http://www.learnabout-electronics.org/Oscillators/images/hartley-oscillator.gif
First question is abot the tapped inductor. What part of the voltage over the tapped coil goes to the emitter of the transistor? Is it the voltage over L2 or the whole voltage over the inductor? Does it work by raising the emitter voltage and closing the transistor when the voltage over the coil is enough compared to the base.
Also it says that the input waveform is at the emitter. I dont understand that at all, where does that wave come from? Or is that the voltage formed over R3 when C2 couples the coil voltage there?
Then I had some questions about the royer oscillator.
http://forums.adafruit.com/download/file.php?id=15544&sid=d06af7c0064ed241ce91beaace73b87c
It says in the explanation that when the top part of L1 conducts current a current is also induced in the lower part of the circuit. Does that mean that the lower part is at negative DC level then?
Links from:
http://forums.adafruit.com/viewtopic.php?f=8&t=54835
http://www.learnabout-electronics.org/Oscillators/osc21.php
First question is abot the tapped inductor. What part of the voltage over the tapped coil goes to the emitter of the transistor? Is it the voltage over L2 or the whole voltage over the inductor? Does it work by raising the emitter voltage and closing the transistor when the voltage over the coil is enough compared to the base.
Also it says that the input waveform is at the emitter. I dont understand that at all, where does that wave come from? Or is that the voltage formed over R3 when C2 couples the coil voltage there?
Then I had some questions about the royer oscillator.
http://forums.adafruit.com/download/file.php?id=15544&sid=d06af7c0064ed241ce91beaace73b87c
It says in the explanation that when the top part of L1 conducts current a current is also induced in the lower part of the circuit. Does that mean that the lower part is at negative DC level then?
Links from:
http://forums.adafruit.com/viewtopic.php?f=8&t=54835
http://www.learnabout-electronics.org/Oscillators/osc21.php