A 900-MHz local oscillator using a DLL-based frequency multiplier technique for PCS applications

Autor:	P.R. Gray, G. Chien
Rok vydání:	2000
Předmět:	Engineering business.industry Frequency multiplier Local oscillator Electrical engineering Time division multiple access Voltage-controlled oscillator CMOS Phase noise Electronic engineering Wireless Electrical and Electronic Engineering Transceiver business
Zdroj:	IEEE Journal of Solid-State Circuits. 35:1996-1999
ISSN:	1558-173X 0018-9200
DOI:	10.1109/4.890315
Popis:	One approach to implementation of low-phase-noise integrated fixed-frequency local oscillators (LOs) for use as the RF LO in a blockdown-convert receiver architecture for PCS wireless communications down-converts the entire RF band to a lower frequency using a fixed-frequency LO. This allows new approaches to the implementation of low-phase-noise oscillators with low-Q components. The technique uses a DLL-based frequency multiplier to synthesize a RF LO whose phase noise is closely related to that of the reference crystal and not dependent on the phase noise of a VCO. An experimental prototype generates a 900 MHz signal and is designed to meet the requirements of the IS-137 standard. The device achieves a phase noise of -123dBc/Hz at a 60 kHz offset frequency with 39 mA overall current consumption from a 3.3 V supply. This prototype was fabricated in 0.35 /spl mu/m double-poly five-metal CMOS.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ee0f9ae7434c44142e0a42f7c0ab34c8 https://doi.org/10.1109/4.890315 Zobrazit plný text záznamu