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Can anyone explain me how the balanced modulator works?

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SherlockBenedict

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I know that balanced modulator removes the carrier frequency from the Amplitude modulated input signal. Here's the circuit that I saw but I couldn't understand its working. I know the working of ring modulator so you need not explain me that.

8597896400_1358323755.jpg

Thanks
 

Thats a SSB modulation method from a transceiver, right ?
Thomas
 

A true multiplication of two sine waves produces the sum and difference frequencies. Neither original frequency is present.

sin(A).sin(B) = 0.5 cos(A-B) - 0.5 cos(A+B)

A ring modulator is an approximation to that, with harmonics.

Keith
 

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