Title :
A 9.8-11.5-GHz quadrature ring oscillator for optical receivers
Author :
Van der Tang, Johan D. ; Kasperkovitz, Dieter ; Van Roermund, Arthur
Author_Institution :
Mixed-Signal Microelectron. Group, Eindhoven Univ. of Technol., Netherlands
fDate :
3/1/2002 12:00:00 AM
Abstract :
This paper describes a quadrature ring oscillator that is tunable from 9.8 to 11.5 GHz in a 30-GHz fT BiCMOS technology. The ring oscillator can be used in advanced data clock recovery architectures in optical receivers. The circuit implementation of the oscillator uses transistors as active inductances. Isolation between the oscillator and cascaded circuits, such as buffers and flip-flops, is improved by utilizing the active inductances in a cascode configuration. Carrier to noise ratios better than 94 dBc/Hz at 2-MHz offset are measured with 75-mW dissipation and 2.7-V supply voltage. The evolution in two-stage ring oscillator topologies, leading to the realized design, is discussed in detail on the circuit level
Keywords :
BiCMOS analogue integrated circuits; circuit tuning; integrated circuit design; integrated circuit noise; microwave integrated circuits; microwave oscillators; optical receivers; phase noise; synchronisation; 10 Gbit/s; 2.7 V; 30 GHz; 75 mW; 9.8 to 11.5 GHz; BiCMOS technology; active inductances; bipolar transistor oscillators; carrier to noise ratios; cascode configuration; circuit level design; data clock recovery architectures; isolation improvement; optical receivers; phase noise; power dissipation; quadrature ring oscillator; supply voltage; tunable ring oscillator; two-stage ring oscillator topologies; BiCMOS integrated circuits; Circuit noise; Clocks; Flip-flops; Isolation technology; Optical buffering; Optical receivers; Ring oscillators; Transistors; Tunable circuits and devices;
Journal_Title :
Solid-State Circuits, IEEE Journal of
