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., 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 70GHz f/sub T/, SiGe, BiCMOS process (QUBIC4G). The tuning range covered with process and temperature variations is 3.4GHz-6.8GHz. At 6.6GHz oscillation frequency the measured phase noise is -92dBc/Hz @ 3MHz offset from the carrier. The typical power consumption of the VCO core is 80mW from a 2.5V power supply and the area is 0.3mm/sup 2/.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; RC circuits; circuit tuning; optical fibre communication; phase noise; semiconductor materials; transceivers; voltage-controlled oscillators; 2.5 V; 3.4 to 6.8 GHz; 80 mW; SDH/SONET; SiGe; SiGe BiCMOS process; VCO; amplitude control; differential fine-coarse tuning; fiber optic transceiver; low-voltage linear RC-ring oscillator; phase noise; power consumption; quadrature output; replica biasing circuit; Circuit optimization; Optical fibers; Optical tuning; Oscillators; SONET; Silicon germanium; Synchronous digital hierarchy; Transceivers; Tunable circuits and devices; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011677
