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Highly efficient integrated rectifier and voltage boosting circuits for energy harvesting applications
- Source :
- Advances in Radio Science, Vol 6, Pp 219-225 (2008)
- Publication Year :
- 2008
- Publisher :
- Copernicus Publications, 2008.
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Abstract
- This paper presents novel circuit concepts for integrated rectifiers and voltage converting interfaces for energy harvesting micro-generators. In the context of energy harvesting, usually only small voltages are supplied by vibration-driven generators. Therefore, rectification with minimum voltage losses and low reverse currents is an important issue. This is realized by novel integrated rectifiers which were fabricated and are presented in this article. Additionally, there is a crucial need for dynamic load adaptation as well as voltage up-conversion. A circuit concept is presented, which is able to obtain both requirements. This generator interface adapts its input impedance for an optimal energy transfer efficiency. Furthermore, this generator interface provides implicit voltage up-conversion, whereas the generator output energy is stored on a buffer, which is connected to the output of the voltage converting interface. As simulations express, this fully integrated converter is able to boost ac-voltages greater than |0.35 V| to an output dc-voltage of 2.0 V–2.5 V. Thereby, high harvesting efficiencies above 80% are possible within the entire operational range.
- Subjects :
- Engineering (General). Civil engineering (General)
TA1-2040
Subjects
Details
- Language :
- German, English
- ISSN :
- 16849965 and 16849973
- Volume :
- 6
- Database :
- Directory of Open Access Journals
- Journal :
- Advances in Radio Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8537254fb1eb4dbcaac5fc5a98f646c4
- Document Type :
- article