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  1. BetaTripp

    Adding filtered signals from the same source

    Haha, I didn't cut and paste anything. What I did was try to seperate the 3 frequecy bands, so they didn't interact, as I realised that if they were in series one filter could cut out some frequencies that a following filter might be designed for. I then calculated the components using...
  2. BetaTripp

    Adding filtered signals from the same source

    yeah ive looked at some. they just based around the same idea. filters in parallel..? thats the ones not based around an op-amp. The capacitors go to ground because they are low pass filters and the value of the capacitors dictate how much of the signal will go to ground...? the resistors are to...
  3. BetaTripp

    Adding filtered signals from the same source

    Hi, I've decided to try and design a simple tone control circuit for a guitar amp, i'v gone with 3 filters in parallel (high pass, low pass and band pass for high mid and low ranges) but im not sure how to add the signals afterwards to put them into a pre-amp... ill attach the schematic. i am...
  4. BetaTripp

    Lots of transistors. What do they all do! (schematic)

    Hi, I'v got a bit of a background in electronics but haven't ever really designed anything myself (in a circuitry sense). The schematic I have attatched is one of a guitar amplifier, could somebody tell me what all of these transistors do?? I see that theres a differential amp on the left and...
  5. BetaTripp

    Differential amplifiers - why amplify the difference?

    So how is the signal amplified and not the noise? Is it something to do with the phase of the signal? Say if the phase was 180 degrees out, I thought all of it would cancel out and if the phases were the same they would add together. Maybe it is nothing to do with phase..
  6. BetaTripp

    Differential amplifiers - why amplify the difference?

    Hi all, A bit of a rookie question maybe but what is a differential amplifier used for and what is the point in amplifying the difference between the two inputs? If you are feeding back the output of the amp to the negative input wouldnt you just end up with the input minus the output which...
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