modified 11 years ago

Amplitude modulation WIP

01:11:28

How can I drive this transistor non-linear so it cuts off one half of the signal?

published 11 years ago

hurz

11 years ago

I am very sorry, and i have to inform you that this "buggzy wien-bridge topologie" is quite useless for EC as long there are no proper bulbs. The amplitude is not controlable. And even in reality, Wien-Bridge oscillator are not made for RF, even if king @thebugger belive they are perfect RF oscillator... They are more common in audio area. The amplitude is uncontrolable and a bad start to experiment with AM. Use simple ac source to figure out.

thebugger

11 years ago

Actually the wien bridge oscillator is used for high frequencies (AM radio) around a few Mhz and the amplitude is controllable just put a potentiometer as a voltage divider. And yes they are less prone to distortion if properly calibrated.

thebugger

11 years ago

Imma post a proper AM so you can see some of the common ways to do it.

tpfohl

11 years ago

Thanks, but this is is not about Wien bridges. It's about mixing 2 signals additive and amplifying only the top or bottom half of the signal and putting it in a resonating circuit to convert it in to full AM.

tpfohl

11 years ago

I read about this and wanted to try it out.

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