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A Low-Power Zigbee Receiver using a Self-Oscillating Mixer

Elnaz Ansari, Russell Willmot, Rohit Deshpande

Abstract

Low power, ad-hoc wireless networks have become quite popular due to their versatility and robustness. Since these networks consist of a large number of devices in close proximity, the sensitivity requirement on individual receivers is quite relaxed. Some important requirements include minimal power consumption (which increases lifetimes of battery-powered devices), and smaller chip area (which reduces manufacturing costs and simplifies implementation). In this project we present a low power, low IF, receiver front end for Zigbee applications in the 2400-2483.5 MHz band. An LNA with a phase splitter is implemented in the front end to obtain quadrature RF signals. This stage is followed by a single cell consisting of a VCO and a mixer, which reduces size and decreases power consumption. Finally, a trans-impedance stage generates an amplified differential voltage.

1. Tedeschi, M.; Liscidini, A.; Castello, R.; , "Low-Power Quadrature Receivers for ZigBee (IEEE 802.15.4) Applications," Solid-State Circuits, IEEE Journal of , vol.45, no.9, pp.1710-1719, Sept. 2010.

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