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how to understand constant envelope?

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northguy

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Most mobile products are designed with Class C power amplifiers, which offer the highest power efficincey. However, because they are nonlinear, requires the amplified signal to have a constant envelope.


why nonlinear PA amplifier a constant envelope?
 

northguy said:
Most mobile products are designed with Class C power amplifiers, which offer the highest power efficincey. However, because they are nonlinear, requires the amplified signal to have a constant envelope.


why nonlinear PA amplifier a constant envelope?
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Because nonlinear PA amplify different amplitudes differently-not linearly.
So you will get distorted signal at output.
Regards,
eirp
 

Class AB is also used for a constant envelope.
 

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