Quadrature signal of microgyroscope and its effect on signal detection

The behavior of quatradure signal in the motion equation is presented,and its effects on the signal detection is studied with Simulink.First,a signal corresponding to the angular velocity caused by the quatradure signal is presented.Then,spectrum analysis is conducted with angular velocity being 0 ° /sand 80 ° /s.Finally,the quatradure signal's effects on the analog and digital detection circuits are simulated and analyzed.The result shows that,for analog demodulation,the quatradure signal can lead to zero-rate output(ZRO) and ZRO drift.And as for digital demodulation,since the quatradure signal significantly decrease the scale factor,the quatradure signal can deteriorate the ZRO's stability and restrict the advantage of digital demodulation even when the quantization noise and other circuit noise are within a certain extent.