I want to implement a narrow bandpass filter with centre freq=440MHZ,n unity gain BW. BW = 430-450 MHZ...so people i need ur help..plz guide n help me ..
For the R-C equations to be close, the op amp has to have a gbw at least 20x-50x times the frequency*Q.
So op amp filters are generally used in the DC-10 MHz range. For a 440 MHz narrow BPF, passive LC
filters are usually the first choice. You can usesomething like the ADA4899 as input and output buffers,
but note that the part is typically 600 MHz (could be more or less) with a 25 mV signal. For larger
signals, you get into slew rate limiiting.
Can you tell us what Analog Devices part you are using so I can direct you to the proper community on EngineerZone to get assistance?
EngineerZone Community Manager
sir thanks for your reply...
I intend to use opamps and rc circuit,,,the probem is dat m not sure whtr
the rc circuit will work for high frequency or not..and i havent been able
to choose a particular op-amp...currently i m working wid ADA4899,,but i am
not getting the desired response...
so i willl b obliged if can help me out on this...
On Mon, Mar 26, 2012 at 6:12 PM, AndyR <firstname.lastname@example.org
and sir may i have your email id so that i can directly mail you the files containing circuits that m using...?
I moved your question to the Operational Amplifiers community. Someone in this community should be able to assist you.
plz suggest the op-amp that is operates in the range 430Mhz to 450Mhz
On Mon, Mar 26, 2012 at 8:09 PM, harryh <
i meant centre frequency of the filter should be 440MHZ
sir can you give idea how to implement narrow band pass filter with ceter
freq=440 Mhz and unity gain BW, irrespective of components used....
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