共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
提出了一种用相变器件作为可擦写存储单元的具有掉电数据保持功能的触发器电路.该触发器由四部分组成:具有恢复掉电时数据的双置位端触发器DFF、上电掉电监测置位电路(Power On/Off Reset)、相变存储单元的读写电路(Read Write)和Reset/Set信号产生电路,使之在掉电时能够保存数据,并在上电时完成数据恢复.基于0.13μm SMIC标准CMOS工艺,采用Candence软件对触发器进行仿真,掉电速度达到0.15μs/V的情况下,上电时可以在30ns内恢复掉电时的数据状态. 相似文献
3.
你希望能够重做一次?这里介绍的数据保存程序可以将系统及时恢复到原来的状态。 相似文献
4.
直流稳压电源输出幅度稳定度的测量问题,必须实时采集数据绘制波形图,并以不同保存方式保存真实的反映测试过程的测量数据,本文介绍了在LabVIEW 8.5开发环境下,通过GPIB接口控制Agilent34401A实现实时幅度测量数据采集,并将采集数据实时描绘成波形图及多种数据保存方式的程序设计方法.该程序与波形记录仪功能相仿,可以反映被测物理量的变化趋势,它不仅扩展了仪器功能,还具有采集时间间隔任意设置、波形打印、数据存盘等功能. 相似文献
5.
阐述了CMOS的数据结构,对CMOS中数据的备份、恢复、清除作了详细的说明,针对CMOS中密码的清除,提供了几种简便的方法。 相似文献
6.
7.
实现了USB数据采集卡和上层虚拟仪器之间连接,并把来自CMOS图像传感器上的视频数据,通过采集卡直接传进终端机进行处理.本文设计采用Cypress公司的USB接口芯片结合CPLD的控制芯片,结合USB驱动程序和固件程序与VC的动态链接库,实现了LabVIEW对自制采集卡的访问. 相似文献
8.
微机的CMOS参数及硬盘的主引导记录,对于整个微机系统信息的保存非常重要,每次开机时,BIOS中的自检程序首先要依据CMOS中设置的参数完成硬件设置的初始化,然后系统由硬盘的主引导记录中的引导指令引导微机启动,最后通过主引导记录中硬盘分区表的数 相似文献
9.
10.
11.
12.
13.
Iida M. Kuroda N. Otsuka H. Hirose M. Yamasaki Y. Ohta K. Shimakawa K. Nakabayashi T. Yamauchi H. Sano T. Gyohten T. Maruta M. Yamazaki A. Morishita F. Dosaka K. Takeuchi M. Arimoto K. 《Solid-State Circuits, IEEE Journal of》2005,40(11):2296-2304
A 16 Mb embedded DRAM macro in a fully CMOS logic compatible 90 nm process with a low noise core architecture and a high-accuracy post-fabrication tuning scheme has been developed. Based on the proposed techniques, 61% improvement of the sensing accuracy is realized. Even with the smallest 5 fF/cell capacitance, a 322 MHz random-cycle access while 32 ms data retention time which contributes to save the data retention power down to 60 /spl mu/W are achieved. 相似文献
14.
用于JPEG2000静止图像压缩编码FPGA实现的图像验证系统。整个系统平台是由一个并VICMOS电脑眼、两个FPGA芯片、UART接口以及外部缓存组成。为了对搭建的平台进行验证,将并口电脑眼采集的图像数据存储在外部SRAM中,然后通过UART接口传送到PC机中,并通过PC机端的串口接收程序把采集的图像显示出来。完成了图像采集模块和UART接口模块的verilog HDL模型描述,通过了仿真和逻辑综合,并下载到FPGA芯片中,编写了串口接收程序,成功地实现了系统的联机调试。 相似文献
15.
Kehrer D. Wohlmuth H.-D. Knapp H. Wurzer M. Scholtz A.L. 《Solid-State Circuits, IEEE Journal of》2003,38(11):1830-1837
We present an integrated 2:1 multiplexer and a companion 1:2 demultiplexer in CMOS. Both integrated circuits (ICs) operate up to a bit rate of 40 Gb/s. The 2:1 multiplexer features two in-phase data inputs which are achieved by a master-slave flip-flop and a master-slave-master flip-flop. Current-mode logic is used because of the higher speed compared to static CMOS and the robustness against common-mode disturbances. The multiplexer uses no output buffer and directly drives the 50-/spl Omega/ environment. An inductance connected in series to the output in combination with shunt peaking is used to enhance the bandwidth of the multiplexer. Fully symmetric on-chip inductors are used for peaking. The inductors are mutually coupled to save chip area. Lumped equivalent models of both peaking inductors allow optimization of the circuit. The ICs are fabricated in a 120-nm standard CMOS technology and use 1.5-V supply voltage. Measured eye diagrams of both ICs demonstrate their performance. 相似文献
16.
A 32-KB Standard CMOS Antifuse One-Time Programmable ROM Embedded in a 16-bit Microcontroller 总被引:3,自引:0,他引:3
《Solid-State Circuits, IEEE Journal of》2006,41(9):2115-2124
A 32-KB standard CMOS antifuse one-time programmable (OTP) ROM embedded in a 16-bit microcontroller as its program memory is designed and implemented in 0.18-$muhbox m$ standard CMOS technology. The proposed 32-KB OTP ROM cell array consists of 4.2$muhbox m^2$ three-transistor (3T) OTP cells where each cell utilizes a thin gate-oxide antifuse, a high-voltage blocking transistor, and an access transistor, which are all compatible with standard CMOS process. In order for high density implementation, the size of the 3T cell has been reduced by 80% in comparison to previous work. The fabricated total chip size, including 32-KB OTP ROM, which can be programmed via external$hboxI^2hboxC$ master device such as universal$hboxI^2hboxC$ serial EEPROM programmer, 16-bit microcontroller with 16-KB program SRAM and 8-KB data SRAM, peripheral circuits to interface other system building blocks, and bonding pads, is 9.9$hbox mm^2$ . This paper describes the cell, design, and implementation of high-density CMOS OTP ROM, and shows its promising possibilities in embedded applications. 相似文献
17.
This paper presents a novel variable-latency multiplier architecture, suitable for implementation as a self-timed multiplier core or as a fully synchronous multicycle multiplier core. The architecture combines a second-order Booth algorithm with a split carry save array pipelined organization, incorporating multiple row skipping and completion-predicting carry-select dual adder. The paper reports the architecture and logic design, CMOS circuit design and performance evaluation. In 0.35 μm CMOS, the expected sustainable cycle time for a 32-bit synchronous implementation is 2.25 ns. Instruction level simulations estimate 54% single-cycle and 46% two-cycle operations in SPEC95 execution. Using the same CMOS process, the 32-bit asynchronous implementation is expected to reach an average 1.76 ns throughput and 3.48 ns latency in SPEC95 execution 相似文献
18.
提出了一种应用于无线内窥镜系统的2.4GHz低功耗ASK发射机.为了获得高的数据传输速率,采用了基于混频器的直接上变换发射机结构.为了节省功耗,提出了一种基于电流复用技术的伪差分堆栈结构的A类功放.低功耗发射机由两部分组成:基于恒幅度锁相环(PLL)的20MHz的ASK基带调制器和直接上变换的射频电路.该设计已经采用TSMC 0.25μm CMOS工艺实现并进行了验证.测试结果表明,发射数据速率为1Mbps时,发射机的输出功率为-23.217dBm.采用单2.5V的电源供电下,低功耗发射机消耗的电流约为3.17mA. 相似文献
19.
介绍一种新的图像采集系统。该系统以凌阳公司最近推出的嵌入式32位多媒体微处理器SPCE3200为主控制器,OmniVision公司生产的型号为OV7620的CMOS图像传感器为图像采集芯片。OV7620将图像信息采集后以RGB原始数据格式传给SPCE3200,该处理器将数据转化为YUV格式后经内置MPEG 4/JPEG硬件编解码模块压缩编码,然后存储在FLASH中,实现图像信息的采集和保存。主要对相关的软硬件技术做了介绍,并给出电路图与程序流程。采用凌阳公司最近推出的嵌入式32位多媒体微处理器SPCE3200为主控制器,该芯片内置CMOS传感器接口单元,可直接与CMOS传感器相连接,使得硬件电路格外简单。 相似文献
20.
介绍了一个关系模型数据库应用程序的开发以及该数据库在环境试验中的应用。使用该数据库可完成试验数据的输入、查询、保存和打印等操作,加强了数据处理的一致性、准确性,提高了工作效率。 相似文献