Title :
Octave tunable, highly linear, RC-ring oscillator with differential fine-coarse tuning, quadrature outputs and amplitude control for fiber optic transceivers
Author :
Sanduleanu, M.A.T. ; van Goor, D. ; Veenstra, H.
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
Abstract :
This paper presents a low-voltage, RC-ring oscillator for fiber optic transceivers (SDH/SONET applications). It has one octave coarse tuning range, differential tuning inputs, quadrature outputs and a linear fine-control. A replica biasing circuit regulates the common-mode voltage and the amplitude at the output. The oscillator has been realized in a pre-production 70 GHz f/sub T/, SiGe BiCMOS process (QUBIC4G). The tuning range covered with process and temperature variations is 3.4-6.8 GHz. At 6.6 GHz oscillation frequency the measured phase noise is -92 dBc/Hz at 3 MHz; offset from the carrier. The typical power consumption of the VCO core is 80 mW from a 2.5 V power supply and the area is 0.3 mm/sup 2/.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; MMIC oscillators; circuit tuning; optical communication equipment; semiconductor materials; transceivers; voltage-controlled oscillators; 2.5 V; 3.4 to 6.8 GHz; 70 GHz; 80 mW; QUBIC4G process; RC-ring oscillator; SDH/SONET applications; SiGe; SiGe BiCMOS process; common-mode voltage; differential tuning inputs; fiber optic transceivers; linear fine-control; low-voltage oscillator; octave coarse tuning range; quadrature outputs; replica biasing circuit; Circuit optimization; Optical fibers; Optical tuning; Oscillators; SONET; Silicon germanium; Synchronous digital hierarchy; Transceivers; Tunable circuits and devices; Voltage;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2002 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7246-8
DOI :
10.1109/RFIC.2002.1012085
