I14R10
Full Member level 3
Let's take Colpitts oscillator for example. How does the oscillations start?
Imagine that we have simple LC circuit. We charge the capacitor with a battery and then disconnect the battery. When we disconnect the battery the oscillations will start. In colpitts oscillator, the tank circuit is always connected to +V. That's the thing that confuses me. In LC circuit, the oscillations will only start if you remove power supply that you used to charge the capacitor.
This is the LC circuit that I am talking about https://www.falstad.com/circuit/e-lrc.html.
Can somebody explain what happens right then when we turn on Colpitts oscillator? Also, why is the tank circuit capacitor in Colpitts oscillator "split" into a 2 separate capacitors?
Imagine that we have simple LC circuit. We charge the capacitor with a battery and then disconnect the battery. When we disconnect the battery the oscillations will start. In colpitts oscillator, the tank circuit is always connected to +V. That's the thing that confuses me. In LC circuit, the oscillations will only start if you remove power supply that you used to charge the capacitor.
This is the LC circuit that I am talking about https://www.falstad.com/circuit/e-lrc.html.
Can somebody explain what happens right then when we turn on Colpitts oscillator? Also, why is the tank circuit capacitor in Colpitts oscillator "split" into a 2 separate capacitors?
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