Tagged Questions

5
votes
1answer
262 views

Q factor for an LRC series circuit

Trying to prove to myself that the Q factor for an LRC series circuit is \$\sqrt{L/C}/R\$, but I am struggling with it... My reasoning runs that the half power upper frequency limit is (ignoring the ...
1
vote
2answers
260 views

How does this circuit attenuate high frequencies?

I understand that this circuit could be used as a treble control circuit with high frequency gain occuring when R3 is set so a=b (we'll call this k=0), and high frequency attenuation occuring when R3 ...
5
votes
5answers
430 views

Bandpass filter to isolate musical note “A2”

I would like to design a bandpass filter to isolate the musical note A2 ( 110Hz ) from its neighboring notes at a precision of a half-step. This means that ...
-1
votes
2answers
271 views

How can I multiply (double) my input frequency without distorting my waveform?

I'm looking to double my input frequency in my circuit, but it's important that the signal stays the same shape as much as possible. I'm working with low sine wave frequency's. Edit: Sorry it took so ...
1
vote
1answer
351 views

Schematic for 4-band stereo equalizer?

I wand to make a simple stereo 4-band EQ for a mid-fi amp I'm building. I draw my knowledge from this excellent article - however, it only seems to talk about peak/notch bands and not low and high ...
1
vote
4answers
114 views

Frequency Filtration

I have a signal that consists of N frequencies all with unknown phase and frequency(N) = frequency(N-1) + 2Hz. I would like to selectively scale the amplitudes of some of those signals in such a way ...