Fractional-N frequency synthesizer for wireless communications

Hussein, Abdalla; Elmasry, M.I.

doi:10.1109/iscas.2002.1010505

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…But tolerances in fabrication process cause circuit elements mismatch so phase is no longer available by Equation (2). In fact due to random nature of fabrication mismatches, phase error can have any value depending on the mismatch.…”

Section: A R C H I V E O F S I Dmentioning

confidence: 99%

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Analysis of Oscillation Amplitude and Phase Error in Multiphase LC Oscillators

Seifi

Naimi

2013

IJE

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This work proposes a novel method to find the phase error and oscillation amplitude in multiphase LC oscillators. A mathematical approach is used to find the relationship between every stage's output phase and its coupling factor. To much more general analysis, every stage assumed to have a different coupling factor. The mismatches in LC tanks are considered as the main source of phase errors and accordingly the phase deviation of each stage is calculated in a distinct equation. Then, the amplitude of oscillation for each stage is individually derived using phase error results. Not only considering different coupling factors increases the generality of this work but also the results are in better conformance with simulations compared to previous works. The theoretical results are evaluated and confirmed through extensive simulations using ADS software.

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Section: A R C H I V E O F S I Dmentioning

confidence: 99%

“…For example, modern wireless transceivers are composed of low noise amplifiers (LNA), frequency synthesizers (FS) and filters. Frequency synthesizers use local oscillators for downconverting RF signals to base band [2,3]. This conversion is often implemented by zero IF or direct conversion receivers [4,5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Oscillation Amplitude and Phase Error in Multiphase LC Oscillators

Seifi

Naimi

2013

IJE

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“…In [30], the carry-in input of the adder is used in a feedback path to randomize the input. In [37], a 14 dB suppression of spurious tones is achieved by using the 3 output bits of the MASH modulator as a dithering signal to replace the least significant bits of the modulator.…”

Section: F' < G * * (0™)^ X Frt P-«)mentioning

confidence: 99%

DLL-based fractional-N frequency synthesizers

Zarkeshvari¹

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The author has granted a non exclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distrbute and sell theses worldwide, for commercial or non commercial purposes, in microform, paper, electronic and/or any other formats. AVIS: L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'lnternet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats. Bien que ces formulaires aient inclus dans la pagination, il n'y aura aucun contenu manquant.

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“…The frequency synthesizer with the phase locked-loop (PLL) is used widely for the sake of the high spectrum purity and the high stability. The PLL frequency synthesizer has many performance indexes, among which the phase noise and the spurs are very important [1] [2].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of the S-band PLL Frequency Synthesizer with Low Phase Noise

Tang

Xiao

et al.

2005 Asia-Pacific Microwave Conference Proceedings

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Controlled by a single chip, the S-band PLL frequency synthesizer at 2.82GHz with low phase noise is designed. Based on the study of PLL, the requirements for the phase noise of the crystal reference oscillator are theoretically estimated. And an effective method to completely eliminate the spurs caused by the single chip is presented. The phase noise of 2.82GHz PLL frequency synthesizer at 10 kHz offset is -94.3dBc/Hz, the reference spurs is better than -90dBc and the output power is over 18dBm.

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Fractional-N frequency synthesizer for wireless communications

Cited by 5 publications

References 3 publications

Analysis of Oscillation Amplitude and Phase Error in Multiphase LC Oscillators

Analysis of Oscillation Amplitude and Phase Error in Multiphase LC Oscillators

DLL-based fractional-N frequency synthesizers

Design and Analysis of the S-band PLL Frequency Synthesizer with Low Phase Noise

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