neazoi
Advanced Member level 6
Hi, I want to experiment with a bidirectional single balanced subharmonic quadrature mixer I design.
To select just one sideband and cancel the other, I think I have to feed the first LOSC port with 0 degrees and the second with 90 degrees. Then for the other sideband I need to feed these ports with 180 and 270 degrees. Am I right?
Now, one simple way to achieve all four phases required, is with a 74F74, by dividing the input frequency by four within the chip.
1. Will the square wave generated by the chip be ok to drive these kind of single balanced mixers?
2. To select either sideband, can I use just two phases instead of four, and reverse them (with a mechanical switch)? This will allow me to have a driver oscillator of 2x the output frequency and not 4x.
Thanks
To select just one sideband and cancel the other, I think I have to feed the first LOSC port with 0 degrees and the second with 90 degrees. Then for the other sideband I need to feed these ports with 180 and 270 degrees. Am I right?
Now, one simple way to achieve all four phases required, is with a 74F74, by dividing the input frequency by four within the chip.
1. Will the square wave generated by the chip be ok to drive these kind of single balanced mixers?
2. To select either sideband, can I use just two phases instead of four, and reverse them (with a mechanical switch)? This will allow me to have a driver oscillator of 2x the output frequency and not 4x.
Thanks
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