A 6GHz all-digital fractional-N frequency synthesizer using FIR-embedded noise filtering technique
Journal
IEEE Transactions on Circuits and Systems II: Express Briefs
Journal Volume
59
Journal Issue
5
Pages
267-271
Date Issued
2012-05
Author(s)
Abstract
A 6-GHz all-digital fractional-N frequency synthesizer using an FIR-embedded noise filtering technique is presented. This noise filtering technique is realized in the digital domain without multiple matched analog components. This fractional-N frequency synthesizer is fabricated in a 90-nm CMOS process, and it occupies 0.18 mm2. Its power is 28.8 mW with a supply of 1.2 V. The measured out-of-band phase noise at an offset of half the reference frequency is improved by more than 13 dB around 6 GHz considering cancellation variations for different output frequencies. © 2004-2012 IEEE.
Subjects
All-digital; delta-sigma modulator (DSM); digitally controlled oscillator (DCO); frequency synthesizer; quantization noise; time-to-digital converter (TDC)
SDGs
Other Subjects
FIR filters; Frequency converters; Modulators; Phase noise; All digital; Delta sigma modulator; Digitally controlled oscillators; Quantization noise; Time to digital converters; Frequency synthesizers
Type
journal article