A CMOS 10GHz voltage controlled LC-oscillator with integrated high-Q inductor

A 10GHz fully integrated Voltage Controlled Oscillator is presented. The circuit can be tuned from 8.1 GHZ to 10.9 GHz. This corresponds with a tuning range of 29.7%. The phase noise is -113dBc/Hz at 600kHz and - 127dBc/Hz at 3MHz. The VCO-core consumes 20 mA with a 2.5V power supply. The VCO is implemented in a 0.25µm 4 metal layer standard CMOS technology. The circuit's integrated inductor has a Q-factor of approximately 50 making it comparable to bondwire and discreet coils.

[1]  Y. Greshishchev,et al.  SiGe clock and data recovery IC with linear-type PLL for 10-Gb/s SONET application , 2000, IEEE Journal of Solid-State Circuits.

[2]  HongMo Wang.  A 50 GHz VCO in 0.25 /spl mu/m CMOS , 2001, 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC (Cat. No.01CH37177).

[3]  M. Wurzer,et al.  A 40-Gb/s integrated clock and data recovery circuit in a 50-GHz f/sub T/ silicon bipolar technology , 1999 .

[4]  K.K. O,et al.  A 25.9-GHz voltage-controlled oscillator fabricated in a CMOS process , 2000, 2000 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.00CH37103).

[5]  B. Razavi,et al.  A 10-Gb/s CMOS clock and data recovery circuit , 2000, 2000 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.00CH37103).

[6]  Ali Hajimiri,et al.  A general theory of phase noise in electrical oscillators , 1998 .

[7]  Keh-Chee Jen,et al.  Fully-integrated SONET OC48 transceiver in standard CMOS , 2001, 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC (Cat. No.01CH37177).

[8]  Herbert Knapp,et al.  A 40-Gb / s Integrated Clock and Data Recovery Circuit in a 50-GHz Silicon Bipolar Technology , 1999 .

[9]  M. Steyaert,et al.  A 1.8 GHz highly-tunable low-phase-noise CMOS VCO , 2000, Proceedings of the IEEE 2000 Custom Integrated Circuits Conference (Cat. No.00CH37044).

[10]  Michiel Steyaert,et al.  Low-noise voltage-controlled oscillators using enhanced LC-tanks , 1995 .