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A Charge-Domain Auto- and Cross-Correlation Based Data Synchronization Scheme With Power- and Area-Efficient PLL for Impulse Radio UWB Receiver

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3 Author(s)
Lechang Liu ; Inst. of Ind. Sci., Univ. of Tokyo, Tokyo, Japan ; Sakurai, T. ; Takamiya, M.

A 1.2 V 100 Mb/s 2.93 mW discrete-time charge-domain impulse radio ultra-wideband (IR-UWB) receiver is developed in 65 nm CMOS. In the charge-domain, the template of the correlator is represented by capacitance and the correlation is implemented by charge addition instead of voltage multiplication and voltage integration. Power consumption of the charge-domain receiver is minimized by a novel auto- and cross-correlation based synchronization scheme. To reduce the power consumption and the chip area of the PLL clock generator for the receiver, a dual charge-pump PLL is proposed to scale up the capacitance of the loop filter without extra charge-pump current. The developed UWB receiver with the area- and power-efficient PLL achieves the energy consumption of 29.3 pJ/bit with the 62.5-ps timing step for data synchronization.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:46 ,  Issue: 6 )