Low noise power supply for precision Analog-to-Digital Converters in battery monitoring systems

The subject of this article is the development and the testing of a low noise DC-DC power supply for high precision Analog-to-Digital Converters and signal conditioning circuits in a battery monitoring systems. The synthesized structural diagram includes a low voltage input DC power supply, a resonant voltage inverter, a fast recovery rectifier, a filter and a linear voltage regulator. Different types of rectifiers and filters are tested as well as different linear voltage regulators. A Zero Voltage Switching Royer oscillator is used for maximal efficiency of the step-up converter and minimal radio interference and noise.