The ring modulator is a device for the generation of DSB-SC-AM signals. In the ring modulator, there

The ring modulator is a device for the generation of DSB-SC-AM signals. In the ring modulator, there are four ideal diodes in the shape of a ring that are controlled by two perfectly-balanced center-tapped transformers. The ring modulator ideally is a product modulator for a square-wave carrier of frequency fe and the modulating signal. The output of the product modulator is low-pass filtered. Show the output of the LPF can be the DSB-SC-AM signal, and determine a requirement between the carrier frequency and the message bandwidth that must be satisfied.

 

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