A bipolar 555 can dump a surprising amount of current, so it’s perfectly happy with a MOSFET. We’re warned that the CMOS variants don’t have this current feature, and he admits that the 555 ...

which consume less power (see FET and MOSFET). Bipolar transistors are available as individually packaged discrete components as well as by the hundreds of thousands on a single chip. THIS ...

This course presents in-depth discussion and analysis of metal-oxide-semiconductor field-effect transistors (MOSFETs) and bipolar junction transistors (BJTs) including the equilibrium characteristics, ...