www.gusucode.com > signal 案例源码程序 matlab代码 > signal/FalltimeReferenceLevelInstantsAndReferenceLevelsExample.m
%% Falltime, Reference-Level Instants, and Reference Levels % Determine the fall time, reference-level instants, and reference levels % in a 2.3 V clock waveform sampled at 4 MHz. % Copyright 2015 The MathWorks, Inc. %% % Load the 2.3 V clock waveform along with the sampling instants. load('negtransitionex.mat','x','t') %% % Determine the fall time, reference-level instants, and reference levels. [f,lt,ut,ll,ul] = falltime(x,t); %% % Plot the waveform with the upper and lower reference levels and reference % level instants. Show that the fall time is the difference between the % lower- and upper-reference level instants. plot(t,x) xlabel('seconds') ylabel('Volts') hold on plot([lt ut],[ll ul],'ro') hold off fprintf('Rise time is %g seconds.',lt-ut)