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A 11-15 GHz CMOS ÷2 frequency divider for broad-band I/Q generation

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4 Author(s)
Tedesco, A. ; Dipt. di Elettronica ed Informazione, Politecnico di Milano, Italy ; Bonfanti, A. ; Panseri, L. ; Lacaita, Andrea

This paper presents a 0.13 μm CMOS frequency divider for I/Q generation. To achieve a wide locking range, a novel topology based on two stages injection-locking ring oscillator is adopted. This architecture can reach a larger input frequency range and better phase accuracy with respect to injection-locking LC oscillators, because of the smoother slope of its phase-frequency plot. Post layout simulations show that the circuit is able to divide an input signal spanning from 6 to 24 GHz, although the available tuning range of the signal source (integrated VCO) limited the experimental verification to the interval 11-15 GHz, with a consequent measured 31% locking range. A single divider dissipates 3 mA from 1.2 V power supply.

Published in:

Research in Microelectronics and Electronics, 2005 PhD  (Volume:1 )

Date of Conference:

25-28 July 2005