Tagged Questions

1
vote
0answers
62 views

Precision Tracking filter required

I don't mind if it's a band-pass or low pass filter (although I think low-pass will give a better result). Input operating frequency range is 100Hz to 1kHz. Input amplitude will be about 1Vp-p and ...
8
votes
5answers
1k views

Analyzing Accelerometer data characteristics and designing a filter

I have about 32 seconds worth of accelerometer data of a basic driving scenario 25MPH normal roads along with hitting about 7 potholes and a rough patch of road. The accelerometer is mounted on the ...
4
votes
3answers
574 views

What are the the advantages of a switched capacitor filter over a digital filter?

The main advantage that switched capacitor filters seem to have over digital filters is the potential to achieve a high dynamic range, since the signal does not have to be quantized. As discrete time ...
5
votes
3answers
288 views

Is it possible to calculate effective value of a signal from its average value?

I have a signal which I want to calculate its effective value. The signal is a voltage value read on a 33.3m\$ \Omega \$ resistor connected series to a 220V AC power line. My aim is to calculate the ...
2
votes
3answers
460 views

How to configure an analog filter(s) to maximally smooth out a 100 Hz PWM signal from a LED controller

I have an RGB LED controller which controls the brightness using a 100 Hz PWM, seemingly without any built-in smoothing at all. (recorded it with a soundcard, and those pulses are 100 percent ...
5
votes
5answers
1k views

Circuit to remove noise from digital communication line

Carrying on further from my previous post and drilling down to specifics, I am trying to figure out the right way to implement "glitch remover", or "noise remover", using electronics (i.e. not in ...
-1
votes
2answers
272 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
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 ...
4
votes
2answers
383 views

LM13700 Question

I'm currently troubleshooting a state-variable filter I built. All of the filter types work, but the resonance pot has no effect. Tracing a sine signal through the feedback pathway, I found that it ...