适用于微机械陀螺接口电路的新型开关解调方法  

Novel Switched Demodulation Method for Micro-Gyroscope Interfacing Circuit

作　　者：刘晓为[1] 任轶超[1] 谭晓昀[1] 

机构地区：[1]哈尔滨工业大学MEMS中心,哈尔滨150001

出　　处：《传感技术学报》2007年第8期1805-1808,共4页Chinese Journal of Sensors and Actuators

摘　　要：本文提出了一种可以运用于微机械陀螺接口电路中的新型开关相敏解调方法,它的电路实现比较容易,同时能够良好地抑制前级的直流电位偏差,可以最大限度地减小由于微机械陀螺接口电路的梳齿电容的不匹配而造成的直流失调电压,从而使所得到信号具有更小的谐波失真,提高陀螺的检测灵敏度.A novel switched demodulation method which can be applied on Micro-gyroscope interfacing circuit has been presented. The circuit is easy to realize and can well restrain the DC offset arises from forward stages. Its most important advantage is to decrease the distortion of output signal due to the discrepancy of detection capacitance, as a result, the output signal has a lower THD and the Micro-gyroscope can obtain a better sensitivity.

关 键 词：微机械陀螺 开关相敏解调 谐波失真 检测灵敏度 

分 类 号：TN492[电子电信—微电子学与固体电子学]