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- Title
Variable-ratio digital frequency dividers: Analogue design methodology and phase noise analysis based on harmonic balance.
- Authors
Detratti, Marco; Pascual, Juan Pablo
- Abstract
A unifying analogue description of the operation principle of digital dividers is proposed. A simple switched-ring oscillator is used as the basic block to build a reference model of fixed-ratio dividers, which is extended to variable-ratio dividers, serving as a design guide. The concept of variable-ratio digital frequency dividers as switched-ring oscillators justifies the proposal of a procedure for analyzing added phase noise across their whole operating bandwidth, based on a prior harmonic balance (HB) simulation and taking into account single transistor noise source models. Application of HB and Envelope-Transient simulation techniques to digital dividers is discussed. A 3–4 dual-modulus prescaler implemented in Source-Coupled FET Logic (SCFL) and manufactured in commercially available GaAs technology provides an example to illustrate the method. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.
- Subjects
DIGITAL divide; ELECTRIC oscillators; NOISE; FREQUENCY dividers; FREQUENCY changers
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2009, Vol 19, Issue 5, p529
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.20375