Datasheet

LPC660
SNOS554D –MAY 1998–REVISED MARCH 2013 www.ti.com
Figure 29. (a) Inverting Amplifier
Figure 30. (b) Non-Inverting Amplifier
Figure 31. (c) Follower
Figure 32. (d) Howland Current Pump
The designer should be aware that when it is inappropriate to lay out a PC board for the sake of just a few
circuits, there is another technique which is even better than a guard ring on a PC board: Don't insert the
amplifier's input pin into the board at all, but bend it up in the air and use only air as an insulator. Air is an
excellent insulator. In this case you may have to forego some of the advantages of PC board construction, but
the advantages are sometimes well worth the effort of using point-to-point up-in-the-air wiring. See Figure 33.
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