00000cab a22000003a 4500 UP-99796217609277386 Buklod 20231007234122.0 m |o d | ta 100505s xx d | ||r ||||| || DENGII eng Shaeffer, D.K. Performance-optimized microstrip coupled VCOs for 40-GHz and 43-GHz OC-768 optical transmission. pp. 1130-1138 In this paper, we present 40- and 43-GHz voltage-controlled oscillators (VCOs) for use in SONET/SDH optical transmission systems operating at OC-768 rates. SONET system jitter requirements are explained, as are methods for achieving the requisite performance in manufacturable oscillators. We describe in detail a technique for using quadrature-coupled VCOs to achieve a fundamental improvement in jitter power performance. The 40-GHz oscillator has a tuning range of 5 GHz, a single-sideband phase-noise power spectral density of -99 dBc/Hz at 1-MHz offset from the carrier, and consumes 207 mW in the oscillator core. Total power consumption is 363 mW (including biasing and output buffers) from a 3-V supply. The oscillator occupies 0.189 mm2 of die area and is implemented in a 120-GHz fT SiGe BiCMOS process. 207 mW. 3 V. 363 mW. 40 GHz. 43 GHz. OC-768. SONET/SDH optical transmission system. SiGe. SiGe BiCMOS process. Jitter power optimization. Microstrip coupled VCO. Power consumption. Quadrature-coupled VCO. Single-sideband phase noise power spectral density. Tuning range. Voltage-controlled oscillator. IEEE Journal of solid state circuits 38, 7 (2003). FO UPD DENG-II Article