压电陶瓷驱动电路RC网络补偿技术研究  

Research on compensation technology of piezoelectric ceramic driving circuit RC network

作　　者：鲁琳琳[1] 贾豫东[1] 张晓青[1] 

机构地区：[1]北京信息科技大学光电测试技术北京市重点实验室,北京100192

出　　处：《电子技术应用》2015年第10期52-54,共3页Application of Electronic Technique

基　　金：北京市教育委员会科技计划面上项目(KM201411232005);青年拔尖人才培育计划(CIT&TCD201404122)

摘　　要：压电陶瓷(PZT)驱动电路由于负载为容性,会使环路增益上产生附加极点,从而影响电路的稳定性,严重时会导致芯片和陶瓷损坏。构建了驱动电路的数学模型,在此基础上,对基于运放PA88的驱动电路进行了仿真分析,对提高驱动电路稳定性的方法进行研究。研究结果表明,采用外接RC网络补偿可有效提高电路稳定性,解决了PZT驱动电路不能长期稳定工作的问题,并给出了PZT驱动电路元器件的最优参数。Because the load of piezoelectric ceramic （PZT） driving circuit is capacitive, it can generate an additional pole on the loop gain, thereby affecting the stability of the circuit and causing damage to the chip and ceramic when it is serious. This paper establishes the mathematical model of the driving circuit, on this basis, the driving circuit based on PA88 is analyzed and the method for improving the stability of driving circuit is studied. The results of the research show, using the external RC network compensation can effectively improve the circuit stability and solve the problem that the PZT driving circuit can＇t work long-term stability, in addition, the optimal parameters of the driving circuit components are given.

关 键 词：压电陶瓷 运算放大器 建模仿真 相位补偿 稳定性 

分 类 号：TN432[电子电信—微电子学与固体电子学]