> Did my reply not make it? > Page 95 of HH has everything you need. Sorry Dave, I may have missed your reply. But I did see Barrys reply which gave:- http://www.phys.ualberta.ca/~gingrich/phys395/notes/node97.html And now I know what a Sziklai circuit is. Looks to me like VCE(sat) would be at best 0.7V, which is this application is better than a darlington but not as good as a MOSFET. Brent Brown Electronic Design Solutions 16 English Street Hamilton, New Zealand Ph/fax: +64 7 849 0069 Mobile/text: 025 334 069 eMail: brent.brown@clear.net.nz -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body