Everyday electronic devices, especially those with integrated circuits, require a reliable high voltage power supply source that can supply powers at all times without any hiccups.
Linear regulators were the power supplies of choice until the 1970s for converting alternating current (AC) into a steady direct current (DC) for electronic devices. While this power supply type isn’t used as prevalently today, it’s still the best choice for applications that require minimal noise and ripple.
linear dc power supply are known for their poor efficiency and large size, but they do provide a noise-free output voltage. This makes them ideal for any device that requires high-frequency and low-noise, such as:
Low noise amplifiers
Automated & laboratory test equipment
Data acquisition sensors & circuits