The design of a 1 V, 1 GHz CMOS VCO circuit with in-phase and quadrature-phase outputs
- 22 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 1, 269-272
- https://doi.org/10.1109/iscas.1997.608698
Abstract
A CMOS ring-oscillator type VCO circuit with inphase (I) and quadrature-phase (Q) outputs has been designed by using 0.6 /spl mu/m 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 /spl plusmn/1 phase error for I/Q outputs when Vth variation is 10 mV.Keywords
This publication has 3 references indexed in Scilit:
- Low-power radio-frequency ICs for portable communicationsProceedings of the IEEE, 1995
- A 6 GHz 68 mW BiCMOS phase-locked loopIEEE Journal of Solid-State Circuits, 1994
- A 1.9-GHz-band GaAs direct-quadrature modulator IC with a phase shifterIEEE Journal of Solid-State Circuits, 1993