A digitally controlled 2.4-GHz oscillator in 65-nm CMOS

Liangge Xu, Saska Lindfors, Kari Stadius, Jussi Ryynanen

Research output: Contribution to journalConference articleResearchpeer-review


This article presents a 2.4-GHz digitally controlled oscillator (DCO) for the ISM band. The circuit is designed using a 65-nm CMOS technology with an operating voltage of 1.2 V. The DCO comprises an LC oscillator core and the digital interface logic. The measured total frequency range is from 2.26 to 3.04 GHz. Its frequency quantization step is approximately 20 kHz, and using a digital I I"-modulator pound (SDM), its effective frequency resolution is better than 1 kHz. Current consumption of the oscillator core is tunable through a 6-bit digital word. The measured phase noise is -122 dBc/Hz at 1-MHz offset frequency with 4.8-mA current consumption.
Original languageEnglish
JournalAnalog Integrated Circuits and Signal Processing
Issue number1
Pages (from-to)35-42
Publication statusPublished - 2009
Externally publishedYes
EventNorchip Conference - Aalborg, DENMARK
Duration: 1 Jan 2007 → …
Conference number: 25


ConferenceNorchip Conference
CityAalborg, DENMARK
Period01/01/2007 → …


Dive into the research topics of 'A digitally controlled 2.4-GHz oscillator in 65-nm CMOS'. Together they form a unique fingerprint.

Cite this