Elmo DBP SERIES 用户手册

101

DBP - Rev 6/93

The differential amplifier is provided for your optional use. It can be used

for buffering, inverting or elimination of common mode signals.

The differential amplifier inputs are available at terminals H/R-9b,E-J3/1,

H/R-10b,E-J3/2. Terminal H/R-10b,E-J3/2 is the inverting input, terminal H/R-

9b,E-J3/1 is the non-inverting input. The output is on terminal H/R-11b,E-J3/3.

The differential amplifier can be internally connected to the summing junction

by inserting R800.

The differential amplifier may be used as a buffer or as an eliminator of

common mode signals. For a non-inverting buffer amplifier, connect the positive

signal lead to terminal H/R-9b,E-J3/1 and the negative signal lead to terminal

H/R-10b,E-J3/2, and connect terminal H/R-10b,E-J3/2 to the circuit common. For

an inverting buffer amplifier, connect the positive signal lead to terminal

H/R-10b,E-J3/2, the negative signal lead to terminal H/R-9b,E-J3/1, and connect

terminal H/R-9b,E-J3/1 to the circuit common. The output of the differential

amplifier is given by:

       10xV1              10        10xV 2

Vo = ----------- x ( 1 + --- )  -  -------

      10 + R3             R2          R2

V1 - Input voltage of terminal H/R-9b,E-J3/1.

V2 - Input voltage of terminal H/R-10b,E-J3/2.

V1max < 10 + R3;            V2max < 100/R2