The n-MOS invertor is better than BJT in terms of:
The n-MOS invertor is better than BJT invertor due to fast switching time, low power loss, smaller overall layout area.
The n-MOS invertor consists of n-MOS transistor as driven and
the n-MOS inverter consists of n-MOS and resistor or depletion mode n-MOS or enhancement mode n-MOS at the pull up load.
If the n-MOS and p-MOS of the CMOS inverters are interchanged the output is measured at:
When the transistors are interchanged, The drain of n-MOS is connected to supply voltage, drain of p-MOS is connected to ground . The output is measured at source of both the transistors.
What will be the effect on output voltage if the positions of n-MOS and p-MOS in CMOS inverter circuit are exchanged?
When the input is low, p-MOS is ON and the output is pulled down to the ground. When the input is high, n-MOS is ON and the output is pulled up to the supply voltage.
The average power dissipated in resistive load n-MOS inverter is:
When the input voltage is equal to VOH on the other hand, both the driver MOSFET and the load resistor conduct a nonzero current. Since the output voltage in this case is equal to VOL, DC power consumption of the inverter can be estimated as VDD.(VDD-VOL)/2R
The depletion mode n-MOS as an active load is better than enhancement load n-MOS in:
The depletion mode n-MOS transistor as load requires single power supply, smaller overall layout area, and sharp VTC transition.
The enhancement mode n-MOS load inverter requires 2 different supply voltages to:
The enhancement mode n-MOS load inverter requires 2 different supply voltages to keep load transistor in linear region.
The CMOS inverter consist of:
The CMOS inverter consist of enhancement mode p-MOS and enhancement mode n-MOS.
In the CMOS inverter the output voltage is measured across:
In the CMOS inverter the output voltage is measured across Drain of n-MOS transistor and ground.
When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, the transistors are operating in:
When the input of the CMOS inverter is equal to Inverter Threshold Voltage Vth, both the transistors are operating in saturation region