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Design of low power 2.4 GHz CMOS LC oscillators with low phase-noise and large tuning range

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3 Author(s)
Seshan, N. ; Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA ; Rajagopalan, J. ; Mayaram, K.

The design of two 2.4 GHz CMOS LC balanced oscillators in a 0.25 μm process for Bluetooth specifications is presented. These oscillators achieve low phase noise with low power consumption. At a frequency offset of 3 MHz from the 2.4 GHz carrier, the simulated phase noise is -132 dBc/Hz for both oscillators with a power dissipation of 5-11 mW from a 2.5 V power supply. A wide tuning range of 18% is obtained by means of a PMOS varactor in conjunction with an array of switched capacitors.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:4 )

Date of Conference:

2002