User`s guide

4-20 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Quasi-static C-V Measurements
Making a Measurement
Step 4. Set up the source parameters
Set the output parameters on the MEASURE: QSCV SETUP screen. Define the
source parameters as shown below:
NOTE In the QSCV measurement, the 4155C/4156C executes the capacitance
measurement at the sweep steps except for the sweep start voltage and stop voltage.
At each sweep step, the capacitance measurement is executed over the voltage
range: output voltage ± capacitance measurement voltage/2.
1. Press the
Meas front-panel key. The MEASURE: QSCV SETUP screen appears.
2. Set the VARIABLE table. The following values are just an example.
The SWEEP MODE field selects the sweep mode: SINGLE or DOUBLE.
START, STOP, and STEP mean the sweep start, stop, and step values. The
minimum STEP value is double the resolution of the output range of the source
unit.
3. Set the QSCV MEAS VOLTAGE field. The following value is just an example.
This field specifies the capacitance measurement voltage in each sweep step.
The value must be less than or equal to the |STEP| value. If you set the value
greater than the |STEP| value, this value is automatically set to the same value as
the |STEP| value.
If you set the value greater than the |START − STOP| value, NO OF STEP is
automatically set to 1, and the QSCV MEAS VOLTAGE and STEP values are
ignored. Then the 4155C/4156C executes one-point spot measurement from
START to STOP.
SWEEP MODE SINGLE
START 3.1 V
STOP − 3.1 V
STEP − 100 mV
COMPLIANCE 100 mA
QSCV MEAS VOLTAGE 80 mV