File:Negative resistance oscillator load lines.svg
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Summary
| Description |
English: Graph of the current-voltage curve of a negative resistance oscillator| showing load lines. It consists of a negative differential resistance such as a Gunn diode connected across a resonant circuit. A voltage source Vbias biases the diode into its negative resistance region, where it has resistance Δv/Δv = -r. The negative resistance cancels the positive resistance R in the circuit, exciting oscillations i(t). DCL is the DC load line, which establishes the Q point. SSL is the small signal load line, which is the operating condition when the oscillator first starts up and oscillations have a small amplitude. As the oscillations grow the nonlinearity of the diode eventually limits the amplitude. The sine wave extends into nonlinear regions near the edges of the negative resistance region, where the negative resistance is smaller, so the "average" negative resistance decreases until it is equal to the load resistance R, shown by LSL, the large signal load line. The nonlinearity distorts the output sine wave at large amplitudes. |
| 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 | 16:48, 28 February 2013 | | 948 × 569 (25 KB) | Chetvorno | Improved shape of output sine wave, added label "Q" |
| 06:47, 4 February 2013 |  | 948 × 569 (24 KB) | Chetvorno | Made characteristic curve of negative resistance less symmetrical, more similar to an actual device such as a tunnel diode or Gunn diode | |
| 02:23, 21 December 2012 |  | 971 × 630 (25 KB) | Chetvorno | User created page with UploadWizard |
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