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Chirp generator in VHDL

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greprac

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chirp generator

Hi frendz
I have to write VHDL code for a chirp generator which outputs a chirp sweeping from 39 Khz to 41 Khz in 20 cycles... any idea how shall I do it. my system clock is 100 MHz
Plz help me
 

chirp vhdl

I would use a DDS. Here is a description of the general technique, however it doesn't give VHDL details:
"Generate Digital Chirp Signals With DDS" by Bar-Giora Goldberg
**broken link removed**
 

r u using this for test purpose?
is 2Khz in 20 samples sufficient??
try sptool in matlab it has a chirp signal u need to configure it to ur requirements or u have inbuilt matlab functions. u need to make this in fixed point format get them, put into memory(ROM) and read them.if its for a test purpose put them in an array in ur toplevel hdl testbench and use it.
 

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