Axon Axopatch 200B User Manual

96
•
PRINCIPLES OF OPERATION
Axopatch 200B, Copyright 1997-1999, Axon Instruments, Inc.
BW =1 kHz
SERIES RESISTANCE
(
ohms
)
10 k
1 k100
0.1
10
300 pF
200 pF
100 pF
MEMBRANE
CAPACITANCE
TOTAL NOISE
1
Figure 22.
Typical current noise in bilayer experiments.
Current and Voltage Conventions
The terminology used in this discussion applies to all amplifiers manufactured by Axon
Instruments.
Positive Current
The flow of positive ions out of the headstage into the microelectrode and out of
the microelectrode tip into the preparation is termed positive current.
Inward Current
Current that flows across the membrane, from the outside surface to the inside
surface, is termed inward current.
Outward Current
Current that flows across the membrane, from the inside surface to the outside
surface, is termed outward current.

Axon Axopatch 200B Specifications

General

Brand	Axon
Model	Axopatch 200B
Category	Industrial Equipment
Language	English