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This book deals with the challenge of exploiting ambient
vibrational energy which can be used to power small and low-power
electronic devices, e.g. wireless sensor nodes. Generally,
particularly for low voltage amplitudes, low-loss rectification is
required to achieve high conversion efficiency. In the special case
of piezoelectric energy harvesting, pulsed charge extraction has
the potential to extract more power compared to a single rectifier.
For this purpose, a fully autonomous CMOS integrated interface
circuit for piezoelectric generators which fulfills these
requirements is presented. Due to these key properties enabling
universal usage, other CMOS designers working in the field of
energy harvesting will be encouraged to use some of the shown
structures for their own implementations. The book is unique in the
sense that it highlights the design process from scratch to the
final chip. Hence, it gives the designer a comprehensive guide of
how to (i) setup an appropriate harvester model to get realistic
simulation results, (ii) design the integrated circuits for low
power operation, (iii) setup a laboratory measurement environment
in order to extensively characterize the chip in combination with
the real harvester and finally, (iv) interpret the
simulation/measurement results in order to improve the chip
performance. Since the dimensions of all devices (transistors,
resistors etc.) are given, readers and other designers can easily
re-use the presented circuit concepts.
This book deals with the challenge of exploiting ambient
vibrational energy which can be used to power small and low-power
electronic devices, e.g. wireless sensor nodes. Generally,
particularly for low voltage amplitudes, low-loss rectification is
required to achieve high conversion efficiency. In the special case
of piezoelectric energy harvesting, pulsed charge extraction has
the potential to extract more power compared to a single rectifier.
For this purpose, a fully autonomous CMOS integrated interface
circuit for piezoelectric generators which fulfills these
requirements is presented. Due to these key properties enabling
universal usage, other CMOS designers working in the field of
energy harvesting will be encouraged to use some of the shown
structures for their own implementations. The book is unique in the
sense that it highlights the design process from scratch to the
final chip. Hence, it gives the designer a comprehensive guide of
how to (i) setup an appropriate harvester model to get realistic
simulation results, (ii) design the integrated circuits for low
power operation, (iii) setup a laboratory measurement environment
in order to extensively characterize the chip in combination with
the real harvester and finally, (iv) interpret the
simulation/measurement results in order to improve the chip
performance. Since the dimensions of all devices (transistors,
resistors etc.) are given, readers and other designers can easily
re-use the presented circuit concepts.
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