A First Dual-Mode RF Fully Digitally Controlled Oscillator in 0.13μm CMOS

The first CMOS based fully digitally controlled oscillator suitable for GSM/EDGE and UMTS transmitter is presented. Drawing an extremely low current in order to achieve the phase noise performance sufficient for both communication systems it is highly suitable for terminal applications. A coarse tuning range from 3.25 to 4.25 GHz is achieved by a combination of binary weighted and thermometer coded switchable capacitors which allow a maximum frequency step of 250 KHz. The low current consumption and the excellent phase noise performances achieved make this topology attractive for multi mode systems. A complete implementation in 0.13 μm CMOS technology is here presented

[1]  Poras T. Balsara,et al.  A first multigigahertz digitally controlled oscillator for wireless applications , 2003 .

[2]  L. Maurer,et al.  A UMTS-complaint fully digitally controlled oscillator with 100Mhz fine-tuning range in 0.13/spl mu/m CMOS , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[3]  R.B. Staszewski,et al.  A first RF digitally-controlled oscillator for mobile phones , 2005, 2005 IEEE Radio Frequency integrated Circuits (RFIC) Symposium - Digest of Papers.

[4]  A. Ismail,et al.  CMOS differential LC oscillator with suppressed up-converted flicker noise , 2003, 2003 IEEE International Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC..