The design of two 2.4GHz CMOS LC balanced oscillators in a 0.2Spn process for Bluetooth specifications is presented. These oscillators achieve low phase noise with low power consumption. At a frequency offset of 3MHz from the 2.4GHz d e r , the simulated phase noise is -132dBa for both the oscillatop with a power dissipation of 5-11mW from a 2.5V power supply. A wide tuning range of 18% is obtained by means of a PMOS varactor in' conjunction with an array of switched capacitors.
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