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Topic: Need help with Simulink "Memory" block.
Replies: 1   Last Post: Nov 18, 1996 1:28 PM

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Tom Cipollone

Posts: 13
Registered: 12/7/04
Need help with Simulink "Memory" block.
Posted: Nov 16, 1996 12:59 PM
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I am trying to use Simulink to simulate a PLL. I have dowmloaded an M
file from the ftp site
"ftp.mathworks.com/pub/contrib/simulink/vco/pll.m" which in fact is a
model of a PLL.

In this M file there is a VCO block, which I have also loaded. Inside
the block, there is another block called "memory". I am trying to figure
out the function of the "memory" block. The only explanation that I can
find in the help files states : Applies a one integration step delay.
The output is the previous input value. Use it to break algebraic

I know what an integrator is and how it is used in the continuous
domain. I know what a unit delay is and how it is used in the discrete
domain. But I do not know how an integration step delay is used in the
continuous domain. How do you know how long an integration step delay is

Please point me to any application notes concerning this topic that I
may have missed.

Also, under what circumstances would I want to use the "clock" block. I
noticed that it was also used in the pll.m simulink file mentioned

Thank you


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