Central has published several whitepapers and application notes:

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RF frequency mixers: ideal discrete devices

MOSFETs: basics, operation & ideal applications

JFETs: basics, benefits, & ideal applications

implementing basic amplification stages with small signal BJTs

enhancing PoE devices with Schottky bridge rectifiers

a cost-effective solution to current regulation

designing semiconductor circuits for trouble-free performance

practical applications for current limiting diodes

transient peak power effect on diodes

boosting the current limit of current limiting diodes

current limiting diode applications