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| View Original: | Negative resistance amplification.svg (946x844) | |||
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| Keywords: Negative resistance amplification.svg negative differential resistance device showing how it can amplify an AC signal applied to it The diagram shows a negative diff resistance device biased into its negative resistance region with a DC bias voltage V<sub>bias</sub> and an AC voltage Δv applied to it showing the current and voltage waveforms across it <br/> In the negative resistance region an increase in voltage will cause a decrease in current so Δi and Δv have opposite signs Therefore the AC current and voltage waveforms across the device are 180° out of phase indicated by the colored half-cycles So the AC power dissipation in the device the product of the AC voltage and current P<sub>AC</sub> ΔiΔv is negative it produces power that is consumed by the external circuit Therefore with the proper external circuit it can increase the power of an applied signal amplifying it <br /> The AC power generated comes from the power carried by the DC bias current P<sub>DC</sub> I<sub>bias</sub>V<sub>bias</sub> 2012-07-18 own Chetvorno cc-zero Uploaded with UploadWizard Negative resistance Device current-voltage characteristics | ||||
