Technical Education ARKujur

CMOS INVERTER:-  CMOS inverter consists of an enhancement type nMOS transistor and an enhancement type nMOS transistor working in complementary mode.          Works in push-pull mode such that for high input nMOS transistor is on and it drives (pulls down) the output and the pMOS simply acts as the load.for low input voltage nMOS transistor is cut-off and pMOS is on and it drives (pull up) the output and the nMOS acts as load.So both pMOS and nMOS contribute equally to circuit operation. Advantages of CMOS inverter are:-  👉Low power dissipation 👉Voltage transfer curves show full swing of output voltage from 0 to Vdd. 👉Sharp transition between states,which increases the noise margin. The effective source substrate bias Vsb=0 for both the transistor.It is also observed that                   Vgs n=Vin                  VDS n=Vout          ...

MOSFET (ENHANCEMENT/DEPLETION) LOAD INVERTERS  MOSFET s with enhancement type driver and resistance as load are not well suited for VLSI circuit fabrication and in other applications as resistance is a passive elements and it is very difficult is fabricate a resistor.Also voltage transfer curves do not show sharper transition and better noise margins. So n MOS   transistor as active loads poise a better condidature for inverter circuit. Also n MOS load occupies less chip area as compared to the linear resistor.             The n MOS   load inverter is again categorised in two parts..The enhancement type n MOS   load and depletion type n MOS   load.The enhancement load inverter can again operate in two modes the saturation mode and the linear mode. The inverter circuit with saturated enhancement type nMOS load and linear enhancement type load.     The gate and drain of the load transistor are connected t...