Active low pass filter

181

03:15:53

This circuit can be used as a subwoofer pre-amplifier, the isochronic transmittance can be founded just with the inverting transmittance equation (T=-Z2/Z1). Z1 is the 1K resistor and Z2 the parallel assembly of the 16nF cap and the 10K resistor. Then, your just have to reduce this formula to get something like "T=To/(1+j(w/wo))" with "To=the 0Hz transmittance value", " w=The input frequency (rad/s)","wo=the cutting frequency (rad/s)".

Then, if you want to found the gain(dB) you just have to calculate "G(dB)=20log(T)" With "T" the transmittance founded before!

This circuit "cuts" the signal at 1KHz

published 9 years ago

deadall127

9 years ago

Bon travail ;)

deadall127

9 years ago

Du coup g fait ma version: http://everycircuit.com/circuit/5063488143097856

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9 years ago

Je suis en train de bosser sur les filtres passe bandes du 4e ordre (aïe), j'essaierai de faire un circuit ^^

deadall127

9 years ago

Bah, quand tu sais faire le 1er ordre, tu sais faire l'énième ordre

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9 years ago

Euuuuuuuuh.. Regardes les équations de transmittance frère, ça fait mal un peu x)

deadall127

9 years ago

C'est sûr que les filtres passifs à la chaine ça doit pas être génial mais bon, au pire y a EC pour te donner la F de coupure XD

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9 years ago

Là on est d'accord xD

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