This page defines the term "1dB Compression" and illustrates the definition with a working example.

Consider the primary transfer characteristic of an amplifier...

Assume:

• Linear Gain is 20 dB
• 1 dB compression point, is where Pg = 19 dB
• 119 W output at 1.5 W input = 19dB = 10Log(119/1.5)

Then:

1dB compression point is 119 Watts