DSB-SC implementation

dsbsc ckt

hello:
iam looking for the circuit implementation of DSB-SC.
iam waiting for replies in this regard.
thanks.

dsb sc implimentation

Hi
I think you can use just one mixer.

Hi,

I taught this lab last semester and I am giving you here some basic DSB-SC (Suppressed carrier Modulation) mathematics, if you can understand the basic idea then there is no problem of implementing it.

Let you have,

x2 = y2 = z2 = 0; and x1 = A cos (ωct) and y1 = A cos (ωmt), where ωc nd ωm are the carrier and modulating frequencies.

Now use the expression; V_out = z2 + (x1 - x2) * (y1 - y2) / A, this will give the following out put expression:

V_out = A cos (ωct) * cos (ωmt) = A/2 * [cos(ωc - ωm)t + cos(ωc + ωm)t ] . this shows that the output contains two Fourier components - the sidebands.

You can construct this circuit by using two multiplier, we used AD534 in our lab.

I hope this will help you.

BR,

Arif Khan

please press helped me!!

yes arif you are right. i know abt the mathematics but the problem is wht about the oscillator i.e. how to generate the carrier and the message signal. which oscillators will i require.
thanks
waiting for ur reply.