J: Variable Collector Supply to minimum % (full ccw)Ī: Position the Left/Right switch as appropriateī: Press Offset Aid until the specified IB is appliedĬ: Slowly increase the Variable Collector Supply % until the specified IC is reachedĬheck that at the specified IC, VC is less than or equal to the specified maximum. Measure the forward and reverse resistance of the collector-base junction inPNP and. I: Offset/Step Amplitude to one increment below the specified base drive The test circuit can be made with just a couple of resistors and a switch, as shown in figure 2-18. Pin configuration, Collector, base, emitter. The specification is met when, at the specified base drive and IC, VC at the “knee” of the curve is less than or equal to the specified maximum.Ī: Max Peak Volts to the lowest setting above the specified VCī: Max Peak Power Watts to the lowest range that will satisfy (IC x VC)Ĭ: Horizontal Volts/Div to display specified VC between the 5th and 10th horizontal divisionsĭ: Vertical Current/Div to display the specified IC between the 5th and 10th vertical divisionsĮ: Collector Supply Polarity to (+DC) for NPN or (-DC) for PNPį: Configuration to (Base/Step Gen, Emitter/Common) A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and. The curve will then flatten out as the base drive assumes control. Select an NPN and a PNP transistor pair such as the 2N3904 and the 2N3906. A wrongly connected transistor will be damaged instantly. The three leads which must be connected correctly in any circuit before switching on any power supplies. Bipolar transistors has 3 pins, The Emitter(E), Base (B) and the Collector (C) which is usually connected to the casing for most Power transistors (TO-3 casing). With base drive applied, the curve will initially rise as IC is a function of VC. The leads are labelled base (B), collector (C) and emitter (E). In this video tutorial we will guide you to identify the Emitter, Base, and Collector of the transistor using Multimeter. It also does not matter which terminals are base, collector, and emitter. The display shows VC on the horizontal axis, and the resulting IC on the vertical axis. Testing a bipolar junction transistor is a diagnostic methodology used in the. Forward bias is applied by the Step Generator, and IC is sensed at the collector terminal. On the curve tracer, VC is applied by the Collector Supply. The measurement is taken with specified values of IC and IB. Collector-Emitter Saturation Voltage - VCE(sat)Ĭollector-emitter saturation voltage is the VC below which an increase in IB does not cause an increase in IC. BC547 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin.

Test transistor base emitter collector