电测与仪表2016，Vol.53Issue(15)：47-52,6.
多路复用器建立时间及其在伺服控制电路中应用
Settling time of multiplexer and its application in servo control circuit
赵爱明 1刘卓夫 2郭环球1
作者信息
- 1. 上海电机学院电气学院，上海200240
- 2. 哈尔滨理工大学测控技术与仪器黑龙江省重点实验室，哈尔滨150080
- 折叠
摘要
Abstract
In order to meet the demands of high speed and high precision in the multi-channel pneumatic system, the problems of on-off speed in data acquisition and its characteristics were investigated, and the circuit was designed. Firstly, parameters and structures of the state-of-the-art multiplexer model and the analog switch were introduced eval-uated by calculating and analyzing the relationship among on resistance, equivalent capacitance and setup time of the single polarity multiplexer.The analysis results provide the basis for determining the on-off speed.Secondly, the transmission effect of sample-and-hold circuit and the principle of optimization were examined by analyzing the settling time of a multiplexer.Finally, the design standards of analog switch were proposed based on the aforementioned re-sults.According to the application requirements, ADG508 multiplexer was chosen to develop a multi-channel, high-speed and high-precision data acquisition circuit of a pneumatic servo controller, including filter circuit, multiplexer and CPLD-based ADC driven circuit.Laboratory and field tests were conducted and the results indicate that the maxi-mum sampling speed is up to 20 ksps under the condition of 0.05%precision.关键词
伺服控制/模拟开关/多路模拟复用器/建立时间/采样率Key words
servo control/analog switch/multiplexer/settling time/sampling rate分类
信息技术与安全科学引用本文复制引用
赵爱明,刘卓夫,郭环球..多路复用器建立时间及其在伺服控制电路中应用[J].电测与仪表,2016,53(15):47-52,6.
