What is the effect on delay if the width of both transistors increases?

What is the effect on delay if the width of both transistors increases?

As the width of a transistor in a gate is increased, the corresponding ON current increases. Accordingly, the corresponding propagation delay decreases.

What will be the effect on output voltage if the positions of n-MOS and PMOS in CMOS inverter circuit are exchanged?

What will be the effect on output voltage if the positions of n-MOS and p-MOS in CMOS inverter circuit are exchanged? Solution: 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.

What would happen if the PMOS and N-MOS of CMOS inverter gets interchanged?

When pmos and nmos are interchanged in CMOS inverter it gives a buffer with weak output states. If again the PMOS transistor be from Vcc down so when its input goes low it passes and pulls the output high opposite to the NMOS one be at ground so when input goes high then output goes low.

Which one of the following is the main factor for reducing the latch up effect?

reduced n-well resistance Rw
One of the main factor in reducing the latch-up effect is reduced n-well resistance Rw. Reduction in Rw means that a larger lateral current is necessary to invite latch-up and higher value of holding current is also required.

Why pMOS is always connected to VDD?

This is due to the reason that all the nmos transistors share a common substrate, and a substrate can only be biased to one voltage. Similarly, body of all PMOS transitors is connected to a common terminal VDD.

How is the propagation delay in CMOS inverters determined?

From a design point of view, the parasitic capacitances present in the CMOS inverter should be aimed to be kept at a minimum value. The delay time is inversely proportional to the supply voltage . Considering that the factor is not a very strong function of ]

How are propagation delays related to conductivity of transistors?

The propagation delays are inversely proportional to the and values. This means as the conductivity of the transistors in there “on-state” increase, the delay time decrease.

What does HL stand for in CMOS inverters?

In the plot of output voltage in figure 2, there are two time intervals marked by and . Here, the “p” in the subscript stands for propagation delay. The “hl” stands for high-to-low, and “lh” stands for low-to-high. The inverters in the circuit are operating between two voltages.

Is the PMOS transistor in the cut off region?

Thus, the PMOS transistor is obviously in cut off region, so the equivalent inverter circuit formed is shown in figure 5. At the instant of switching, the drain-to-source voltage of NMOS is equal to . And also, the gate-to-source voltage for the NMOS is equal to .