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- W2377531073 abstract "An improved closed-loop detecting circuit based on switched-capacitor was presented to enhance resolution of MEMS capacitive accelerometer and reduce system noise.A novel charge integrator was adopted to achieve capacitor-voltage conversion,which is insensitive to parasitic capacitance,has a low noise level,and reduces the effects of finite gain,finite bandwidth and offset of operational amplifier.Moreover,correlated double sampling(CDS)was introduced to reduce 1/f noise and offset in circuit.Meanwhile,in order to simulate the sensing structure accurately,equivalent electrical model of sensing structure was improved using two voltage control current sources controlled by two inverse clock signals,which eliminates the error brought by effect of nonidealities,such as offset of operational amplifier and noise.We fabricated a two-chip integrated accelerometer containing interface ASIC and sensing element structure.The circuit was implemented in a 0.5 μm CMOS process.Testing results indicate that the sensitivity of the accelerometer with the improved circuit is 620 mV/g,the nonlinearity is 0.126%,noise floor is 24 μg·Hz-12 and the power consumption is 30 mW." @default.
- W2377531073 created "2016-06-24" @default.
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- W2377531073 date "2010-01-01" @default.
- W2377531073 modified "2023-09-26" @default.
- W2377531073 title "Low Noise Interface ASIC of Capacitive MEMS Accelerometer" @default.
- W2377531073 hasPublicationYear "2010" @default.
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