Title :
Low power quadrature VCO with the back-gate coupling
Author :
Kim, Hye-Ryoung ; Oh, Seung-Min ; Kim, Sung-Do ; You, Young-Sik ; Lee, Sang-Gug
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Daejon, South Korea
Abstract :
A new quadrature VCO (QVCO) is proposed with the NMOS back-gate as a coupling transistors. The advantage of proposed QVCO is analyzed in terms of power consumption and phase noise. Additional design techniques are applied to improve the symmetry of the complimentary VCO and to suppress the tail current noise contribution. The very low power QVCO has been fabricated in 0.18/spl mu/m CMOS technology for 1GHz band operation and obtained phase noise of -120 dBc/Hz at 1 MHz offset while dissipating only 3 mA for the whole QVCO from 1.8V supply.
Keywords :
CMOS integrated circuits; coupled circuits; integrated circuit design; low-power electronics; phase noise; voltage-controlled oscillators; 0.18 micron; 1 MHz; 1.8 V; 3 mA; NMOS back-gate; back-gate coupling; coupling transistors; low power quadrature VCO; phase noise; power consumption; tail current noise contribution; Capacitors; Circuit noise; Circuit topology; Coupling circuits; Degradation; Energy consumption; Phase noise; Power dissipation; Transconductance; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257231
