File:Negative resistance oscillator block diagram.svg

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English: Block diagram of a negative resistance electronic oscillator, illustrating the "reference plane" analysis method. The circuit consists of a differential negative resistance device such as a Gunn diode or magnetron tube connected to a resonator such as a LC circuit, dielectric resonator, or cavity resonator. To determine the frequency and amplitude of oscillation, the circuit is thought of as divided by a plane (red) into two parts: the negative resistance device, and the resonator and load. The complex impedance "looking into" each part, ZN(jω) and ZL(jω), is calculated. The circuit will oscillate at the frequency ω and amplitude at which ZN = -ZL. Alternately the reflection coefficient Γ can be used. The circuit will oscillate when ΓNΓL = 1.
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Author Chetvorno

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20 December 2012

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