I have constructed a balanced modulator circut to create double sideband suppres

Question

I have constructed a balanced modulator circut to create double sideband suppressed carrier (DSB/SC) AW signal (see Lecture 4 slide 24) I applied the following signals mO) = 20ncos(2100nt) vots c(t) = 15cos(118000rrt) vote When I lest the output of the circuit I see that the resulting signal is actually conventional AM What have I done wrong in my circuit design? Added instead of subtracted at the arcut output Accidental switched the m(t) and c(t) inputs F or gotten to add the inverter amplifier on one ami of the modulator arcut Could have been any of (a) to (c) None of the above

Explanation / Answer

Moment , M = rxF r = OB vector = (0 - (-1.5))i + (0 - (-1.65))j + (0 - 14.3)k = 1.5i + 1.65j -14.3k F = 975*[(1/v3)(i-j-k)] = 325v3(i-j-k) M = rxF = (1.5i + 1.65j -14.3k)x(325v3(i-j-k)) = (8978.574 i -8894.136 j -84.438 k) Nm

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