Amplitude Modulator - III

346

04:34:12

Do not shake. Have a little patience.

The isolated two sources on top right are there to visualize the circuit better. 

Pretty basic design

Op-amp 1 : Wien bridge Oscillator (produces carrier). 
 
Op-amp 2 : Adder and clipper. 

LC circuit : Tuned at carrier frequency this produces amplitude modulated wave.

published 11 years ago

xotabith

11 years ago

Wow!)

thebugger

11 years ago

I like it ;) simple yet viable.

sumitdhingra

11 years ago

@thebugger: I thought you hate inductors. 😅

hurz

11 years ago

Single 15V supply would be nice 7.5v voltage divider for wien brdige as ground and cap for AC coupling first and modulator stage should do the trick, ahhhhh and little adaption for the oscillator frequency might also needed. Keep up the good work!

sumitdhingra

11 years ago

Thanks! Hurz.. What do mean by adaption for Oscillator frequency? 😰

hurz

11 years ago

Because changing to single supply does also change the oscillator frequency, your output filter is for about 50kHz.

kaivanveldhoven

11 years ago

Wow! This is really impressive! Keep it up man!

sumitdhingra

11 years ago

@hurz: yes, you are right. I will see what I can do to stabilize the frequency. Thanks again.

hurz

11 years ago

You are welcome!

sumitdhingra

11 years ago

Hey hurz! I fixed the frequency instability problem. Frequency is totally cool with operating voltage now.

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