I am looking for a N- channel JFET part number with IDmax > = 800 mA and low VGS(off) < -15 volts. I dont focus on the frequency As an inherent charactristics of JFETs is high working frequency but I need a good working maximum frequency of 100 MHz or above. I googled for that but Low vgs( off) jFETs are rare. The main reason I need such low vgs is its usage as a source follower with a " Large Signal" for current gain Anyone knows a part number?
Not sure if you can find such a JFET. IMO your best bet is JFET - Bipolar combo. Take a look at this ancient National app note. http://www.ti.com/lit/an/snoa620/snoa620.pdf
Hope this helps.