nmin is the minimum value of the number of stages necessary for a given parameter set of supply voltage, threshold voltage of transfer diodes, and boosted voltage. Moreover, the self-load capacitance of the charge pump, which should be charged up at the same time as the output load capacitance of the charge pump, has been estimated as about one-third of the total charge pump capacitance. As a result, the equivalent circuit of the charge pump has been modified. The analytical results are in good agreement with simulation by the iteration method, typically within 10% for the rise time and within 2% for the power consumption. In the case of a charge pump with MOS transfer transistors, the analytical results of the rise time agree with the SPICE simulation within 10% 相似文献
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设计了一种基于传统Dickson结构的PMOS管传输型电荷泵电路。电路通过衬底电位跟随器实现PMOS管传输,避免了传输过程中阈值电压损失;通过电阻分压反馈网络、控制振荡器输出达到稳压的目的;在电荷泵不工作时,各个子电路关断,实现低功耗设计。仿真结果表明,电路效率高,上电时间短,纹波小;采用SMIC 0.18μm工艺流片,电路达到设计要求,输出高压稳定,驱动能力强,在1M EEPROM电路芯片中得到实际应用。 相似文献
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The analysis and design of a semi-passive radio frequency identification(RFID) tag is presented.By studying the power transmission link of the backscatter RFID system and exploiting a power conversion efficiency model for a multi-stage AC-DC charge pump,the calculation method for semi-passive tag's read range is proposed.According to different read range limitation factors,an intuitive way to define the specifications of tag's power budget and backscatter modulation index is given.A test chip is implemen... 相似文献
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To overcome the limitation of low image signal swing range and long reset time in four Iransistor CMOS active pixel image sensor, a charge pump circuit is presented to improve the pixel reset performance. The charge pump circuit consists of two stage switch capacitor serial voltage doubler. Cross-coupled MOSFET switch structure with well close and open performance is used in the second stage of the charge pump. The pixel reset transistor with gate voltage driven by output of the pump works in linear region, which can accelerate reset process and complete reset is achieved. The simulation results show that output of the charge pump is enhanced from 1.2 to 4.2 V with voltage ripple lower than 6 inV. The pixel reset time is reduced to 1.14 ns in dark. Image smear due to non-completely reset is elIminated and the image signal swing range is enlarged. The charge pump is successfully embedded in a CMOS image sensor chip with 0.3 × 10^6 pixels. 相似文献
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Salahddine Krit Hassan Qjidaa Imad El Affar Yafrah Khadija Ziani Messghati Yassir El-Ghzizal 《半导体学报》2010,31(4)
This paper presents a novel organization of switch capacitor charge pump circuits based on voltage doubler structures. Each voltage doubler takes a DC input and outputs a doubled DC voltage. By cascading voltage doublers the output voltage increases up to 2 times. A two-phase voltage doubler and a multiphase voltage doubler structures are discussed and design considerations are presented. A simulator working in the Q-V realm was used for simplified circuit level simulation. In order to evaluate the power delivered by a charge pump, a resistive load is attached to the output of the charge pump and an equivalent capacitance is evaluated. To avoid the short circuit during switching, a clock pair generator is used to achieve multi-phase non-overlapping clock pairs.
This paper also identifies optimum loading conditions for different configurations of the charge pumps. The proposed charge-pump circuit is designed and simulated by SPICE with TSMC 0.35-μm CMOS technology and operates with a 2.7 to 3.6 V supply voltage. It has an area of 0.4 mm2; it was designed with a frequency regulation of 1 MHz and internal current mode to reduce power consumption. 相似文献
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A new high performance charge pump circuit is designed and realized in 0.18μm CMOS process. A wide input ranged rail-to-rail operational amplifier and self-biasing cascode current mirror are used to enable the charge pump current to be well matched in a wide output voltage range.Furthermore,a method of adding a precharging current source is proposed to increase the initial charge current,which will speed up the settling time of CPPLLs.Test results show that the current mismatching can be less than 0.4%in the output voltage range of 0.4 to 1.7 V,with a charge pump current of 100μA and a precharging current of 70μA.The average power consumption of the charge pump in the locked condition is around 0.9 mW under a 1.8 V supply voltage. 相似文献
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Low-voltage charge pump 总被引:1,自引:0,他引:1
A low-voltage charge pump, having a symmetrical structure, is proposed. In this charge pump, enhanced switches are used instead of diode-configured MOSTs. The switch-controlling voltage is mutually offered by the two symmetrical branches, which makes the enhanced switches turn on/off alternatively during the designated cycles. Consequently, the voltage drop due to the threshold voltage of MOSTs is eliminated, exhibiting gain in die area, rise time and maximum output voltage. 相似文献
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提出一种改进型高性能单端电荷泵电路 ,该电路基于电流舵结构 ,使用运放将偏置电路与充放电电路分开。该电路具有低的输出抖动、宽的电源范围 ,使用级连电流镜像消除过冲注入电流。基于 CMOS0 .3 5工艺 ,用 SPECTRE对该电路进行仿真 ,改进后的电路可消除 1.2 m A的注入电流 ,稳定工作在 2 5 /12 .5 MHz下 ,其最低工作电压为 2 .2 V,静态功耗为 0 .44m A,达到设计目标。 相似文献
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For 3D vertical NAND flash memory, the charge pump output load is much larger than that of the planar NAND, resulting in the performance degradation of the conventional Dickson charge pump. Therefore, a novel all PMOS charge pump with high voltage boosting efficiency, large driving capability and high power efficiency for 3D V-NAND has been proposed. In this circuit, the Pelliconi structure is used to enhance the driving capability, two auxiliary substrate bias PMOS transistors are added to mitigate the body effect, and the degradation of the output voltage and boost efficiency caused by the threshold voltage drop is eliminated by dynamic gate control structure. Simulated results show that the proposed charge pump circuit can achieve the maximum boost efficiency of 86% and power efficiency of 50%. The output voltage of the proposed 9 stages charge pump can exceed 2 V under 2 MHz clock frequency in 2X nm 3D V-NAND technology. Our results provide guidance for the peripheral circuit design of high density 3D V-NAND integration. 相似文献