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Third order Intermodulation products
Distortions in a system are represented with the help of Taylor series. Each term
in Taylor series is represented as below.
F1 and f2 are the frequencies of two different inputs signals to the system.
Variable n can have any integer value
Value n=3 is of most interest because it results in signals that are very close to
the desired signals
M is a variable which takes the values 0, 1, 2 and 3
m = 0, Third order distortion product =
m = 1, Third order distortion product =
m = 2, Third order distortion product =
m = 3, Third order distortion product =
Third Order Intermodulation Intercept (IP3) point discussion on next page
Signal to Noise Ratio (SNR).
Noise Factor (F).
Noise Figure (NF).
Minimum Detectable Signal (MDS).
Intermodulation (IM) distortion.
Second order intermodulation products.
Third order intermodulation products.
IP3 (Third Order Intercept) point.
Dynamic Range (DR)