- #1
Aman2301
- 8
- 0
Hi friends,
I have just started to work on active filters and designed the following:
1. 1st Order HighPass BW (cut off @ 1kHz)
2. 1st Order LowPass BW (cut off @ 2Khz)
3. Band pass using above two (1kHz to 2kHz)
4. 2nd Order HighPass BW (cut off @ 1kHz)
5. 3rd Order HighPass BW (cut off @ 1kHz)
6. 4th Order HighPass BW (cut off @ 1kHz)
all of the above are working fine but
7. Band-reject filter using 1. and 2. does not work
8. 2nd and higher order LowPass BW (cut off @ 2Khz) are not working.
I am getting some square wave type of pattern with spikes.
I am using PSpice to stimulate the circuit. It gives the expected result but
only for ckts 7. and 8. i am unable get the results practically i.e. on PCB/breadboard.
Any help will be highly appreciated.
Thanks.
(I have attached ckt dig. Please have a look.)
I have just started to work on active filters and designed the following:
1. 1st Order HighPass BW (cut off @ 1kHz)
2. 1st Order LowPass BW (cut off @ 2Khz)
3. Band pass using above two (1kHz to 2kHz)
4. 2nd Order HighPass BW (cut off @ 1kHz)
5. 3rd Order HighPass BW (cut off @ 1kHz)
6. 4th Order HighPass BW (cut off @ 1kHz)
all of the above are working fine but
7. Band-reject filter using 1. and 2. does not work
8. 2nd and higher order LowPass BW (cut off @ 2Khz) are not working.
I am getting some square wave type of pattern with spikes.
I am using PSpice to stimulate the circuit. It gives the expected result but
only for ckts 7. and 8. i am unable get the results practically i.e. on PCB/breadboard.
Any help will be highly appreciated.
Thanks.
(I have attached ckt dig. Please have a look.)