I am in the process of testing out a wien bridge notch filter that i designed. The circuit simulation promised me a gain of -100dB at my chosen frequency. Which means that is almost zero output considering that I am to use about 2V at my input.
The problem is that I have never before, until now, seen a practical active filter circuit. For an input of 2V, I have an output of a noisy 20mV signal, which is absolutely OK for my purposes. I am just wondering, having taken all noise aspects into consideration,common grounding etc, how low an output can one get from a practical filter.
The problem is that I have never before, until now, seen a practical active filter circuit. For an input of 2V, I have an output of a noisy 20mV signal, which is absolutely OK for my purposes. I am just wondering, having taken all noise aspects into consideration,common grounding etc, how low an output can one get from a practical filter.