Power Measurement Solutions

Power supplies are an important part of any electronic system. Older designs used to use linear power supplies. However, linear power supplies have a lot of power loss. Modern designs use switching DC-DC converters for power supplies. The main advantage of the switching DC-DC converters is that they have very high efficiency compared to linear power supplies.    All power supplies have input impedance, output impedance, reverse transfer impedance, PSRR. Loop stability is another important parameter for a power supply. Test and measurement of these parameters are of utmost importance in power supply design. Input and output impedance of a power supply require DC biased impedance measurement. Measuring impedances in the range of ohms is easier with good accuracy. The real measurement challenge comes into play when we need to measure very low impedances, in the range of milli and micro ohms. Various factors need to be studied to perform high fidelity low impedance measurements. U...