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Rfboy
Joined: 28 Apr 2001
Posts: 45
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 12 Dec 2004 12:09 Fir filter !!!!!! |
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Hy guys,
I need your help about this problem :
1) I use a FIR compiler of @ltera
2) I want to implemet a serial-in / parallel-out fir filter ( raised cosine type )
3) I want to put a 10 bit dac directly connected to the bus of fir filter
Now my questions are :
1) Is the output bus of filter in two complements format ?
2) If yes, how can it's possible to cennect this bus in to a dac having unsigned digital bus input ???
3)Is it possible to implement a unsigned filter ????
Thak you
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telga
Joined: 01 Nov 2004
Posts: 25
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| 12 Dec 2004 16:26 Re: Fir filter !!!!!! |
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Hello,
Can you describe more your system (with a small draft for example) ?
Can you give the serial input frequency ?
What is the working frequency for your FPGA ?
Telga
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echo47
Joined: 07 Apr 2002
Posts: 4206
Helped: 565
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| 12 Dec 2004 22:08 Fir filter !!!!!! |
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1. Probably yes.
2. Simply invert the most significant bit. Then your unsigned DAC will be happy.
3. I suppose so, but do #2 instead.
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andy1
Joined: 24 Jul 2004
Posts: 124
Helped: 2
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| 13 Dec 2004 3:23 Re: Fir filter !!!!!! |
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| Is this an FPGa implementation?
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