Agilent Technologies 16440A Bedienungsanleitung PDF herunterladen (Seite 6)

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VAR2

Subordinate linear staircase or linear

pulsed sweep. After primary sweep is

completed, the VAR2 unit output is

incremented.

Maximum number of steps: 128

CONSTANT

A source unit can be set as a constant

voltage or current source depending on

the unit.

PULSE

One of the SMUs can be set as a pulse

source.

Pulse width: 0.5ms to 100ms, 100µs

resolution.

Pulse period:

(5ms to 1s (≥ pulse width + 4ms),

100µs resolution.

SMU pulse setting accuracy

(supplemental information, at fixed range

measurement except multi- channel

measurement):

Width: 0.5% + 50µs

Period: 0.5% + 100µs

Trigger output delay for pulsed

measurement: 0 - 32.7ms with 100µs

resolution (< pulse width).

Sampling (Time Domain)

Measurement Characteristics

Displays the time sampled voltage/

current data versus time.

Maximum sampling points: 10,001

(linear)

Sampling mode: linear, log, and

thinned-out

Note: The thinned-out mode is similar to

reverse-log sampling. Sampling

measurement continues by thinning out

older data until the sampling completion

condition is satisfied.

Sampling interval range and resolution:

Linear scale (auto mode):

60µs to 480µs range: 20µs resolution

480µs to 1s range: 80µs resolution

1s to 65.535s range: 2ms resolution

Measurement Set-up

Setting

Fill-in-the-blanks using front-panel or

full-size external keyboard

Load settings from floppy disk or via

the LAN port

Program using internal Instrument

BASIC or via GPIB

HELP Function

Library: Default measure setup, Vce-Ic,

Vds-Id, Vgs-Id, and Vf-If are pre-

defined softkeys

User-defined measurement setup

library

Auto file load function on power-up

Measurement

The 4155C and 4156C can

perform dc or pulsed force/measure,

and stress force. For dc,

voltage/current sweep and sampling

(time domain) measurements are

available.

Voltage/Current Sweep

Measurement Characteristics

Each SMU and VSU can sweep using

VAR1 (primary sweep), VAR2

(subordinate sweep), or VAR1

(synchronous sweep).

VAR1

Primary sweep controls the staircase (dc

or pulsed) voltage or current sweep.

Maximum number of steps: 1001 for one

VAR1 sweep.

Sweep type: linear or logarithmic

Sweep direction: Single or double sweep

Hold time:

Initial wait time or wait time after

VAR2 is set: 0 to 655.35s with 10ms

resolution

Delay time:

Wait time from VAR1 step to the start

of the measurement: 0 to 65.535s with

100 µs resolution

Functions

VAR1

Staircase or pulse sweep synchronized

with the VAR1 sweep. Sweep is made

with a user specified ratio and offset

value. VAR1

output is calculated as

VAR1

= a × VAR1 + b, where “a” is the

user specified ratio and “b” is the user

specified offset value.

Linear scale (no limit mode), log

scale, and thinned-out modes:

560µs (720µs at thinned-out mode)

to 1s range:

80µs resolution

1s to 65.535s range:

2ms resolution

Note: The following conditions must be set

when initial interval is less than

2ms.

umber of measurement channels: 1

Measurement ranging: fixed range

Stop conditi

: disable

Hold time:

Initial wait rime: 0.03s to 655.35s,

100µs resolution

Sampling measurement stop condition:

A condition to stop the sampling can

be defined.

Sampling interval setting accuracy

(supplemental data):

0.5% + 10µs (sampling interval ≤

480µs)

0.5% + 10µs (480µs ≤ sampling

interval <2ms)

0.5% + 100µs (2ms ≤ sampling

interval)

C-V Measurement

Characteristics

Capacitance is calculated value

derived from the following

equation:

C =

dQ is the charge when dV, the step

voltage, is applied by the SMU;

dQ is derived from the measure-

ment current (amps) and the

integration time (seconds).

Measurement Range:

Measurement range depends on the

current range, integration time, and

step voltage (refer to the chart in

supplemental data).

Capacitance Calculation Accuracy:

Accuracy is dependent on accuracy of the

current measurement and voltage measure-

ment, and the stray capacitance and

leakage current of measurement system etc

(Refer to the chart in supplemental data).

Zero Offset:

Cancels stray capacitance of the fixtures

and test leads.

Leakage Current Compensation:

Cancels the influence of the leakage cur-

rent to the capacitance measurement.

SMU, VSU, and PGU output can be

forced for the user specified period.

Stress time set range:

5000µs to 31,536,000s (365 days)

Resolution:

100µs (500µs≤stress time≤10s)

10ms (10s<stress time≤31,536,000s)

Burst pulse count:

1 - 65,535 (PGU only)

Trigger:

The 4155C and 4156C output a gate

trigger while stress channels are

forcing stress.

Stress Force Characteristics

1 2 3 4 5 6 7 8 9 10

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