I am trying to understand how a basic TIE HIGH and TIE LOW circuit that are based on diode connected MOSFETs followed by a PMOS pullup or NMOS pull down for TIEHI/TIELO accordingly work ?
How does the pull up PMOS transistor turn on in TIE HI ? How does the pull down NMOS transistor turn on in TIE LO ?
I could not find this anywhere in this forum. If not please redirect me to that..Thanks
I have attached the circuit schematic for TIE HI..I understand that diode connected NMOS is always in saturation region and that it can act as diode. But how does the PMOS turn ON ?.