File:Tunnel diode amplifier.svg
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Summary
| Description |
English: A demonstration circuit showing how a tunnel diode can amplify a signal using negative differential resistance. The DC voltage Vb biases the tunnel diode TD into its negative resistance region and also supplies the power used in amplifying the signal. For stability the resistor R must be less than the diodes negative resistance r. Therefore the total resistance of both devices in series, r - R is a small negative value. Therefore a small increase in the input voltage Vi causes a large decrease in the current, causing a large increase in the voltage across the diode . Using the equation for a voltage divider, the AC output voltage is
Since the denominator is smaller than the numerator, the circuit has positive gain |
| Date | |
| Source | Own work |
| Author | Chetvorno |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:30, 30 September 2012 | | 661 × 507 (18 KB) | wikimediacommons>Chetvorno | Redrew circuit to take output across diode instead of resistor to make analysis easier |
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