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RE: Vf vs If for Cree Sic Schottky Diode - Measured at cathode-relevant Currents

Posted by Naz on July 7, 2009 at 01:04:09:
FWIW I've been using standard Schottkies for a some time now and although they offer much lower Vf, and often need to be stacked they are my preference for biasing small signal stages. The first time I tried them I was startled to hear the improvement over a cathode resistor supplying equal bias voltage in terms of detail, clarity and air. After many experiments I came to the (unsubstantiated) conclusion that it must be due to their extremely low dynamic resistance. Be aware though that while this can be an order of magitude lower than other diodes, and down to a small fraction of an ohm it varies dramatically from type to type so check the data sheets, they normally provide graphs. I've used this method of selection since and not been disappointed.

Naz