mtwieg
Advanced Member level 6
I've recently been looking at designing LDMOS RF amplifiers, and one of the issues we have is the effect of drain bias voltage and output power on output capacitance of the FET (Cds). It occurred to me that one could maybe compensate out linearity in Cds by using a combination of reverse biased diodes. I did a bit of searching for similar ideas, and found lots of material on using diode linearizers for compensating input capacitance, and for general predistortion purposes, but nothing on linearizing Cds. Does anyone know if this has been discussed in literature or tried in practice, and if it works or not?