Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Output stages inside a negative feedback loop: application to a
  low-voltage three-phase DC-AC converter for educational purposes   The circuit presented in this paper aims at providing three 40 Vpp 50Hz AC
voltages sources with 120-degree phase separation between them. This is a fully
analogue circuit that uses standard, low-cost electronic components without
resorting to a microcontroller as previously proposed by Shirvasar et al [1].
This circuit may serve as a basis for a low-voltage 3P-AC power supply that
students may safely use to realize experiments, i.e. about the principles and
applications of three-phase AC power lines, without the risk of electric
shocks.

20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph