CUED Publications database

A 4 GHz non-resonant clock driver with inductor-assisted energy return to power grid

Alimadadi, M and Sheikhaei, S and Lemieux, G and Mirabbasi, S and Dunford, W and Palmer, P (2010) A 4 GHz non-resonant clock driver with inductor-assisted energy return to power grid. IEEE Transactions on Circuits and Systems I: Regular Papers, 57. pp. 2099-2108. ISSN 1549-8328

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Abstract

Power consumption of a multi-GHz local clock driver is reduced by returning energy stored in the clock-tree load capacitance back to the on-chip power-distribution grid. We call this type of return energy recycling. To achieve a nearly square clock waveform, the energy is transferred in a non-resonant way using an on-chip inductor in a configuration resembling a full-bridge DC-DC converter. A zero-voltage switching technique is implemented in the clock driver to reduce dynamic power loss associated with the high switching frequencies. A prototype implemented in 90 nm CMOS shows a power savings of 35% at 4 GHz. The area needed for the inductor in this new clock driver is about 6% of a local clock region. © 2006 IEEE.

Item Type: Article
Uncontrolled Keywords: Charge recycling energy recovery energy recycling full-bridge converter low-power clock driver multi-GHz clock switching DC-DC converter
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 08 Dec 2014 02:33
DOI: 10.1109/TCSI.2009.2037850