Sigma-delta ADC for capacitive accelerometer
The paper presents a method of replacing the switched capacitor circuit comprising integrators to changing capacitance sensor accelerometer. The requirements for configuring the SDM model to reduce the effect of stray capacitance sensor integrator without delay are given. Selected values of the coefficients a single-stage SDM DFB third order with a one-bit quantizer. Proposed filter decimator, which is 25 times better than the classical FIR filter for performance.