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ASK modulation and demodulation

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maximus332

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I need an ASK modulator circuit using 555 timer IC and analog switch (transistor based), also need a demodulator for the same..
pls help me..
 

does you specification say you have to use a 555IC and analogue switch?
You could use a microcontroller to do both the modulation and demodulation - what bit rate are you working at?
 

this is for my communication lab purpose......
pls help...
 

have you a specification of the requirements, .e.g. target system, baud rate, levels of ASK, carrier frequency, etc
 

no, there is no target systems... i have to show the output wave form on the CRO..
both modulated and demodulated ..
data=1khz (o/p of the astable multivibrator)
carrier frequency = 5khz (sine wave)
the 0 and 1 must be generated using a 555 timer in the astable mode , the is the input to the analog switch where the modulation is take place..
 

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