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Rectigulator: a hybrid of rectifiers and regulators for miniature wirelessly powered bio-microsystems

Rectigulator: a hybrid of rectifiers and regulators for miniature wirelessly powered bio-microsystems

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At present, the existence of power decoupling capacitors is a bottleneck for the miniaturisation of wirelessly powered biomedical implants. To reduce the area of on-chip or off-chip decoupling capacitors, a new circuitry is proposed, called the ‘rectigulator’. By using two negative feedback channels in turn, the rectigulator directly converts an AC input to a well regulated DC output. Accordingly, the unregulated DC output of the conventional rectifiers no longer exists and the largest decoupling capacitor is deleted. Typically, the rectigulator makes the miniature wirelessly powered bio-microsystems 12% smaller.

References

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      • Lee, H.M., Ghovanloo, M.: `An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission', ISSCC Dig. Tech. Pprs, San Francisco, CA, USA, February 2012, p. 286–288.
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      • Chow, E.Y., Chakraborty, S.: `Mixed-signal integrated circuits for self-contained sub-cubic millimeter biomedical implants', ISSCC Dig. Tech. Pprs, San Francisco, CA, USA, February 2010, p. 236–237.
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      • Lee, S.B., Lee, H.M.: `An inductively powered scalable 32-channel wireless neural recording system-on-a-chip for neuroscience applications', ISSCC Dig. Tech. Pprs, San Francisco, CA, USA, February 2010, p. 120–121.
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      • Yakovlev, A., Pavonka, D., Meng, T.: `A mm-sized wirelessly powered and remotely controlled locomotive implantable device', ISSCC Dig. Tech. Pprs, San Francisco, CA, USA, February 2012, p. 302–304.
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