92 • Reference Section
MultiClamp 700A Theory and Operation, Copyright 2000, 2001 Axon Instruments, Inc.
Figure 4.12. Voltage follower headstage.
Note that V
cmd
is limited to 10 V in the MultiClamp 700A, which in turn limits the
maximum amount of current that can be injected throught the headstage resistor into
the electrode. For example, with R
f
= 500 MΩ, the maximum current that can be
injected is 10 V/500 MΩ = 20 nA. These current limits are listed in the Options/Gains
panel of the MultiClamp Commander.
Mounting the Headstage
For maximum mechanical rigidity, the CV-7A headstage should be mounted directly to
the head of the micromanipulator using the dovetailed mounting plate.
Bath Connection
The bath (or ground) electrode should be connected to the gold-plated 1 mm plug on
the rear of the headstage. The bath should not contact any other ground (e.g. Signal
Ground).
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