To bring the fabric of the micro-gyroscope into simulation of total closed-loop system,the equivalent electrical analogue of drive part of the micro-gyroscope is built.The new low noise closed-loop driving circuit is based on the phase-locked technology using the transimpedance amplifier to realize I-V transformation which effectively avoids phase error caused by the charge amplifier.By using the CCCII+technology to realize the floating resistor,the noise of the total closed-loop driving circuit is reduced.In simulation,the natural frequency of the micro-gyroscope is 2.7 kHz.The displacement in the drive direction of the micro-gyroscope has 90°phase leg comparing to the driving force in the drive direction.The value of floating resistor is 250 kΩ where the bias current is 50 μA.The active resistor is 0.037 fV2/Hz.The micro-gyroscope is vibrated at its natural frequency.