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Re: LF: Pout vs V for class D amp?

from [Andy Talbot] [Permanent Link][Original]
To: LineOne <[email protected]>
Subject: Re: LF: Pout vs V for class D amp?
From: Andy Talbot <[email protected]>
Date: Fri, 30 Mar 2018 00:33:00 +0100
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Take a look at http://www.g4jnt.com/137tx.pdf
All the equations you need are in there

and "single ended" in that context refers to class A / B   not E
Class E is a special (quasi resonant) type of switching transmitter

Andy




On 29 March 2018 at 23:18, N1BUG <[email protected]> wrote:
Some months back, Andy gave me this formula for calculating power
out of a single ended (class E) PA. It has been very helpful.

Pout max = Vdd ^2 / 2 / RL

Is there a similar formula to calculate power out of a class D
voltage mode PA (such as the W1VD design)?

I'm almost finished building my W1VD PA and I am wondering what
power output I can expect at different power supply voltages. I need
to make some sensible decisions about power supplies...

Thanks,
Paul N1BUG


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