[Premium-Rx] Matching Mixer Diodes, FETs?

[Gary Geissinger]

Gentlemen,

"Back in the day" we used to purchase a large quantity of mixer diodes from the same die lot. Then we carefully matched them into quads.  The idea was to install a quad or replace the entire quad if a mixer diode was found to be defective.

Is that still the process used today with FETS as well?  I noticed that some FETS are mounted on a substrate as a quad.  Can I presume they are matched?

We found the matching massively improved performance.

Thanks,

Gary WA0SPM

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