http://www.4qdtec.com/mircl.html
test any MosFet device.
http://www.4qd.co.uk/serv/mostest.html
can produce high speed output signals with fast rise and full times.
http://www.imagineeringezine.com/PDF-FILES/pushpul.pdf
This circuit can produce high speed output signals with fast rise and full times. The unique change
http://www.discovercircuits.com/PDF-FILES/pushpul.pdf
Steve Bolt came up with an interesting smokeless 4-transistor H-bridge variant, i.e. no combination of inputs can cause the bridge to self-destruct.
http://www.solarbotics.net/library/circuits/driver_4varHbridge.html
some basic tests
http://www.elexp.com/t_test.htm
very simple electronic instrument
http://www.aaroncake.net/circuits/torgan.htm
http://www.edn.com/article/CA185952.html
http://ourworld.compuserve.com/homepages/Bill_Bowden/page10.htm#outline.gif
http://www.mrs.bt.co.uk/dubus/8801-2.pdf