Thread: N900 Radio Transmitter: ways to amplify the radio signal
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fnordianslip is offline fnordianslip
2010-01-01 , 15:15
Posts: 670 | Thanked: 359 times | Joined on May 2007
#68
Well, power in Watts = voltage squared divided by the impedance (or resistance), so it isn't linear.

Voltage expressions in dB use the "20 log rule" whereas power expressions in dB use the "10 log rule", hence the figure of +6dB for a doubled voltage level, and +3dB for a doubled power level.

Edit. Actually, you said voltage and current both increase linearly, and they actually do, as according to Ohms law R=V/I, so V and I rise linearly, but the power goes up exponentially, as P=VI.
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Last edited by fnordianslip; 2010-01-01 at 15:24.
 

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