Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

[SOLVED] Switched capacitor filter

Status
Not open for further replies.
V

Vangrip

Guest
Hi,

I have a simple question: I want to make an audio filter using switched capacitor filters (LMF100 - national). There is one problem however: I know I need to use a Bessel filter, but in the specs of these filtes, they don't say how you can create a bessel or butterworth filter. I guess it has something to do with the Q factor. Does anybody have any information on this or a few links with info?

thanks a lot!
Peter
 

Polli

Newbie level 6
Joined
May 13, 2001
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Hong Kong
Activity points
8
You can take a look at rane.com. They are a producer of good PA equipment and crossovers. There are a lot of papers on there website about active filters for audio.
 

S

sick_man

Guest
:roll:

THE TYPE AND DIMENTION OF FILTERS NEEDED CAN BE FOUND IN THE DATASHEET FOR THE CHIP

BETTER MY PAL TO USE MULTISIM FOR THIS TYPE OF THING :eek:
IT IS ITS BEST QUALITY AS AN AMPLIFIER DESIGNER AND LOGIC DRIVER BOTH AUDIO SPECTRUM AND ABOVE
VERY EASY TO GET THE BEST FACTORING AND SPREAD
AS MULTISIM PROVIDES YOU WITH NICE GRAPHS AND CHARTS OF RESPONCE AND YOU CAN FIT THE CHIP IN AND WATCH IT WORKING IN REALTIME OR SO :smile:
WITH AUDIO GOING IN YOUR SOUNDCARD LINE IN AND THROUGH THE FILTER AND OUT THE SPEAKER OUTS
:smile:

COME ON MULTISIM !!!!!! :wink:
 

V

Vangrip

Guest
Hmm, is multisim capable of accurately simulating switched capacitor filters? I'm still working with ewb5.12 because I like the interface a lot more.
 

bastos4321

Full Member level 5
Joined
Dec 31, 1999
Messages
264
Helped
27
Reputation
54
Reaction score
6
Trophy points
1,298
Location
space
Activity points
2,240
One of the best tools to simulate any switched capacitor circuit is the old switcap, and you can find it in filemanager.

About the filter, you can use matlab to have the transfer function and then design the filter.
Take a look in the Roubik and Temes book, Analog integrated circuits for signal processing, wily 1986.
 

andy2000a

Advanced Member level 2
Joined
Jul 18, 2001
Messages
597
Helped
14
Reputation
28
Reaction score
8
Trophy points
1,298
Activity points
5,298
a design tool called filter solution 9.1 support SCF..
but I don't know it can work on real SCF design ??

another filter design tool called filter wizard ..
someone use these tool on real analog IC design ??
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top