A CMOS High-Voltage DC-DC Up Converter Dedicated for Ultrasonic Applications
IWSOC '04 Proceedings of the System-on-Chip for Real-Time Applications, 4th IEEE International Workshop
Future tech: Mike Villas's world
IEEE Spectrum
Managing care through the air [remote health monitoring]
IEEE Spectrum
A feedforward 10× CMOS current-ripple suppressor for switching power supplies
IEEE Transactions on Circuits and Systems II: Express Briefs
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While the large passive elements of power converters are in the way of converging walls of shrinking cell phones and cameras, the new capabilities these devices flaunt are creating additional burdens and making it difficult to meet specifications without even bigger elements. Active circuits that enhance the effects of passive elements will allow power converters to handle larger loads and get smaller at the same time. This paper presents a predictive inductor multiplier circuit that amplifies the effective inductance in a Buck converter. The output ripple of the simulated converter is so small that the converter appears to have an inductance thirty-eight times the value actually used. Compensating for small inductors introduces new power losses, but it is discovered that linear regulators and faster switching converters can be even less efficient