QPSK Ring Modulator: Basics

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Guruditya Sinha

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Hi,

I want to know the schematic that should be used for a QPSK ring modulator? A basic functional schematic should be great.

Best Regards
Guruditya Sinha
 

Ring modulator :- https://en.wikipedia.org/wiki/Ring_modulation
You can use it to switch the carrier phase 180 degrees, not 90. If you had two and fed the carrier into the second in quadrature, if the two outputs were summed, you would have all 4 phases available.
Frank
 

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