Distortion Analyser


Posted on Oct 9, 2012

Total harmonic distortion (THD) measurements are one of the most commonly quoted in audio. Contrary to belief in some circles, these can be very useful if performed properly, and reveal much about the overall performance of an amplifier. There are a number of ways to measure distortion, none of which is perfect. Probably the best is a spectrum analyser, which shows the individual harmonics and their amplitudes. These are too expensive for the likes of you and me (well, me, anyway) and the next best thing is featured here.


Distortion Analyser
Click here to download the full size of the above Circuit.

The standard tool for measuring THD is a notch filter. This is tuned to reject the fundamental frequency, and any signal that gets through is a combination of the amplifier`s noise (including any hum) and the distortion. The distortion shows up as a




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Fuzzbox Using LM741
    140W Amplifier Circuit ( 2x 70 Watt ) Schematic Diagram
    Invert a 555 Astable Output Signal
    how to build a 2KVA inverter circuit diagram
    how to test servo servo tester simple
    40 PIN AVR Development Board
    battery monitor circuit
    60 Watt Audio Power Amplifier
    Simple Infrared Control Extender
    Transistor time relay circuit
    Three reverse brake circuits to operate energy



    Top