Looking for an AM modulator design

[BMWE]

Hello all!

i wanna design AM modulator. the input is a voltage of 0/3/5V ('digital voltage') and the output to the antena.

can somebody give me this circuit. the carrier freq isn't determined yet (i serched google but with no good results)

Thank you
God bless you

 

[Kral]

Re: AM modulator

Can you clarify what you mean by 0/3/5/'digital voltage'. Are these the available power supply voltages? How much power to you want to deliver to the antenna?

 

[BMWE]

Re: AM modulator

most of the digital ciruits works with '1' as 5V or 3V and '0' is around 0V.

about the power i still haven't thought about it. i w'll need one that will be suficent to a apartment communication.

 

[Kral]

Re: AM modulator

An analog multiplier makes a nice modulator, if you don't need much power. Put the carrier on the X input, and the audio on the y input, or vice-versa. Folow this with a pwer stage with the appropriate power capability.