Colpitt On/Off keying modulation

Thread Starter

KCHARROIS

Joined Jun 29, 2012
302
Hello
I currently have a colpitts oscillator working at 2 Mhz and I'm now trying to modulate On/Off keying any ideas?
Thanks
 

mcasale

Joined Jul 18, 2011
210
Not sure what you are trying to do. Is this a Morse code thing?

Is this a TTL compatible signal level?

You should be able to run the signal into a logic gate and enable/disable the other gate input.
 

PaulEE

Joined Dec 23, 2011
423
Shunt the input to the transmitter with a '4066 quad bilateral switch or FET or BJT to modulate the data...I assume the baud rate is slow enough such that a brief RC-like delay due to switching won't ruin the operation...if so, buffer the shunting device a bit more to eliminate that RC-effect/lack of current. Ya dig?
 
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