Section 1
General Information
Troubleshooting 5-13
MN1230
Electrical Noise Considerations Continued
Using an R-C snubber and twisted-pair shielded cable keeps the voltage in a circuit to
less than 2 V for a fraction of a millisecond. Note that the vertical scale is 1 V/div., rather
than the 20 V/div. in figures 5-1 and 5-2.
Figure 5-3 R-C Snubber Circuit & twisted-pair
A reverse biased diode across a DC coil achieves the same result as adding an R–C
snubber across an AC coil, (Figure 5-4).
Figure 5-4 AC and DC Coil Noise Suppression
AC Coil
DC Coil
RC snubber
0.47
m
f
Diode
–
+
33
W
(1N4002)
Содержание 29M
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