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Wide tuning range LC-oscillator in 65nm SOI CMOS, based on switchable secondary inductor

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8 Author(s)
Morf, T. ; IBM Zurich Res. Lab., Zurich ; Kossel, M. ; Weiss, J. ; Menolfi, C.
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An LC-based VCO in standard 65 nm CMOS SOI technology is presented. The VCO exhibits a measured tuning range 6.4-11.3 GHz. The tuning range is significantly extended by a combination of switchable inductor and capacitor banks. The switchable inductor consists of two magnetically coupled spiral inductors. The secondary coil can be either open or closed with a large FET switch, which in closed condition significantly reduces the inductance of the main coil by means of mutual inductance.

Published in:

Electronics Letters  (Volume:43 ,  Issue: 24 )

Date of Publication:

Nov. 22 2007

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