Schmid, Hanspeter

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Hanspeter
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Schmid, Hanspeter

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Publikation

signalflowgrapher

2020, Schmid, Hanspeter

The 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.

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Publikation

Two curious integrals and a graphic proof

2014-01, Schmid, Hanspeter

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Publikation

Sigma-Delta-Wandler und ihre Macken

2012, Schmid, Hanspeter, Huber, Alexander

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The Current-Mode Story -- How current-mode was created, how it changed, and how it is disappearing again

2011, Schmid, Hanspeter

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Publikation

A tutorial to switched-capacitor noise analysis by hand

2016, Schmid, Hanspeter, Eichelberger, Lothar, Huber, Alexander

The 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.

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Publikation

Measuring a Small Number of Samples, and the 3σ Fallacy. Shedding Light on Confidence and Error Intervals

2014, Schmid, Hanspeter, Huber, Alexander

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How to use the FFT and Matlab's pwelch function for signal and noise simulations and measurements

2012, Schmid, Hanspeter

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Publikation

The 3 σ Fallacy: Measuring a Small Number of Samples

2014, Schmid, Hanspeter, Huber, Alexander

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Publikation

Sigma-Delta-Wandler: nicht lineare gemischt analog/digitale Filter

2012, Schmid, Hanspeter, Huber, Alexander

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Publikation

Electrical and human feedback (invited paper)

2012, Schmid, Hanspeter