By Woogeun Rhee (auth.), Arthur van Roermund, Michiel Steyaert, Johan H. Huijsing (eds.)
This booklet comprises the contribution of 18 tutorials of the twelfth Workshop on Advances in Analog Circuit layout. it's quantity 12 within the profitable sequence of Analog Circuit layout, supplying important info and perfect overviews of analog circuit layout, CAD, and RF structures. The sequence could be obvious as a connection with these fascinated about analog and mixed-signal layout.
Each publication discusses 3 particular subject matters on new and useful layout rules within the region of analog circuit layout. each one subject is mentioned by means of six specialists within the box and state of the art info is shared and overviewed. during this twelfth variation the themes are Fractional-N Synthesizers, layout for Robustness, and Line and Bus Drivers.
Analog Circuit Design is a necessary reference resource for analog layout engineers and researchers that desire to continue abreast with the most recent advancements within the box. the educational assurance additionally makes it appropriate to be used in a complicated layout path.
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Extra resources for Analog Circuit Design: Fractional-N Synthesizers, Design for Robustness, Line and Bus Drivers
In every case, we will assume that and s=jw. 31 Once the open loop transfer function is calculated, the last step in the design process is to realize an appropriate loop filter implementation. The methodology of doing so will be explained later in this document. 2. Definitions Given the above background, we can summarize the design process as 1) Designing G(f) to achieve desired closed loop characteristics, 2) Designing A(f) to realize the desired G(f). In this section, we will outline notation and background to provide understanding of how to accomplish step 1.
Introduction Fractional-N frequency synthesizers provide high speed frequency sources that can be accurately set with very high resolution, which is of significant value to many communication systems. Figure 1 illustrates this PLL architecture, which consists of a phase-frequency detector (PFD), charge pump, loop filter, voltage controlled oscillator (VCO), and a frequency divider that is dithered between integer values to achieve fractional divide ratios. The realization of fractional divide ratios allows the synthesizer to achieve very high frequency resolution.
The step size is chosen to be large enough to knock the synthesizer out of frequency lock --- the corresponding oscillations in the VCO output frequency are a result of cycle slipping before the VCO becomes frequency locked again. The subsequent ramp in divide value illustrates the high resolution of the synthesizer as its output frequency is varied over a 40 MHz range. For this simulation, 260 thousand time steps were computed in less than 5 seconds. 47 A noise simulation of the prototype (constructed from the simulated VCO input) is shown in Figure 24 with the input to the modulator being held constant.
Analog Circuit Design: Fractional-N Synthesizers, Design for Robustness, Line and Bus Drivers by Woogeun Rhee (auth.), Arthur van Roermund, Michiel Steyaert, Johan H. Huijsing (eds.)