资源简介
仿真通过的锁相环的simulink模型,毕设用的靠谱推荐。
代码片段和文件信息
%% Demo: Phase Locked Loop
% This demo shows the executable specifications and design with simulation
% capabilities of Simulink. It highlights:
%
% 1. Creating conceptual models of signal processing systems and running
% simulations
%
% 2. Adding finite state machines to the design
%
% 3. Creating models of physical components (e.g. circuitery)
%
% 4. Using discrete-time signal to create mixed-signal models
%
% 5. Converting digital models to fixed-point
%
% 6. Optional: (not implemented yet) generating C and/or HDL
%% What is a Phase-Locked Loop?
% A phase-locked loop (PLL) is a closed-loop feedback control system that
% generates and outputs a signal in relation to the frequency and phase of
% an input (“reference“) signal. A phase-locked loop circuit responds to
% both the frequency and the phase of the input signals automatically
% raising or lowering the frequency of a controlled oscillator until it is
% matched to the reference in both frequency and phase.
%
% This type of mechanism is widely used in radio telecommunications
% computers and other electronic applications where it is desired to
% stabilize a generated signal or to detect signals in the presence of
% noise. Since an integrated circuit can hold a complete phase-locked loop
% building block the technique is widely used in modern electronic
% devices with signal frequencies from a fraction of a cycle per second up
% to many gigahertz. (Source: wikipedia.org.)
%% A linear Phase Locked Loop in Simulink
% The first step of the demo shows how to model and simulate a linear PLL
% that can track a 1 MHz reference signal.
%
% A classic or linear PLL uses a mixer as a phase detector. This yields a
% DC component that is proportional (but not linear) with the phase
% difference and a component at a frequency that is twice the input
% frequency. A loop filter is used to get rid of the second component. The
% output of the loop filter is fed into a VCO that increases the freqeuncy
% if there is a positive phase difference and that decreases the frequency
% if there is a negative phase difference.
%
% Start with the basic components of a PLL: a Multiply block (Math
% Library) an Analog Filter Design block (Filter Design library in the
% Signal Processing Blockset) and a Voltage Controlled Oscillator
% (Communications Blockset Components sublibrary in the Synchronization
% library).
%
% Double click on the blocks to show how to set the parameters for each
% block:
%
% The Analog Filter Design block;
% Design method: butterworth
% Filter type: Lowpass
% Filter order: 5
% Passband edge frequency: 1e6*2*pi.
%
% The VCO block;
% Quiescent frequency: 1e6
% Input sensitivity: 1e5
% Initial phase: 0.
open_system(‘linearpll‘); set_param(bdroot‘SimulationCommand‘ ‘update‘)
sim(bdroot);
%%
% In order to simulate the system we need a test input and vizualiation.
% To achieve this add a S
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2012-11-16 13:01 Phase Locked Loo\
目录 0 2012-11-16 13:15 Phase Locked Loo\Images\
文件 37898 2007-04-20 00:30 Phase Locked Loo\cppll.mdl
文件 45910 2007-05-04 21:44 Phase Locked Loo\dpll.mdl
文件 46721 2007-04-20 05:04 Phase Locked Loo\dpll_fixpt.mdl
目录 0 2012-11-16 11:43 Phase Locked Loo\html\
文件 43520 2012-11-16 11:38 Phase Locked Loo\html\Thumbs.db
文件 238484 2007-05-04 21:59 Phase Locked Loo\html\fixpttool.jpg
文件 14387 2007-04-20 00:17 Phase Locked Loo\html\pfd.jpg
文件 38042 2007-05-04 21:56 Phase Locked Loo\html\plldemo.html
文件 4347 2007-05-04 21:56 Phase Locked Loo\html\plldemo.png
文件 9728 2007-05-04 21:55 Phase Locked Loo\html\plldemo_01.png
文件 6033 2007-05-04 21:55 Phase Locked Loo\html\plldemo_02.png
文件 5134 2007-05-04 21:55 Phase Locked Loo\html\plldemo_03.png
文件 8169 2007-05-04 21:55 Phase Locked Loo\html\plldemo_04.png
文件 8519 2007-05-04 21:55 Phase Locked Loo\html\plldemo_05.png
文件 14397 2007-05-04 21:55 Phase Locked Loo\html\plldemo_06.png
文件 10221 2007-05-04 21:55 Phase Locked Loo\html\plldemo_07.png
文件 8674 2007-05-04 21:56 Phase Locked Loo\html\plldemo_08.png
文件 5169 2007-05-04 21:56 Phase Locked Loo\html\plldemo_09.png
文件 9645 2007-05-04 21:56 Phase Locked Loo\html\plldemo_10.png
文件 6896 2007-05-04 21:56 Phase Locked Loo\html\plldemo_11.png
文件 5358 2007-05-04 04:26 Phase Locked Loo\html\plldemo_eq79689.png
文件 1551 2009-06-19 14:47 Phase Locked Loo\license.txt
文件 29832 2012-11-16 13:01 Phase Locked Loo\linearpll.mdl
文件 16037 2007-05-04 21:50 Phase Locked Loo\plldemo.m
文件 47261 2007-04-27 01:08 Phase Locked Loo\powerpll.mdl
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