lnstitut für Sensorik und Elektronik
Dauerhafte URI für die Sammlunghttps://irf.fhnw.ch/handle/11654/28068
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Publikation A tutorial to switched-capacitor noise analysis by hand(Springer, 2016) Schmid, Hanspeter; Eichelberger, Lothar; Huber, AlexanderThe methods for switched-capacitor (SC) noise analysis published up to this date fall in two groups: one group contains methods suitable for analysis by hand that are not easily applicable to all SC circuits. The other group contains methods that are applicable to all SC circuits, but require matrix manipulations with a computer algebra tool. In this paper, we show a universally applicable hand-analysis method. The main reason why SC noise analysis is so difficult is that noise is sampled on many different capacitors, and when being sampled, its spectrum is aliased. The core idea of making analysis by hand possible is to use an intuitive rather than an algebraic method to derive the continuous-time noise spectra in the different phases. Our method combines charge-equation analysis for the discrete-time aspects with signal-flow-graph analysis for the continuous-time aspects of a circuit. We show in tutorial style how to apply it, and demonstrate that it is very useful for getting insight into SC circuits, deriving simplified expressions, and getting a good correspondence with behavioural simulations using SpectreRF.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Analysis of switched-capacitor circuits using driving-point signal-flow graphs(Springer, 2018) Schmid, Hanspeter; Huber, AlexanderThis paper extends the driving-point signal-flow graphs to switched-capacitor (SC) circuits by introducing a new theoretical element: an auxiliary voltage source that transfers no charge. In contrast to existing SFG methods, our method has no restrictions as to what types of SC circuits can be analysed, it requires no equivalent circuits or tables, and it works with two-phase as well as multi-phase SC circuits of any complexity. Compared to charge-equation matrix methods, it requires more effort, but is better suited for hand analysis because it makes causal relationships visible. Three illustrative examples are given to show the efficiency of the method and present a few application hints: a voltage doubler, the standard SC integrator, and a four-phase circuit simulating an inductor.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation signalflowgrapher(2020) Schmid, HanspeterThe signalflowgrapher is a tool that allows you to draw signal-flow graphs, calculate transfer functions (SymPy code is generated for further use in Jupyter notebooks), do graph manipulations (e.g., node elimination and graph transposition), and save a graph as TikZ for use in LaTeX documentation.09 - SoftwarePublikation Wie stelle ich meine Signale elektronisch dar?(Swiss Professional Media, 2011) Schmid, Hanspeter; Huber, Alexander01B - Beitrag in Magazin oder ZeitungPublikation Why 'Current Mode' does not guarantee good performance(Springer, 2003) Schmid, Hanspeter01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Switched-Capacitor-Schaltungen -- elektronische Eimerketten(Swiss Professional Media, 2011) Schmid, Hanspeter01B - Beitrag in Magazin oder ZeitungPublikation The SKILL of doing cross sections through a layout(2010) Schmid, Hanspeter04B - Beitrag KonferenzschriftPublikation The 3 σ Fallacy: Measuring a Small Number of Samples(IEEE, 2014) Schmid, Hanspeter; Huber, Alexander01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Sigma-Delta-Wandler: nicht lineare gemischt analog/digitale Filter(Swiss Professional Media, 2012) Schmid, Hanspeter; Huber, Alexander01B - Beitrag in Magazin oder ZeitungPublikation Sigma-Delta-Wandler und ihre Macken(Swiss Professional Media, 2012) Schmid, Hanspeter; Huber, Alexander01B - Beitrag in Magazin oder Zeitung
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