Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

decimation filter problems

Status
Not open for further replies.
B

bittersweet

Newbie level 5
Joined
Mar 2, 2008
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,368
Hi,

I have 2 questions about decimation filter for a SD ADC. Firstly, how is the relationship between SNR and stopband attenuation for decimation filter. For example if I have 14 bits output of the decimation filter, SNR=(6.02*N+1.76)=86 db, so will I choose stopband attenuation >86 db for decimation filter?

Secondly, if my input is 100 khz sinus, when I'm designing decimation filter will I choose pass band frequency of 200khz=Nyquist freq. or 100 khz?

I'm very confused, if you help me, I'll be very appriciated, thanks.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top