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English: Abstract block diagram of an electronic oscillator. It consists of an amplifying element with transfer function G(jω) with its output fed back into it's input through a feedback network with transfer function H(jω). The output voltage is labelled V o and the feedback voltage is labelled V f.
Oscillator block diagram.svg is the same image with A and β(jω) replaced with alternate variables G(jω) and H(jω). Oscillator diagram2.svg is the same image with the feedback loop shown broken, to show how loop gain is calculated.
English: Block diagram of an electronic oscillator circuit, with the feedback loop broken to show how to calculate the loop gain. It consists of an amplifier element with amplification A, with its output V o fed back into its input V i through a feedback network with transfer function β(jω).
The neon bulb has a very high resistance until the capacitor voltage reaches its breakdown voltage V br, at which it conducts and discharges the capacitor, and the cycle repeats. Italiano: Semplice circuito di un Oscillatore RC a Rilassamento, utilizzante una lampada al neon come dispositivo non lineare.
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.
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