Advantech PCI-1710 Manual de usuario Pagina 26

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 64
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 25
22 PCI-1710/1710HG User's Manual
Figure 3-4: Differential input channel connection - floating signal source
However, this connection has the disadvantage of loading the source
down with the series combination (sum) of the two resistors. For r
a
and r
b,
for example, if the input impedance r
s
is 1 k, and each of the
two resistors is 100 k, then the resistors load down the signal source
with 200 k (100 k + 100 k), resulting in a –0.5% gain error. The
following gives a simplified representation of the circuit and calculat-
ing process.
r
a
r
b
ExternalInternal
Vista de pagina 25
1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 63 64

Comentarios a estos manuales

Sin comentarios