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A Near-Optimum 13.56 MHz CMOS Active Rectifier With Circuit-Delay Real-Time Calibrations for High-Current Biomedical Implants
- Source :
- IEEE Journal of Solid-State Circuits. 51:1797-1809
- Publication Year :
- 2016
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2016.
-
Abstract
- In this paper, a near-optimum active rectifier is proposed to achieve well-optimized power conversion efficiency (PCE) and voltage conversion ratio (VCR) under various process, voltage, temperature (PVT) and loading conditions. The near-optimum operation includes: eliminated reverse current loss and maximized conduction time achieved by the proposed sampling-based real-time calibrations with automatic circuit-delay compensation for both on- and off-time of active diodes considering PVT variations; and power stage optimizations with adaptive sizing over a wide loading range. The design is fabricated in TSMC 65 nm process with standard I/O devices. Measurement results show more than 36% and 17% improvement in PCE and VCR, respectively, by the proposed techniques. A peak PCE of 94.8% with an $80~\Omega $ loading, a peak VCR of 98.7% with 1 $\text{k}\Omega $ loading, and a maximum output power of 248.1 mW are achieved with 2.5 V input amplitude.
- Subjects :
- Materials science
business.industry
020208 electrical & electronic engineering
Energy conversion efficiency
Electrical engineering
02 engineering and technology
020202 computer hardware & architecture
Power (physics)
Rectifier
CMOS
Sampling (signal processing)
0202 electrical engineering, electronic engineering, information engineering
Wireless power transfer
Electrical and Electronic Engineering
business
Diode
Voltage
Subjects
Details
- ISSN :
- 1558173X and 00189200
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- IEEE Journal of Solid-State Circuits
- Accession number :
- edsair.doi...........c946c61c34a21b9759450250fd838e76