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Electronics Devices Laboratory ECE 2300 Gregg · PDF fileECE 2300 Electronics Circuits and Electronics Devices Laboratory Gregg Chapman

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  • ECE 2300

    Electronics Circuits and

    Electronics Devices Laboratory

    Gregg Chapman

  • Laboratory 7Transistors

  • Background

    Bipolar Junction Transistors MOSFET Transistors

    Screencast: 0:10

  • Bipolar Junction Transistors

    Screencast: 0:20

  • MOSFET Transistors

    Screencast: 1:53

  • Circuits

    1. Constant Current Source

    2. Constant Current Sink

    3. MOSFET Power Switch

    Screencast: 3:17

  • Lab Supplies Resistors

    1 7.5 Ohm, 6.5 Watt (From Lab Monitors)

    1 150 Ohm

    1 499 Ohm

    2 20.0 KOhm

    1 100 Kohm

    Transistors 1 2N5088G

    1 2N5087G

    1 2N7000TA

    1 NTP2955G

    Screencast: 3:33

  • Lab Supplies Breadboard Digital-Multi-meter Power Supply Banana to Banana, black (1) Banana to Banana, red (1) Banana to Mini-grabber, black (2) Banana to Mini-grabber, red (2) Banana to Mini-grabber, green (1)

    Screencast: 4:00

  • Test Set-up 1

    Power Supply Program the +25V supply for +12 Volts Use the following banana to mini-grabber color codes

    Red: +12V Black: Ground

    Digital Multimeter Use banana to mini-grabbers ( Red, Black)

    Screencast: 4:21

  • Constant Current Source

    ConstantEuropean

    Symbol

    Controlled Current Source

    Screencast: 4:33

    http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=l3CkrtNJ5H8F6M&tbnid=xxHw2Hovo37vmM:&ved=0CAUQjRw&url=http://commons.wikimedia.org/wiki/File:Controlled_current_source_symbol.png&ei=vv7pUYGjIYLnswbT2IEw&bvm=bv.49478099,d.Yms&psig=AFQjCNGinSh1TATQvTO6RB8dphieLvbu5g&ust=1374375993282074http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=WCXg1h4bd5TQfM&tbnid=8m8LHxehTjCh4M:&ved=0CAUQjRw&url=http://lizarum.com/assignments/physical_computing/2009/symbols.html&ei=6_7pUfr2KcrptQbilIGgAg&bvm=bv.49478099,d.Yms&psig=AFQjCNH63E101aWL3W4O8-tkb0ExixxJuw&ust=1374376035660146http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=jhJHG2Hhsh4b9M&tbnid=tmMuRG8e8Q0HNM:&ved=0CAUQjRw&url=http://www.interfacebus.com/Glossary-of-Terms_C5.html&ei=JQDqUb7rIcWOtAbXh4G4Aw&bvm=bv.49478099,d.Yms&psig=AFQjCNE9HdR8i3oLpze_C8X_NMDN4OydDQ&ust=1374376147795505

  • Constant Current Source

    DMM goes here

    Screencast: 5:00

  • Transistor Pin-outs

    Screencast: 7:33

  • Constant Current Sink

    DMM goes here

    Screencast: 7:56

  • Transistor Pin-outs

    Screencast: 8:36

  • Calculations and Measurements Circuit 1 and 2 (BJTs)

    Using the base voltage and the emitter resistor, calculate the emitter current. Assume that V

    BE is 0.65 V.

    Measure collector currents

    CircuitCalculatedValue (mA)

    Measured Value (mA)

    NPN Current Sink

    Current Sink Results

    CircuitCalculatedValue (mA)

    Measured Value (mA)

    PNP Current Source

    Current Source Results

    Screencast: 8:48

  • Test Set-up 2

    Power Supply Connect the two black commons together using the black banana to banana cable Program the +6V supply for +5 Volts. Program the +25V supply for +12 Volts Use the following banana to mini-grabber color codes

    Red: +12V Black: Ground Green: +5V

    Digital Multimeter Use banana to mini-grabbers ( Red, Black)

    Screencast: 8:58

  • Screencast: 9:24

  • MOSFET Power Switch

    DMM goes here

    Screencast: 9:50

  • Transistor Pin-outs

    Screencast: 11:16

  • Transistor Pin-outs

    Screencast: 11:43

  • Measurements Circuits 1 & 2 ( Current source and sink)

    Measure collector currents

    Circuit 3 Measure source to drain current P channel fully on (N channel G at 5 V) Decrease N channel gate voltage and document the minimum on voltage for the circuit ( S-to-D current should be greater than 90% of full on value)

    Circuit Value

    P Channel S-to-D CurrentN Channel On Voltage

    MOSFET Power Switch

    Screencast: 11:56

  • Lab 7 Results

    Circuit Value

    P Channel S-to-D Current

    N Channel On Voltage

    MOSFET Power Switch

    CircuitModified Resistor

    Value (Top R in Base Voltage

    Divider)

    CalculatedVB

    CalculatedVE

    CalculatedValue (mA)

    Measured Value (mA)

    PNP Current Source

    CircuitModified Resistor

    Value (Bottom R in Base Voltage Divider)

    CalculatedVB

    CalculatedVE

    CalculatedValue (mA)

    Measured Value (mA)

    NPN Current Source

    Current Source Results (2nd Circuit in Demo, 1st in Screencast)

    Current Sink Results (1st Circuit in Demo, 2nd in Screencast)

    NTP2955 GDS

    2N7000 SGD

    2N5087 EBC

    2N5088 EBC

    ASSUME = 500

    Screencast: 12:40

  • Lab 7 Schematics

    MOSFET Power Switch

    DMM goes here

    NTP2955

    Constant Current Sink

    DMM goes here

    ConstantCurrent Source

    DMM goes here