Title :
A robust 43 GHz VCO in standard CMOS for OC-768 SONET applications
Author :
van der Wel, A.P. ; Gierkink, S.L.J. ; Frye, R.C. ; Nauta, Bram
Author_Institution :
IC Design Group, Twente Univ., Enschede, Netherlands
Abstract :
In this paper, we present a 43 GHz VCO in 0.13/spl mu/m CMOS for use in SONET OC-768 optical networks. The design has a large tune range of 4.2%, which is sufficient to hold the design center frequency over anticipated process spread and temperature variation. A tuned output buffer is used to provide 1.3 V/sub p-p/ (single-ended) into a 90 fF capacitive load as is required when the VCO is used in typical clock and data recovery (CDR) circuits. Phase noise is -90 dBc/Hz at a 1 MHz offset from the carrier; this meets SONET jitter specifications. The VCO, including output buffers, consumes 14 mA from a 1 V supply and occupies 0.06 mm/sup 2/ of die area.
Keywords :
CMOS integrated circuits; SONET; jitter; phase noise; voltage-controlled oscillators; 0.13 microns; 1 MHz; 1 V; 1.3 V; 14 mA; 43 GHz; 90 fF; CDR circuits; CMOS; OC-768 SONET applications; SONET jitter specifications; SONET optical networks; VCO; clock and data recovery circuits; design center frequency; large tuning range; phase noise; process spread; temperature variation; tuned output buffer; Clocks; Frequency; Optical buffering; Optical fiber networks; Phase noise; Robustness; SONET; Temperature distribution; Tuned circuits; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257143
