A single-LC-tank 5–10 GHz quadrature local oscillator for cognitive radio applications

Author

Lu, Jianhua ; Wang, Ning-Yi ; Chang, Mau-Chung Frank

Author_Institution

Univ. of California, Los Angeles, CA, USA

fYear

2011

fDate

5-7 June 2011

Firstpage

1

Lastpage

4

Abstract

This paper presents a local oscillator (LO) that converts oscillation frequencies of 13.3-20GHz from a single-LC-tank VCO to the intended 5-10GHz with continuous frequency coverage. A 4-stage differential injection-locked ring oscillator (ILRO) is used after the latch-based divider to produce quadrature output phases without requiring 50% duty cycle of input signals as those of conventional divide-by-2 approaches. When implemented in 65nm CMOS, the prototype LO consumes 22mA at 1V supply and is able to exhibit a worst-case phase noise of -102dBc/Hz at 1MHz offset across the entire 5-10GHz band for projected cognitive radio applications.

Keywords

CMOS analogue integrated circuits; MMIC oscillators; cognitive radio; field effect MMIC; injection locked oscillators; voltage-controlled oscillators; 4-stage differential injection-locked ring oscillator; CMOS technology; ILRO; LO; cognitive radio applications; current 22 mA; frequency 13.3 GHz to 20 GHz; frequency 5 GHz to 10 GHz; latch-based divider; oscillation frequencies; phase noise; quadrature output phases; single-LC-tank VCO; single-LC-tank quadrature local oscillator; size 65 nm; voltage 1 V; CMOS integrated circuits; Frequency conversion; Latches; Logic gates; MOS devices; Phase noise; Voltage-controlled oscillators; CMOS; Cognitive Radio; Injection-locked ring oscillator; LC-VCO; Quadrature Phase Local Oscillator;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2011 IEEE

Conference_Location

Baltimore, MD

ISSN

1529-2517

Print_ISBN

978-1-4244-8293-1

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2011.5940682

Filename

5940682