Section 4: Multi-frequency capacitance-voltage unit
Model 4200A-SCS Parameter Analyzer Reference Manual
4-4
4200A-901-01 Rev. C / February 2017
The next figure shows an example of a frequency sweep. You specify the start frequency and the
stop frequency. The CVU calculates the number of measure points.
Figure 79: Frequency sweep (example)
If you are setting up a voltage list sweep, you specify the voltage levels for the sweep.
If you are setting up a step frequency sweep, the sweep includes voltage stepping. A voltage sweep
is performed for every frequency point.
Refer to
(on page 6-47) for details on the bias and sweep functions.
Force-measure timing
Timing diagrams for the force-measure process for bias and sweep functions are shown in the next
two topics.
Bias function timing
You can apply DC voltage bias to the DUT (±30 V).
Timing for the force-measure process for a bias function is shown in the next figure. When the test is
started, the following timing sequence takes place:
1. The DC source outputs the presoak voltage for the hold time.
2. The DC source goes to the DC bias voltage.
3. After the built-in system delay and time intervals, the 4210-CVU makes a measurement. The AC
test signal is applied just before the start of the measurement. The AC drive is turned off after the
measurement is completed. This step is repeated for every measurement.
Figure 80: Force-measure timing
