Digital Gates and Transistors in LaTeX/TikZ

While using LaTeX/TikZ for drawing digital cicuits and analog circuits, I designed some additional things. These are:

• a D flip flop
• a transmission gate and an equivalence (=xnor) gate
• a 2-to-1 multiplexer and a buffer with enable input
• an NMOSFET transistor and a PMOSFET transistor

The documentation and the licence conditions are always in the beginning of the source code.

There are still some todos. If you improve anything, please send it back to me for posting it here.