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A toroidal inductor integrated in a standard CMOS process

  • Luca Vandi
  • Pietro Andreani
  • Enrico Temporiti
  • Enrico Sacchi
  • Ivan Bietti
  • Cesare Ghezzi
  • Rinaldo Castello
Publiceringsår: 2007
Språk: Engelska
Sidor: 39-46
Publikation/Tidskrift/Serie: Analog Integrated Circuits and Signal Processing
Volym: 50
Nummer: 1
Dokumenttyp: Artikel i tidskrift
Förlag: Springer


This paper presents a toroidal inductor integrated in a standard 0.13 mu m CMOS process. Finite-elements preliminary simulations are provided to prove the validity of the concept. In order to extract fundamental parameters by means of direct calculations, two different and well-known approaches are followed and the results are compared; this comparison provides useful guidelines for the design of the device. A very simple Pi model for low frequencies is derived from 1-port and 2-port measurements, and a good matching with general theory is observed. The coil exhibits an inductance between 0.9 nH and 1.1 nH up to 20 GHz (physical limit for the measurement equipment) and a quality factor approaching 10 at 15 GHz. No self-resonance is observed within the measurement range.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • ISSN: 0925-1030

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