Analog voltage is a continuous and variable voltage that can take any value within a given range. In electronic systems, analog voltage represents a physical or measurable quantity such as temperature, light level, or sound pressure.

Analog signals are typically processed using devices like amplifiers, filters, and analog-to-digital converters (ADCs). Amplifiers boost the signal strength, filters remove unwanted noise, and ADCs convert the continuous signal into a digital one for microcontrollers or computers.

In some circuits, voltage is also used to control parameters. For example, in a power supply, analog voltage helps regulate the output to deliver proper energy to the load. In feedback control systems, voltage is adjusted to ensure stability, precision, and reliability.

Is Analog Voltage AC or DC?
Analog voltage can be either AC (Alternating Current) or DC (Direct Current).

An AC analog voltage oscillates between positive and negative values, periodically changing direction. It's commonly used for signals that represent sound, video, or power transfer, which vary over time.

A DC analog voltage is stable and flows in one direction, typically representing fixed readings from sensors such as temperature or light level.

Important Note: Both AC and DC analog voltages are continuous signals that can carry rich information. Unlike digital signals, which jump between fixed values, analog signals can smoothly vary — making them ideal for reflecting real-world phenomena.