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本文的背景是基于MEMS技术的加速度传感芯片的伺服电路,是法国原子能署--电子与信息技术实验室项目的组成部分。文中提出了一种新型数字锁相环的模型并对其进行了硬件实现。该数字锁相环的功能是:紧跟角速度传感装置输出信号的相位,输出与其严格同相位的正弦以及其正交信号。利用这对信号既可以反馈回来激励传感装置,也可对输出相位进行调制和解调。仿真以及硬件验证的结果表明,此数字锁相环的性能良好,能够快速地跟上输入相位,输出信号信噪比高,对硬件的计算能力要求低。
The background of this article is the MEMS-based accelerometer chip servo circuit that is part of the French Atomic Energy Agency’s Electronic and Information Technology Laboratory project. In this paper, a new type of digital phase-locked loop model and its hardware implementation. The function of this digital phase-locked loop is to follow the phase of the output signal of the angular velocity sensing device and to output a sinusoidal signal of exactly the same phase as its quadrature signal. This pair of signals can be used both to feedback the sensor device and to modulate and demodulate the output phase. Simulation and hardware verification results show that the performance of this digital phase-locked loop, can quickly keep up with the input phase, the output signal high signal-to-noise ratio, the hardware computing power requirements.