What type of circuit is used to control the amount of voltage from a power supply?

A regulator circuit is specifically designed to maintain a consistent output voltage regardless of changes in input voltage and load conditions. This is crucial in electronics where the stability of the voltage supply is necessary for the proper operation of devices and circuits. Regulators can provide either a fixed output voltage or an adjustable output voltage, depending on the design and application.

Regulators typically use feedback mechanisms to sense the output voltage and adjust the input accordingly, ensuring that the output remains stable. This is essential in powering sensitive components, such as microcontrollers and amplifiers, which can be adversely affected by voltage fluctuations.

Other types of circuits, such as oscillators, filters, and phase inverters, serve different functions. Oscillators generate waveforms, filters are used to remove unwanted components from signals, and phase inverters are utilized to change the phase of a signal. While these circuits can be important in various applications, they do not specifically focus on controlling the voltage from a power supply in the same way that regulators do.