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A 66 \mu W 86 ppm /^{\circ} C Fully-Integrated 6 MHz Wienbridge Oscillator With a 172 dB Phase Noise FOM

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4 Author(s)
De Smedt, V. ; ESAT-MICAS, Katholieke Univ. Leuven, Leuven ; De Wit, P. ; Vereecken, W. ; Steyaert, M.S.J.

This paper presents the design of a new Wienbridge topology. Its phase noise performance, low temperature dependency and low power consumption make it suitable for use in wireless sensor nodes and time-based sensor readout circuitry. The noise as well as temperature behavior of the oscillator is explained using extensive calculations. Measurements on 7 samples of the same batch show a temperature stability of 86 ppm/degC and a measured spread of 0.9% at an oscillation frequency of 6 MHz. The circuit consumes 66 muW and is realized in a 65 nm technology measuring 150 mum by 200 mum. The measured phase noise figure of merit is 172 dB at a frequency offset of 100 kHz.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:44 ,  Issue: 7 )

Date of Publication:

July 2009

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