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

Help me design a bandpass filter with shifting center freq.

Status
Not open for further replies.
R

Raintree

Newbie level 6
Joined
Feb 2, 2005
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
127
Bandpass filter

Hi guys,

I wanna to design a bandpass filter of bandwidth = 1kHz, i wants the center frequency to be able to shift about.

For example, i can tune it to fc of 2kHz (BW=2.5kHz-1.5kHz = 1kHz) and later i wanna to set the fc to 5kHz. How should i do if i am only using the RC circuit.
Which means that i wanna the center frequency be able to shift about from 1kHz to 7kHz.

Thanks,
Raintree
 

Bandpass filter

You can use variable resistors so you can tune the resistor value until you get the desired frequency.
 

Re: Bandpass filter

If the frequencies are low , instead of a passive filter, you can use a switched capacitor filter and modify the frequency of the clock to tune the center frequency
 

Bandpass filter

hi.
Req=paralel(R1,R2)
f1= 1/sqrt(c2Req)
f2=1/sqrt(c1Req)
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top