1.If the following inverter biased in the middle of Vdd, what is the small signal gain? (Answer gmXro)
2. Crossection diagram of the inverter (be able to draw the contact of power supply and ground)
3. From the crossection of the diagram, be able to draw the parasitic BJT leads to latch-up.
4 . How to prevent latch-up (do not forget guard ring, clamping circuits!)