Title :
A wide pull range hybrid VCSO for optical transmission networks
Author :
Gonda, J. ; Gunes, D. ; Holt, D.E.
Author_Institution :
AT&T Bell., North Andover, MA, USA
Abstract :
The new optical network standard SONET (synchronous optical network) requires a high-performance, low-cost VCO (voltage-controlled oscillator) at the line rate of 622.08 Mb/s. A voltage-controlled SAW (surface acoustic wave) oscillator (VCSO) was designed to meet these requirements. It contains a hybrid integrated circuit with a small number of readily available discrete components and a quartz SAW resonator. Traditionally, a SAW delay line has been used to obtain a wide tuning range with an associated penalty in noise performance. The VCSO circuit design makes a wide tuning range possible with good noise performance. An output power level of +10 dBm can be obtained with a +12-V supply at 60 mA. A total frequency pull range of 1.8 MHz (2800 ppm) and a phase-noise level of -110 dBc at 1 kHz away from the carrier have been obtained
Keywords :
hybrid integrated circuits; surface acoustic wave devices; ultrasonic devices; variable-frequency oscillators; 12 V; 60 mA; 622080 kbit/s; SAW VCO; SONET; VCSO; circuit design; frequency pull range; hybrid integrated circuit; hybrid voltage controlled SAW oscillator; optical transmission networks; phase-noise; quartz SAW resonator; synchronous optical network; tuning range; Acoustic waves; Circuit optimization; Hybrid integrated circuits; Integrated circuit noise; Optical fiber networks; Optical resonators; Optical surface waves; SONET; Surface acoustic waves; Voltage-controlled oscillators;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.66959
