Hi everybody,
I want to realize a bandpass for a center frequency of f0 = 50kHz with a Q factor of around 50 to 100, gain should be of order unity.
I tried with an active bandpass with multiple feedback and also with a biquad active filter (each with OP37). In principle, both designs work but Q factors are worse than expedted. (I assume someone more experienced in electronics would easily figure out the reasons..)
However, I found that National Semiconductor's AF150 seems to perfectly meet my demands. Does someone know if this circuit is still available or if there is any equal substitute? Where can I procure the device?
Any hint is appreciated... thanks in advance!
Steffen
I want to realize a bandpass for a center frequency of f0 = 50kHz with a Q factor of around 50 to 100, gain should be of order unity.
I tried with an active bandpass with multiple feedback and also with a biquad active filter (each with OP37). In principle, both designs work but Q factors are worse than expedted. (I assume someone more experienced in electronics would easily figure out the reasons..)
However, I found that National Semiconductor's AF150 seems to perfectly meet my demands. Does someone know if this circuit is still available or if there is any equal substitute? Where can I procure the device?
Any hint is appreciated... thanks in advance!
Steffen