A 37∼50 GHz InP HBT VCO IC for OC-768 fiber optic communication applications

Concepts

EngineeringElectrical EngineeringMicroelectronicsOptoelectronicsPhotonicsFiber OpticsFiber-optic CommunicationHigh-frequency Semiconductor DevicesOscillatorsPhotonic Integrated CircuitsRadio-frequency Integrated CircuitsColpitts OscillatorsFiber Optic Communication SystemsTuningTuning RangeVoltageVoltage-controlled Oscillator DesignVoltage-controlled Oscillators

Abstract

This paper reports a 50 GHz voltage-controlled-oscillator (VCO) integrated circuit (IC) designed for OC-768 fiber optic communication applications. Implemented with a 140 GHz f/sub t/ InP HBT technology, the VCO IC is designed based on a modified Colpitts configuration with a unique resonator to maximize the tuning range. Tuned by a single-ended voltage, the VCO exhibits 37/spl sim/50 GHz (30%) tuning range over a tuning voltage range of 1.2 V.

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