A.M. - single 9V source

347

03:44:27

Purple = carrier wave
Green = information signal 
Orange = Amplitude Modulated signal

Purple carrier wave ~75kHz square wave created with op amp, low pass filtered twice with RC network to vaguely resemble a sine wave then amplified by op amp. 

Green information signal ~150 Hz square wave generated by 555, low pass filtered thrice with RC network to vaguely resemble sine wave, then amplified by op amp.  

Green modulates Purple via n-channel MOSFET to create Orange, the AM signal.

published 4 years ago

kiani

4 years ago

Why 555 ! and alk the filtering.. Input signal can just be an ac source...

vaporf15e

4 years ago

Yes, kiani, that would simplify things. Unfortunately I don’t own a signal generator in real life, so I used components I do have on hand like the 555..for when i inevitably feel like trying to make this on a breadboard.

kiani

4 years ago

Right I used to do the same, until I realised EC only works best with arround 10 components... So ccts. Need to be represented as blocks.. Like an ac source instead of all the associated parts to make an osc.. I am sure you ll come to the same conclusion.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.