15.1.2
Balanced differential input
A balanced differential input is not isolated and uses balanced inputs.
GND
U
in+
(–)
(+)
900 k
100 k
(+)
(–)
900 k
U
in–
U
diff
100 k
Figure 15.3:
Balanced differential amplifier
l
Resistance / Capacitance from each terminal to ground is identical
l
There is NO ISOLATION
l
Used in some of the GEN DAQ acquisition cards
l
Often identified by the use of two METAL BNC connectors per channel
l
Can be used with matched pair of probes only
l
Works with the same limitations as single probes, but is more tricky
due to the necessary
balance
between probes
l
The probes used need compensation. The compensation range needs to
match the input amplifier's capacitance range
GEN3i
I3763-3.1 en HBM: public
341
