Agilent Technologies B1500A Manual de Serviço Página 114

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2-28 Agilent B1500A/B1505A Programming Guide, Edition 11
Remote Mode Functions
Measurement Modes
The operation of the quasi-static CV measurements is explained below. This is the
case of start < stop.
1. Measurement trigger enables the sweep source output. The sweep source forces
1st step voltage-Vq, and waits for hold time. where Vq=cvoltage/2.
2. Repeats 3 and 4 for the Nth sweep step. where N is integer, 1 to step.
step is the number of sweep steps given by step = |start-stop| / |step voltage| -1.
3. The sweep source forces Nth step voltage-Vq, and waits for delay time (delay1).
4. The measurement unit measures the following items, and waits for delay time
(delay2).
IL
0
Leakage current before the voltage transition
V
0
Voltage before the voltage transition
I Charge current in the voltage transition to Nth step voltage+Vq
Vavg Averaging voltage in the voltage transition to Nth step voltage+Vq.
Not measured for the 4155C/4156C compatible operation mode set
by the QSC1 command.
IL Leakage current after the voltage transition
V Voltage after the voltage transition
5. After the sweep measurement, the sweep source forces the start or stop value, as
specified by the QSM command, and keeps it.
NOTE If the following condition is true, the measurement operation has the differences
shown below.
delay2 is automatically set to 0.
•V
0
and IL
0
are not measured for the second step and later. The capacitance
calculation uses the V and IL values at the previous sweep step, instead.
Condition:
|step voltage| = |start-stop| / (step + 1) = cvoltage
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