For nonlinear system " Input →
→ Output ",
1). HD (Harmonic Distortion)
Input = A•cos(ω)t
then
Output = a0 + a1•cos(ω)t + a2•cos(2ω)t + a3•cos(3ω)t + a4•cos(4ω)t + …
define:
HD3 = a3/a1
HD2 = a2/a1
2). IM (InterModulation distortion)
Input = A•cos(ω1)t + A•cos(ω2)t
then
Output = b0 + b1•cos(ω1,2)t + b2•cos(ω1±ω2)t + b3•cos(2ω1±ω2)t + …
define:
IM3 = b3/b1
IM2 = b2/b1
Thus,
|
