Active Bandpass Filter using op-amp

Status
Not open for further replies.
A

ali ghafoor

Member level 4
Joined
Feb 11, 2011
Messages
69
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Visit site
Activity points
1,779
is it possible to realize active bandpass filter using op-amp at Fc=350 MHz?? if yes, kindly suggest me the op-amp that i should use.
 

I require high selectivity filter. A bandwidth of 5MHz, passband insertion loss<= -10 dB, stopband attenuation at +-20MHz >=40dB. LC filter cannot provide these specifications. Another option is coaxial ceramic resonator filter. I am working on that topology but i need one prototype on urgent basis, if i can make one using op-amp or any kind of active topology. give me your suggestions..any active filter topology capable of meeting these requirements??
 

I require high selectivity filter. A bandwidth of 5MHz, passband insertion loss<= -10 dB, stopband attenuation at +-20MHz >=40dB. LC filter cannot provide these specifications.
Click to expand...
The specification involves a higher order filter, independent of the used technology.

In case of an active filter, filter Q is linked to required gain margin respectively excess GBW. I can't imagine that the filter can be easily implemented with available GHz OPs.
 

ali ghafoor said:
Another option is coaxial ceramic resonator
Click to expand...
Equivalent circuit is the same LC only comparatively Q is better around 500-600. But with helix L it possible as well.
 
Last edited:

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…