Title :
A 5.6∼8.2GHz QVCO with a new DCCA circuit
Author :
Ning Zhu ; Wei Li ; Ning Li ; Junyan Ren
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
The paper presents a high frequency wideband quadrature voltage-controlled oscillator (QVCO). In the QVCO, a new digital controlled capacity array (DCCA) circuit is proposed to break the trade-off between high frequency and wideband. With this new DCCA circuit, the QVCO achieves higher frequency and wider band. Parallel coupling transistors are attached to generate precise quadrature signal. A phase-shift network is introduced to eliminate Bi-mode oscillation phenomenon. The QVCO is designed with 0.13μm CMOS technology. Post simulation results show that the QVCO achieves a 5.6~8.2GHz continuous tuning range with a phase noise 106.5dBC/Hz at 1MHz offset when frequency is 8.2GHz.
Keywords :
CMOS digital integrated circuits; MMIC oscillators; digital circuits; digital control; field effect MMIC; phase noise; voltage-controlled oscillators; CMOS technology; DCCA circuit; QVCO; bi-mode oscillation phenomenon; digital controlled capacity array circuit; high frequency wideband quadrature voltage-controlled oscillator; parallel coupling transistors; phase noise; phase-shift network; post simulation; quadrature signal generation; size 0.13 mum; Couplings; Oscillators; Parasitic capacitance; Topology; Transistors; Tuning; Wideband;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467925
