Although a mosfet current mirror would use fewer components as you only need one Rset (section three of this <http://web.mit.edu/6.012/www/SP07-L25.pdf>paper).
I guess I need to place yet another order with digikey to try some of these out. On Friday, April 7, 2017 at 5:34:49 PM UTC-4, Paul Andrews wrote: > > Here is a link > <http://www.infineon.com/dgdl/Infineon-Application_Note_Applications_for_Depletion_MOSFETs-AN-v01_00-EN.pdf?fileId=5546d4624cb7f111014cd63d1a197d94> > > to a paper about using a depletion mode MOSFET for the same purpose. It > gives this equation for calculating the resistor value, which I assume > would be the same for all depletion mode MOSFETS (!?): > > > <https://lh3.googleusercontent.com/-BIZNnjZU_6Y/WOgFjAlbUJI/AAAAAAAAAi4/6FaT3NlNgJ0hFwLOnQChLGzvyur6iVq-QCLcB/s1600/Capture.JPG> > > VGS(th) is the gate threshold voltage of the MOSFET, IDSS is the on > current at VGS = 0 V and ID is the required current. > > > There are plenty of these around with suitable voltage characteristics. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/33831f40-c2a4-4cd6-b18b-a49d604165f7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
