Title :
The design of a 1 V, 1 GHz CMOS VCO circuit with in-phase and quadrature-phase outputs
Author :
Sugimoto, Yasuhiro ; Ueno, Takeshi
Author_Institution :
Dept. of Electr. & Electron. Eng., Chuo Univ., Tokyo, Japan
Abstract :
A CMOS ring-oscillator type VCO circuit with inphase (I) and quadrature-phase (Q) outputs has been designed by using 0.6 μm MOS devices. This VCO has demonstrated 1 V and 1 GHz operational capabilities. Two differential delay cells has been used as one delay section and the transitions of the delay cell outputs have been combined, and thus the 1 GHz 1/Q output generation has been realized. The current-mode approach throughout the design has resulted in the extremely low voltage operation. The simulation results show more than 1.4 GHz oscillation frequency from a 1 V power supply, and less than ±1 phase error for I/Q outputs when Vth variation is 10 mV
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; voltage-controlled oscillators; 0.6 micron; 1 V; 1 to 1.4 GHz; CMOS VCO circuit; LV operation; current-mode approach; delay section; differential delay cells; in-phase outputs; low voltage operation; quadrature-phase outputs; ring-oscillator type; Analog circuits; Circuit simulation; Communication equipment; Delay effects; Design engineering; Frequency; Low voltage; MOS devices; Signal generators; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608698
