==An Overview of The Main Difference Between Analog and Digital Circuit SimulationSimulations ==
Analog devices and circuits operate in a continuous domain, where node voltages and branch currents can take arbitrary (positive or negative) values. These quantities can be varied continuously as a function of time. In contrast, digital devices and circuits operate in a discrete domain, where the device pins and circuit nodes have a binary state of either HIGH (1) or LOW (0) at any given instant of time.