For the throughput of traditional dielectrophoresis cell capture biochip is not high,or cannot address the microelectrode array,this paper introduces an electrical control system designed for high throughput and addressable cell capture biochip application,which includes a PC control software and a microcontroller unit(MCU) circuit.The MCU consists of a STM32 MCU,a signal generating unit,and the switch control unit.The measurement results show that this control system can address the specific microelectrode of a cell capture biochip which has a 32×32 microelectrodes array,and load an in-phase or out-phase sine wave on the addressed microelectrode.

在0.18 μm 2P4M CMOS工艺上实现了一种符合ISO/IEC 14443 TYPE A(2008)协议的多码率非接触式智能卡专用集成电路解码器.解码器通过两个同步计数器的状态组合恢复单位编码时钟,引进中间变量输出不归零码.采用上升沿触发计数器,优化凹槽容差性能,避免因凹槽信号导致的电源毛刺对数据的影响.测试结果表明,该解码器支持106 kb/s,212 kb/s,424 kb/s和848kb/s四种码率的改进Miller编码数据解码,对应不同码率均有高凹槽容差性能,满足非接触式智能卡性能要求.

Based on 0. 18 μm CMOS technology,a high speed ASK( amplitude shift keying)demodulator for contactless smart card compatible with International Standard ISO / IEC 14443 TYPE B was proposed. The circuit works in voltage mode,the RF signal envelope and the reference voltage are extracted through the low-pass filter with the same DC( direct current) channel,then the needed signal after hysteresis comparator and output stage is restored. The demodulator architecture is simple,less sensitive to process variation,and capable for high speed and little modulation index data demodulation.The simulation results show that the demodulator can operate at an input signal voltage from 4 to 8 V,detect NRZ( non-return-to-zero) coding using ASK modulation at bit rates of 106,212,424 and 848 kbit / s. The range of ASK signal modulation depth can be achieved from 1% to 20%.

The time consumption of the current RFID binary tree anti-collision algorithm increases linearly with the number of tags in the reader electric-magnetic field.Since reducing the time cost in the anti-collision inventory query of large amount(100) of RFID tag is particularly important to promote the RFID technology in real applications.This paper presented a new segmental search method to cut down the overall time through reducing the responding data bytes from tags to the reader in the RFID anti-collision inventory process.Simulation result of MATLAB shows that the new algorithm can reduce time consumption of inventory process significantly when the tag number is larger than specific number with fixed segmental method.

本文在简要回顾冷链管理的基础上,指出我国目前血液管理产品交付和运输是血液冷链管理的薄弱环节.通过比较射频识别(RFID)技术的优缺点,针对血液产品冷链管理需求的特点,提出了混合无源RFID标签和有源温度标签的血液产品的冷链管理前端数据采集系统方案,结合ISBT有关指南,对相关系统的指标和演示系统作了详细的介绍.最后文章就血液产品冷链RFID管理作了进一步的展望.