Basic Amplitude Modulation Example

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02:42:37

This is the most barebones amplitude modulation circuit you can make.  It doesn't work very well, but the method is demonstrated here with minimal compnents so that the concept of how these circuits work is evident...  A more complicated one is on the way

Notice that removal of the diode (a nonlinear component) would result in the ADDITION of the two signals, instead of multiplication which is needed.

published 10 years ago

p_upadhay

10 years ago

Best example

Karma247

10 years ago

I'm no expert, but shouldn't the 1kHz signal be influencing the amplitude of the 500 kHz signal? This is just creating a 4.2MHz ringing in the inductor. The scope looks the same, even if the 1kHz is disconnected. I look forward to seeing your next version.

petester

10 years ago

Karma247 you're right. The important thing in this example is the diode, I'm trying to figure out how to make a circuit that works properly

Karma247

10 years ago

There are some good examples on here. @thebugger has even done a stereo AM circuit, he usually has very good descriptions also.

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