We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Efficient Dual Output Regulating Rectifier and Adiabatic Charge Pump for Biomedical Applications Employing Wireless Power Transfer †.
- Authors
Almarri, Noora; Langlois, Peter; Jiang, Dai; Demosthenous, Andreas
- Abstract
A power management unit (PMU) is an essential block for diversified multi-functional low-power Internet of Things (IoT) and biomedical electronics. This paper includes a theoretical analysis of a high current, single-stage ac-dc, reconfigurable, dual output, regulating rectifier consisting of pulse width modulation (PWM) and pulse frequency modulation (PFM). The regulating rectifier provides two independently regulated supply voltages of 1.8 V and 3.3 V from an input ac voltage. The PFM control feedback consists of feedback-driven regulation to adjust the driving frequency of the power transistors through adaptive buffers in the active rectifier. The PWM/PFM mode control provides a feedback loop to adjust the conduction duration accurately and minimize power losses. The design also includes an adiabatic charge pump (CP) to provide a higher voltage level. The adiabatic CP consists of latch-up and power-saving topologies to enhance its power efficiency. Simulation results show that the dual regulating rectifier has 94.3% voltage conversion efficiency with an ac input magnitude of 3.5 Vp. The power conversion efficiency of the regulated 3.3 V output voltage is 82.3%. The adiabatic CP has an overall voltage conversion efficiency (VCE) of 92.9% with a total on-chip capacitance of 60 pF. The circuit was designed using 180 nm CMOS technology.
- Subjects
ON-chip charge pumps; ELECTRIC current rectifiers; PULSE frequency modulation; WIRELESS power transmission; PULSE width modulation; MEDICAL electronics; POWER transistors
- Publication
Journal of Low Power Electronics & Applications, 2023, Vol 13, Issue 1, p20
- ISSN
2079-9268
- Publication type
Article
- DOI
10.3390/jlpea13010020