Continuous frequency tuning by control of the magnetic field of a transformer—capacitor tank, in a selective oscillator, is explored in this work. A quadrature generator is built connecting two identical transformer—capacitor oscillator cells in a feedback loop. The topology itself assures the currents in the transformer windings are aligned in phase, while their relative amplitude determines, via magnetic coupling, oscillators’ tank reactance,i.e., oscillation frequency. This paper introduces the idea, analyzesoscillation amplitude, frequency tuning band, phase noise, and phase accuracy, and discusses design and experiments. Prototypes,realized in 65 nm CMOS, employing MOS varactors to further extend operation bandwidth, show the following performances:3.2 GHz and 7.3 GHz minimum and maximum oscillation orequency, respectively. Phase noise figure of merit of 176.5 dBat 3.2 GHz and 170.5 dB at 6.4 GHz is observed, with 24 mWmaximum power consumption and 1.5 maximum deviation fromquadrature.

A Magnetically Tuned Quadrature Oscillator / G., Cusmai; M., Repossi; G., Albasini; Mazzanti, Andrea; F., Svelto. - In: IEEE JOURNAL OF SOLID-STATE CIRCUITS. - ISSN 0018-9200. - STAMPA. - 42:12(2007), pp. 2870-2877. [10.1109/JSSC.2007.908727]

A Magnetically Tuned Quadrature Oscillator

MAZZANTI, Andrea;
2007-01-01

Abstract

Continuous frequency tuning by control of the magnetic field of a transformer—capacitor tank, in a selective oscillator, is explored in this work. A quadrature generator is built connecting two identical transformer—capacitor oscillator cells in a feedback loop. The topology itself assures the currents in the transformer windings are aligned in phase, while their relative amplitude determines, via magnetic coupling, oscillators’ tank reactance,i.e., oscillation frequency. This paper introduces the idea, analyzesoscillation amplitude, frequency tuning band, phase noise, and phase accuracy, and discusses design and experiments. Prototypes,realized in 65 nm CMOS, employing MOS varactors to further extend operation bandwidth, show the following performances:3.2 GHz and 7.3 GHz minimum and maximum oscillation orequency, respectively. Phase noise figure of merit of 176.5 dBat 3.2 GHz and 170.5 dB at 6.4 GHz is observed, with 24 mWmaximum power consumption and 1.5 maximum deviation fromquadrature.
42
12
2870
2877
A Magnetically Tuned Quadrature Oscillator / G., Cusmai; M., Repossi; G., Albasini; Mazzanti, Andrea; F., Svelto. - In: IEEE JOURNAL OF SOLID-STATE CIRCUITS. - ISSN 0018-9200. - STAMPA. - 42:12(2007), pp. 2870-2877. [10.1109/JSSC.2007.908727]
G., Cusmai; M., Repossi; G., Albasini; Mazzanti, Andrea; F., Svelto
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/585092
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 58
  • ???jsp.display-item.citation.isi??? 48
social impact