Becaise they have diodes to gnd/vcc. And the common failure of a diode is a rupture of the barrier and so, it gets shorted. So the gate is shorted to ground or vcc
Enviado do meu Tele-Movel Em 22/12/2015 19:29, "Chuck Guzis" <ccl...@sydex.com> escreveu: > On 12/22/2015 01:10 PM, Alexandre Souza wrote: > >> It works if the gate is open. But if it is shorted to gnd/vcc, you're >> in trouble :) >> > > In my experience, this is the case with a lot of 4000-series CMOS. Don't > exactly understand why. > > --Chuck > > > >