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A Fully-Differential Complementary Hartley VCO in 0.18 <tex> $\mu$</tex>m CMOS Technology
Joonhong Park,Junyoung Park,Youngwan Choi,Kweebo Sim,Donghyun Baek IEEE 2010 IEEE microwave and wireless components letters Vol.20 No.2
<P>In this letter, a new complementary Hartley (C-Hartley) voltage controlled oscillator (VCO) with fully differential outputs is proposed, in which the self-biasing configuration is introduced to solve the biasing difficulty of a Hartley VCO by employing a five-port transformer. The proposed C-Hartley VCO with the center frequency of 5.6 GHz is implemented in a 1P6M 0.18 μm CMOS process. The measurement result shows that the phase noise is -123.6 dBc/Hz at 1 MHz offset frequency, while dissipating 6.5 mA from 1.6 V supply with the FOM of -188.5 dBc.</P>