Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Method for Reducing the Adverse Effects of Stray-Capacitance on
  Capacitive Sensor Circuits   We examine the increase in voltage noise in capacitive sensor circuits due to
the stray-capacitance introduced by connecting cables. We have measured and
modelled the voltage noise of various standard circuits, and we compare their
performance against a benchmark without stray-capacitance that is optimised to
have a high signal-to-noise ratio (SNR) for our application. We show that a
factor limiting sensitivity is the so-called noise gain, which is not easily
avoided. In our application the capacitive sensor is located in a metallic
vessel and is therefore shielded to some extent from ambient noise at radio
frequencies. It is therefore possible to compromise the shielding of the
coaxial connecting cable by effectively electrically floating it. With a cable
stray-capacitance of 1.8nF and at a modulation frequency of 100kHz, our circuit
has an output voltage noise a factor of 3 larger than the benchmark.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: nlin