单层多晶的EEPROM

针对传统双层多晶EEPROM的诸多不足之处 ,介绍了相对较有潜力的单层多晶的EEP ROM ,主要对比了传统的双层多晶的EEPROM和单层多晶的EEPROM (singlepolyEEPROM ) ,展示了singlepolyEEPROM的应用前景 ,同时提出了singlepolyEEPROM所面临的问题 ,并有针对性地给出了几种解决方案  

一种高效率的适合于低功耗应用的电荷泵电路

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。  

CMOS Microsystem Front-End for MicroTesla Resolution Magnetic Field Measurement

In this paper we discuss the conception and performances of a monolithic microsystem for magnetic field measurement built in standard 0.6 m CMOS technology. It is shown that 5.2 microTesla resolution over 1 kHz bandwidth (5 Hz to 1 kHz) can be achieved by combining a particular Hall effect based sensing device and appropriate analog conditioning electronics. The study focuses on the methods used to drive up the sensor's sensitivity and to drive down the system's noise level in order to achieve the above-mentioned resolution. A specific circuitry is proposed for biasing the sensor.  

与常规CMOS工艺兼容的高压PMOS器件设计与应用

采用常规P阱CMOS工艺,实现了与CMOS工艺兼容的高压PMOS器件。制作的器件,其击穿电压为55 V,阈值电压0.92 V,驱动电流25 mA。对所设计的CMOS兼容高压PMOS器件的制造工艺、器件结构和测试等方面进行了阐述。该器件已成功应用于VFD平板显示系列电路。  

室温红外探测器研究与进展

简要概述了室温红外探测器技术的最新研究现状，首先根据工作机理的不同对红外探测器进行了分类，详细阐述了室温红外探测器的优点所在；接着在给出了室温红外探测器典型结构的基础上，对这些典型结构进行了比较和讨论；给出了最近出现的几种新型探测器，介绍了其工作原理、制作工艺和主要性能指标；最后对室温红外探测器的发展方向进行了预测。  

一种基于标准CMOS工艺的新型单片集成紫外图像传感器

我们提出了一种基于标准CMOS工艺的浮栅紫外图像传感器。传感器单元是由一个非常紧凑的紫外线灵敏器件构成。整个紫外图像传感器有一CMOS像素单元阵列、高压开关、读出电路和数字控制等部分组成。在一0.18μm标准工艺上实现了1个1616的图像传感器芯片。我们对传感器单元和阵列进行了测试，测试结果表明传感器的灵敏度为0.072 V/(mJ/cm2)，并且可以获得紫外图像。此紫外图像传感器适合于大规模集成的生物医药和太空探测等领域。  

适用于无源射频标签的低功耗单栅非挥发性存储器

针对低成本、低功耗无源射频电子标签,采用SMIC 0.18μm标准CMOS工艺设计实现了单栅、576bit的非挥发性存储器.存储器单元基于双向Fowler-Nordheim隧穿效应原理并采用普通的pMOS晶体管实现;编程/擦写时间为10ms/16bit.芯片实现块编程和擦写功能,通过提出一种新型的敏感放大器而实现了读功耗的优化.在电源电压为1.2V,数据率为640kHz时,读操作平均消耗电流约为0.8μA.  

适用于无源射频标签的低功耗单栅非挥发性存储器

针对低成本、低功耗无源射频电子标签,采用SMIC 0.18μm标准CMOS工艺设计实现了单栅、576bit的非挥发性存储器.存储器单元基于双向Fowler-Nordheim隧穿效应原理并采用普通的pMOS晶体管实现;编程/擦写时间为10ms/16bit.芯片实现块编程和擦写功能,通过提出一种新型的敏感放大器而实现了读功耗的优化.在电源电压为1.2V,数据率为640kHz时,读操作平均消耗电流约为0.8μA.  

A novel monolithic ultraviolet image sensor based on a standard CMOS process

We present a monolithic ultraviolet(UV) image sensor based on a standard CMOS process.A compact UV sensitive device structure is designed as a pixel for the image sensor.This UV image sensor consists of a CMOS pixel array,high-voltage switches,a readout circuit and a digital control circuit.A 16×16 image sensor prototype chip is implemented in a 0.18μm standard CMOS logic process.The pixel and image sensor were measured. Experimental results demonstrate that the image sensor has a high sensitivity of 0.072 V/(mJ/cm~2) and can capture a UV image.It is suitable for large-scale monolithic bio-medical and space applications.  

A high efficiency charge pump circuit for low power applications

A high efficiency charge pump circuit is designed and realized. The charge transfer switch is biased by the additional capacitor and transistor to eliminate the influence of the threshold voltage. Moreover, the bulk of the switch transistor is dynamically biased so that the threshold voltage gets lower when it is turned on during charge transfer and gets higher when it is turned off. As a result, the efficiency of the charge pump circuit can be improved. A test chip has been implemented in a 0.18 μm 3.3 V standard CMOS process. The measured output voltage of the eight-pumping-stage charge pump is 9.8 V with each pumping capacitor of 0.5 pF at an output current of 0.18 μA, when the clock frequency is 780 kHz and the supply voltage is 2 V. The charge pump and the clock driver consume a total current of 2.9 μA from the power supply. This circuit is suitable for low power applications.