Transcript Team #6: Transistor/Diode Curve Tracer

EE 318-595
Capstone Design Project
Spring 2005
Team #6: Transistor/Diode Curve Tracer
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Brian Gallert
John Edwards
Karl Silge
Transistor/Diode Curve Tracer
External Interfaces
PNP, NPN,
diode plug in
User input
settings
•Current Range
Curve Tracer
•Voltage Range
•Device Type
120 VAC
outlet
Oscilloscope
Transistor/Diode Curve Tracer
Internal Block Diagram of Curve Tracer
Digital Functions
microprocessor
User
Interface
John
Karl
Brian
Power Supply
Analog Functions
Current
Source
Signal
Processing
Transistor/Diode Curve Tracer
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Trace electrical characteristics for
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NPN
PNP
FETs
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Resistors
Diodes
JFET
MOSFET
User Interface for customized
analysis
User Interface
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BJTs
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Features
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Any two terminal device
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Select base current increment
Switch between two different devices
under test
Functions
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Collector Voltage sweep 0-30 VDC
 High range to view breakdown
characteristics
System – Performance Requirements
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User interface technology
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Toggle Switches
 Rotary dials
 BNC male coaxial cable to oscilloscope
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Operation modes
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ON/OFF
 Testing for:
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two terminal devices
three terminal devices
Safety
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Current limiting of 150 mA to user
 Fuse for instantaneous trip time
 Max potential of user surfaces of 30V
Signal Type
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Signal Direction
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Analog
Input
Basic Analog Characteristics
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120 VAC
 150mA
 60Hz
 25 W
System – Standard Requirements
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Min Operating Temp Range
Min Operating Humidity Range
Min Operating Alt or Press Range
Min Storage Temp Range
Min Storage Humidity Range
Min Storage Alt or Press Range
Max Storage Duration
10Co - 50Co
10 – 70 Rh%
Sea level – 4000m
10Co - 50Co
0 – 80 Rh%
Sea level – 4000m
3 Years
Energy Source List
Source Connection List
Min Operating Voltage Range
Max Power Consumption
Max Energy Consumption
120 VAC
Temporary
102V – 132V
25 Watts Total
7500 Watt-Hours/Yr
Max Volume
Max weight
Electrical I/F Connector(s)
Max # of PC Boards
Max PCB Circuit Area
10” x 8” x 3” = 240 in3
10 lbs
BNC connectors
5
80 in2