Variable-ratio digital frequency dividers: Analogue design methodology and phase noise analysis based on harmonic balance
✍ Scribed by Marco Detratti; Juan Pablo Pascual
- Book ID
- 102512319
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 324 KB
- Volume
- 19
- Category
- Article
- ISSN
- 1096-4290
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✦ Synopsis
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. V