signal-generator loop

The basic principle of DSP digital control BOOST-PFC is presented. The small-signal power model of voltage loop and current loop is setup. The optimal parameters of control system are calculated in theory.

文中阐述了DSP数字控制BOOST-PFC的基本原理，建立了电压环、电流环的小信号功率模型，从理论上计算控制系统的最佳参数。

The phase-locked loop band-pass filter and the logarithmic amplifier is adopted in the circuit to insure the reliability of receiving signal.

电路中采用锁相带通滤波器和对数放大器，保证有效信号的可靠接收。

Adopting the reactive circuit of twice harmonic to process the sensor signal, the system is closed loop.

对传感器信号处理采用的二次谐波反馈电路，电路为闭环系统。

4 × 2.5Gbit/s optical time division multiplexing signal generation system has been developed in our experiment Fiber coupler loop-connecting configuration can realize the same optical signal multiplexing.

实验中我们实现了4×2.5Gbit/s的光信号复用。

Control circuit is taking pulse wide modulation circuit as core. By comparison of given signal and feedback signal of overvoltage, get the width-adjustable pulse signal for regulating output of welding power source so as to realize the colsed-loop control to arc-welding inverter.

控制电路以脉宽调制电路为核心，通过电压给定信号和反馈信号的比较，获得宽度可调的脉冲信号，调节焊接电源的输出，并实现对弧焊逆变器的闭环控制。

The phase jitter of output signal of the PLL ( phase locked loop ) frequency doubler is analyzed.

定量分析了数字式锁相 倍频器 输出信号的相位抖动.

Research on Timing Synchronization Algorithm to Burst QPSK Signal Open Loop Structure

开环结构突发QPSK信号定时同步算法研究

Single Loop Differential Method for Measuring Signal for Resistance Strain Gauge

电阻应变片信号的单回路差动测量

And the receiver include differential phase discrimination, signal detecting, frequency estimates and timing tracking loop.

接收机部分包括差分鉴相、匹配滤波、信号检测、定时同步、频偏估计和定时跟踪等。

Obtained in-phase signal throw costas loop was normalized to obtain a cosine signal.

这种算法的思想就是把经过科斯塔斯环得到的同相信号进行归一化处理，得到一个近似的余弦信号。