A wideband VCO with constant tuning-gain and uniform sub-band interval for single-chip UHF RFID reader

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Abstract

A novel VCO with constant tuning-gain and uniform sub-band interval is presented in this paper for single-chip UHF RFID reader application. An optimized calculation method is proposed to attain the accurate capacitor ratio for digital-controlled capacitor array units. The resistor-biased switched-capacitor structure is used to achieve large frequency range and optimized phase noise performance. The circuit is realized in 0.18μm CMOS process and the simulation results show that the VCO features a tuning-gain from 46.8 to 50.7MHz/V with ±4% variation and a sub-band interval from 47 to 49 MHz with ±2% variation for frequencies from 3.23 to 4.03GHz and phase noise of -128.5dBc/Hz at 1MHz offset from 3.6GHz carrier. The whole circuit consumes 5.9mA from a 3.3 V to 2.5 V LDO-biased power supply.

Original languageEnglish
Title of host publicationProceedings - 2015 IEEE 11th International Conference on ASIC, ASICON 2015
EditorsJunyan Ren, Ting-Ao Tang, Fan Ye, Huihua Yu
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479984831
DOIs
StatePublished - 21 Jul 2016
Event11th IEEE International Conference on Advanced Semiconductor Integrated Circuits (ASIC), ASICON 2015 - Chengdu, China
Duration: 3 Nov 20156 Nov 2015

Publication series

NameProceedings - 2015 IEEE 11th International Conference on ASIC, ASICON 2015

Conference

Conference11th IEEE International Conference on Advanced Semiconductor Integrated Circuits (ASIC), ASICON 2015
Country/TerritoryChina
CityChengdu
Period3/11/156/11/15

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