A Fractional-N PLL for SONET-Quality Clock-Syntlhesis Applicationis

A Fractional-N PLL for SONET-Quality Clock-Syntlhesis Applicationis

A frequency-synthesis IC, targeted toward replacing high frequency XOs and VCXOs, is proposed. It is based on a fixed-frequency XO and a fractional-N PLL. A linearized phase detector, phase-error cancellation, and an integrated shielded LC-VCO are used. The measured jitter is 0.3ps rms in the OC-192...

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Hauptverfasser: Thomsen, A., Zhang, L., Frey, D., Yu, Q., Sun, L., Garlapati, A., Hulfachor, R., Pastorello, D., Juhn, R.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Capacitance
Clocks
Frequency conversion
Frequency synthesizers
Laboratories
Optical resonators
Phase locked loops
Surface acoustic waves
Transfer functions
Voltage-controlled oscillators
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Beschreibung
Zusammenfassung:A frequency-synthesis IC, targeted toward replacing high frequency XOs and VCXOs, is proposed. It is based on a fixed-frequency XO and a fractional-N PLL. A linearized phase detector, phase-error cancellation, and an integrated shielded LC-VCO are used. The measured jitter is 0.3ps rms in the OC-192 band. The chip draws 70mA excluding the output driver.
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.2007.373586