Keithley 2651A Reference Manual

Section 4: Theory of operation Model 2651A High Power System SourceMeter® Instrument Reference Manual
4-8 2651A-901-01 Rev. A / March 2011
Figure 72: Model 2651A I-source load considerations
V-meter
(V
M
)
5 V
10 V
100 mA
A: Normal I-source operation
Programmed source value:
100 mA
Actual source value:
100 mA
V
V
10
10
10
0
0
0
mA
I-source
(I
S
)
Voltage
compliance
limit line
Voltage
compliance
limit line
Voltage
compliance
limit line
Power
compliance
limit line
Programmed current
source value line
Programmed current
source value line
Operating
point
5
0
Ω
DUT
Loa
d
Line (R
)
V-meter
(V
M
)
5 V
10 V
100 mA50 mA
B: I-source operation in voltage compliance
Programmed source value:
100 mA
Actual source value:
50 mA
C: I-source operation in power compliance
Programmed source value:
100 mA
Actual source value:
30 mA
I-source
(I
S
)
Operating
point
2
00
Ω
DU
T
Load L
i
ne (R)
V
M
= I
S
• R
= (100 mA) (50 Ω)
= 5 V
I
S
= V
M
/ R
= 10 V / 200 Ω
= 50 mA
Programmed current
source value line
V-meter
(V
M
)
5 V
10 V
100 mA
50 mA
I-source
(I
S
)
Power limited
voltage compliance
limit line
Operating
point
I
S
= V
M
/ R
= 6 V / 200 Ω
= 30 mA
t
Power
compliance
limit line
U
T
o
a
n
R
)
2
00
Ω
DU
T
Load L
i
ne (R)
X

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English