In order to reduce energy consumption and occupied space, this openly provides 90 degrees move looks ware circuit and MEMS gyroscope. It carries out looks ware (10) imagination of moving that has 90 degrees phase shifts of the same input frequency's (fz) sinusoidal incoming signal (Vip, vin) of locating at input frequency (fz) has: run -on time all pass filter level (12), it receives sinusoidal incoming signal and generate output signal (Vop, ), von, output signal (Vop, von, ) phase shift has been located 90 in the RC time constant's as all pass filter level (12) the phase shift frequency (f90) of function, and calibration level (16), it is coupled to all pass filter level (12) and generate the calibrating signal (Sc) that is used for all pass filter level (12) for phase shift frequency (f90) equals sinusoidal incoming signal's input frequency (fz), and no matter the change of input frequency (fz) and/or RC time constant's value for the nominal value. The embodiment is paid limitedly and energy consumption is limited in the aspect of the circuit resource.
Move looks ware circuit and MEMS gyroscope