DEVICE CHARACTERIZATION WITHIN VIRTUAL LAB

USING LABVIEW

Supervisor : Prof. Joseph JohnDepartment of Electrical Engineering

Vaibhav Singh (Y4466) Vikas Kumar Sharma (Y4482)

OBJECTIVES

To perform the device characterization experiments using a computer interface.

To carry out characterization experiments from any remote computer on the network.

DEVICE CHARACTERIZATION Studying the characteristics of a device

Used in prediction of device behaviour in various circuit conditions

Helpful in circuit designing

VIRTUAL LAB

Conducting the experiment in Lab1. Circuit2. Power supply3. Function Generator/ Potentiometer4. Multimeter , CRO etc.

Using computer interface1. Circuit2. Power supply3. DAQ card4. LabVIEW

Remote access from another computer

ADVANTAGES OF VIRTUAL LAB

Can play with circuit parameters

Get real-time plots on the computer

Experiments can be done from anywhere

Educating large number of students

Cost savings

DEVICES USED

BJTo One of the most basic and extensively used

semiconductor device

JFETo Similar to MOSFET in characteristics.

EXPERIMENTAL SETUP

Computer

Device circuit

NI PCI DAQ card 6221

NI BNC 2120 connector

LM 324, LM 741 as Voltage follower

CD 4051 Analog Mux/Demux, HJR1-2C relay

Power Supply

CIRCUIT DIAGRAMS

BJT circuit JFET circuit

COMBINED CIRCUIT DIAGRAM

EQUATIONS

FRONT PANEL

BLOCK DIAGRAM

RESULTS - BJT

RESULTS – JFET

REMOTE COMMUNICATION

Host Computer

in Lab

A computer in Remote location

Device selection,Circuit

Parameters (Resistance values)

Results and Graphs

REMOTE COMMUNICATION

DSTP (Data Socket Transfer Protocol)

Web Publishing Tool

ADVANTAGES OF WEB PUBLISHING TOOL OVER DSTP

DSTP requires IP address of the user who wants to communicate.

DSTP use UDP while Web Publishing Tool uses TCP/IP.

Web Publishing Tool does not require full installation of LabVIEW and it can be accessed through web browsers as it uses http.

FUTURE WORK

Other devices like MOSFET, medium power transistor can be used in project with small modifications.

Other experiments can be implemented in the same manner.

THANK YOU

QUESTIONS???