# What is inverter gain?

## What is inverter gain?

An inverter circuit outputs a voltage representing the opposite logic-level to its input. Its main function is to invert the input signal applied. If the applied input is low then the output becomes high and vice versa. An inverter circuit serves as the basic logic gate to swap between those two voltage levels.

## How can I speed up my CMOS inverter?

It is possible to speed-up the inverter by reducing the width of the PMOS device (at the expense of symmetry and noise margins)! by causing a larger parasitic capacitance. This implies that there is an optimal ratio that balances the two contradictory effects. Consider two identically sized CMOS inverters.

What are the critical voltages of a CMOS inverter?

For CMOS inverters, VOH=VDD. VOL is defined to be the output voltage of the inverter at an input voltage of VOH. We have just proven that VOL=0. The PMOS device is cut off when the input is at VDD (VSG=0 V). The NMOS device is forward biased (Vi=VGS > VTN) and therefore on.

### What is the symbol of inverter?

The Inverter is also called NOT Gate. The Schematic Symbol of a basic Inverter is shown in Figure 1 and Table 1 is its Truth-Table. A Buffer is another Logic Gate that has only one Input, its Output follows the same Logic State as the Input. The Buffer is used as delay element in Digital Electronics.

### What is RC delay in CMOS?

The RC delay model is a metric used in VLSI design to calculate the signal delay between the input voltage and output voltage of the input signal. The input signal is a step function. In this case the transistor can be considered as a switch in series with a resistor.

Why PMOS source is connected to VDD?

PMOS contains majority charge carriers as Holes and minority charge carriers as Electrons. Hence it is more capable of passing a Logic 1. Hence it is connected to VDD.

#### Is Inverter a gate?

An Inverter is a Logic Gate that has only one Input, it outputs the opposite Logic State of its Input. The Inverter is also called NOT Gate. 