The SPLL consists of calculation frequency error, updating loop middle variable, and output control signal.
该锁相环由计算频率误差、更新环路中间变量、输出控制信号组成。
Modulation domain analysis has become an important part for modern measurement technology. It is better than time domain and frequency domain measurement when indicating frequency variable signal.
调制域分析已经成为现代测试技术不可或缺的部分，在显现频率变化信号时优于时域测量和频域测量。
By adjustment to control signal, systems might realize variable voltage, variable frequency, steady voltage, steady frequency closed loop control.
通过对控制信号的调整，系统可实现变压、变频、稳压、稳频的闭环控制。
Utilizing variable frequency transducer to get the displacement signal directly, the multimeter can show the tension or compression deformation after the micro-processing of signal.
本仪表采用电感调频式传感器直接输出表征位移的数字信号，经单片机处理后，即可显示拉压变形量。
The signal power supply that this thesis proposed is a frequency variable power source used in test field. This thesis concentrates on analysis and designing the nuclear part: Inverter.
本文的信号电源就是变频电源在测试领域的应用，本文就信号电源的核心逆变器部分做了详细的分析和设计。
The SA4828 used as SPWM signal generator controls the IPM via driver circuits to produce variable frequency power supply.
它以SA 4828作为SPWM信号发生器，经过驱动电路控制IPM模块，产生三相变频电源。
The plan is made up of 83c251sb one-chip computer and SA4828 integration-chip of SPWM wave signal, which is a simple-structure, low-costing and well-functioned variable frequency controller.
本设计方案采用83c 251sb型号单片机和SPWM波信号发生器s A 4828组成一种结构简单、成本低、功能较好的变频控制器。
The plan is made up of 83c251sb one-chip computer and SA4828 integration-chip of SPWM wave signal, which is a simple-structure, low-costing and well-functioned variable frequency controller.
本设计方案采用83c 251sb型号单片机和SPWM波信号发生器s A 4828组成一种结构简单、成本低、功能较好的变频控制器。
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