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Article: A fully integrated CMOS VCO for DCS-1800 direct conversion receivers.(Technical Feature)(analysis of restrictive phase noise requirements with complementary metal oxide semiconductor voltage-controlled oscillators)
- Article from:
- Microwave Journal
- Article date:
- September 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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The goal of this article is to prove that restrictive phase noise requirements cart be achieved with a fully integrated CMOS VCO if the LC tank circuit is properly designed. The VCO has been designed in a standard two-metal layer process with 0.8 [micro]m CMOS transistors. The measured phase noise is -103.8 dBc/11z at 100 kHz from a 1.8 GHz carrier. The output frequency range is from 1.65 to 1.95 GHz. These phase noise and oscillation frequency values meet the requirements for a DCS-1800 direct conversion receiver The core power consumption is 8 mA from a 5 V voltage supply.
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