Decimator

K

knguyen4573

New Member

• Jul 8, 2004

• #1

How to design 16 to 1 Decimator filter design? I have 12 bit data, 64 Mhz input, and 12 bit data, 4 MHz input. Please, help me how to design it. Thanks

 

R

Russlk

New Member

• Jul 8, 2004

• #2

Decimator, n. 1 a person or thing that decimates.

Decimate, v. 1 to destroy much of; kill a large part of.

 

0mega

New Member

• Jul 8, 2004

• #3

Do you mean a clock divider? ie. for every 16 pulses in, one pulse comes out? You can do it with flip flops or a clock divider ic.

 

G

grrr_arrghh

New Member

• Jul 9, 2004

• #4

'16 to 1 decimator'

destroys 15 of them, so there is only one left... :lol:

 

Roff

Well-Known Member

• Jul 9, 2004

• #5

The bandwidth of your 4MHz data will be less than 2MHz (Shannon-Nyquist). Run the 64MHz data through a 2MHz lowpass filter (clocked at 64MHz), then decimate it by saving every sixteenth sample, giving you 4MHz data on this channel with no aliasing. Decimation is simple when the new data rate is binarily related to the old one. It gets complicated if you want to convert 64MHz data to, say, 7MHz data.

Is this a homework problem?

 

0mega

New Member

• Jul 9, 2004

• #6

Pfft. the word decimate means "remove on in every ten." Originally, anyway.

 

Roff

Well-Known Member

• Jul 9, 2004

• #7

0mega said:

Pfft. the word decimate means "remove on in every ten." Originally, anyway.

Click to expand...

Yeah, well, gay used to mean happy and carefree.

 

0mega

New Member

• Jul 10, 2004

• #8

touche.

 

J

Johnson777717

New Member

• Jul 11, 2004

• #9

LOL, you folks crack me up. Thank you!