一种抑制低频噪声的微机械陀螺C/V转换电路  

A Low-frequency Noise Suppression C/V Converter Circuit for Microgyroscopes

作　　者：南素娟[1] 李晓莹[1] 常洪龙[1] 

机构地区：[1]西北工业大学陕西省微/纳米系统重点实验室,西安710072

出　　处：《机电一体化》2010年第8期69-72,共4页Mechatronics

基　　金：航空基金(20070853012);国家863计划(2009AA04Z32)

摘　　要：目前一般均采用电荷放大器作为微机械陀螺前置接口电路,实现电容变化信号C/V转换提取。文章设计了一种能够抑制低频噪声的微机械陀螺前置C/V转换电路,分析了低噪声前置C/V转换电路的工作原理,用Saber软件对传统电荷放大器和低噪声前置C/V转换电路从时域及频域方面进行了仿真对比,最后通过实验验证仿真结果的可靠性。仿真及实验结果表明,设计的前置C/V转换电路能更好地抑制低频噪声。Charge amplifiers circuit is usually used as pre-interface circuit of microgyroscopes. In this paper, a new C/V converter circuit was designed, which can well restrain the low-frequency noise. The Working Principle was analyzed, furthermore, the performance are compared from frequency domain and time domain with Saber simulation. Experimental test and simulation results have showed that the designed C/V converter circuit can restrain low-frequency noise effectively.

关 键 词：微机械陀螺 低频噪声 前置C/V转换电路 电荷放大器 

分 类 号：TN911.23[电子电信—通信与信息系统]