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ET371 · Semiconductor Devices

Semiconductor Devices

A course package for the ET platform: a Diodes card, a Transistors card and a Thyristors card for the study of semiconductor components, all powered by the base system at safety extra-low voltage, with guided multimedia courseware.
Experiments
  • Basic principles of semiconductors and doping
  • Diodes in DC and AC circuits: forward and reverse characteristics of a silicon diode
  • Half-wave rectifier with a single diode, and bridge rectifier with a resistive load
  • Displaying diode characteristics on the oscilloscope in XY mode
  • LED forward characteristic
  • Zener diode breakdown characteristic
  • Diode-like characteristic of the transistor base-emitter junction
  • Input, output and control characteristics of an NPN bipolar transistor and its current gain
  • The bipolar transistor in common-emitter, common-collector and common-base circuits
  • The bipolar transistor as a switch
  • Basic principles of field-effect transistors
  • Input (transfer) and output characteristics of an N-channel JFET
  • Input (transfer) and output characteristics and threshold voltage of an N-channel enhancement MOSFET
  • Characteristics of diacs, thyristors and triacs
  • The thyristor (SCR) as a switch: triggering, latching and holding current
  • Thyristor (SCR) phase control of an AC load
  • Phase control of an AC load with a triac triggered by a diac
ET371 Diodes, Transistors and Thyristors experiment cards
Description
    The platform teaches the behaviour of semiconductor components through guided, hands-on experiments. The Diodes Card carries a silicon diode and a Zener diode, each with its own 1 kΩ series resistor, an LED with a 330 Ω series resistor, and a bridge rectifier with a 1 kΩ load. The Transistors Card carries an NPN bipolar transistor with base and collector resistors and a 1 kΩ emitter resistor on sockets, so that links set it up in common-emitter, common-collector or common-base configuration, and an N-channel JFET and an N-channel enhancement MOSFET with gate and drain resistors. The Thyristors Card carries a thyristor (SCR) with an LED in its anode circuit to show latching - with a link that adds a potentiometer and diode trigger path for phase control from 0 to 90° on AC - and a triac phase-control circuit with an RC phase-shift network and a low-voltage diac as the trigger. Every device has measuring sockets across it, so its currents follow from the voltages across the known resistors and its characteristic curves can be recorded with the ET300 oscilloscope and virtual instruments. The DC and AC supplies come from the ET300 base system.
Courseware
    The interactive multimedia course combines theory with guided experiments: semiconductor basics and doping, the PN junction, diode, Zener and LED characteristics, half-wave and bridge rectification, bipolar and field-effect transistor characteristics, switching, and four-layer devices with triggering, latching and phase-angle control of thyristors and triacs. Student answers are evaluated automatically, and the full course - at least 12 hours of directed instruction (4 hours per card) - includes self-assessment.
Scope of delivery
  • Diodes Card (silicon diode, Zener diode, LED, bridge rectifier)
  • Transistors Card (NPN bipolar transistor, N-channel JFET, N-channel MOSFET)
  • Thyristors Card (SCR with phase control, diac, triac phase control)
  • Storage case
  • Multimedia course software with course browser
  • Connection cables
Specifications
    Experiment cards Diodes Card, Transistors Card, Thyristors Card
    Devices Silicon diode, 5.1 V Zener diode, LED, bridge rectifier; NPN bipolar transistor, N-channel JFET, N-channel enhancement MOSFET; thyristor (SCR), low-voltage diac, triac
    Measuring points IN, VD, VZ, VF, AC, +, −; VB, VBE, VC, VCE, E, RE; VG, VGS, VD, VDS; VA, VAK, VG, VGK, phase-control link; L, N, VC, VT; GND
    Supply DC and AC from base system, safety extra-low voltage
    Measurement ET300 oscilloscope (including XY mode for characteristic curves) and virtual instruments
    Course duration Min. 12 hours of guided instruction, with self-assessment
    Base system Requires ET300 (interface + experimenter) - not included

Part of package

Electrical Engineering Training System

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A modular electrical-engineering training platform built around virtual instrumentation. The ET300 base system hosts a family of course modules covering three-phase systems, multimeter measurement, network analysis, and sensor measurement technology for non-electrical quantities.

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