max power transfer theorem

#21

March 5th 04, 09:07 AM

Richard Harrison

Posts: n/a

Steve Nosko wrote:
"How come voltage dB and power dB are different?"

They aren`t.

10log(power ratio) = 20log(voltage ratio)

They are equal because power is proportional to voltage squared. To
square with a logarithm, you multiply by (2).

Best regards, Richard Harrison, KB5WZI

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