Find reference designs with google (similar applications of a similar device to what you're trying to do).

I recently almost ordered a PCB that relied on a part central to it's design (an SMD antenna) which was not available anywhere I looked.

Make sure you can actually get the part you want to read up on.

As I've had to learn things quickly I've adopted this 'workflow': With Ig held at a single value, does the value of Beta significantly change as V, is increased? Why or Why not? How should it perform ideally? 2.I'm new to this as well. Label each line with the appropriate 13 value. Create a graph using excel for the data in Figure 8, plot V2 vs Ic for each Ig data set. Label each line with the appropriate IB value. Create a graph using excel for the data in Figure 6, plot V2 vs Ic for each Is data set. Within its operating range, what kind of source (voltage or current) does the transistor act like? How is it controlled? Explain.Īnalysis: This should look similar to the operating region of characteristic curves in your textbook on page 297 Figure 5.14 below: Forward-active mode sics to Slopes SECE PCE Figure 5.14 Current-voltage characteristics for the common-emitter circuit, showing the Early voltage and the finite output resistance, T, of the transistor 1. 40 A Figure 10: PNP Beta Calculation Data Principles of Operation: 1. 40 μΑ 4 Figure 9: PNP IC Data IB Ideal V2 = 3V V2 = 4V V2 = 5V V2 = 6V 10 μ. Repeat Step 4 and fill in Figure 9 and 10 XS C1 BTH XHM 1 XM 2 R1 01 2N3906 V2 3V 100k V1 17 Figure 8: PNP Test Reference Schematic IB Ideal IC Prework vi Vri Ів VBE (Scope) Ic V2 = 3V IC V2 = 4V Ic V2 = 5V Ic V2 = 6V 10 με 4 20 με 30 μ.

When taking measurements only the oscilloscope should read a negative value. Note all the changes in polarity on V, V, and the meters. Using a 2N3906 transistor, build the circuit in Figure 8. It is different from the circuit in Figure 5. 2) for all the combinations in the table in Figure 7 IB Ideal V2 = 3V V2 = 4V V2 = 5V V2 = 6V 10 με 20 4 30 4 40 μΑ A Figure 7: NPN Beta Calculation Data Using your data from Figure 6, calculate Beta (B) where, ß = 6 (eq. Repeat this for all the values of IB Is Ideal Vi VR1 IB VEE V2 = 3V V2 = 4V V2 = 5V V2 = 6V V, FSV 10 με 20 μΑ 30 μΑ A 40 A Figure 6: NPN Ic Data IC Prework IC Ic IC (Scope) 5. Adjust V2 to the next voltage level and record. Record - V1, Vri, IB Cale, VBE, and Ic 2 = 3V b. Set V1 so that IB Calc is # 2uA from IB Ideal, Set V2 = 3V a.

1, then adjust the voltage supply until the desired value of It is achieved. Use the power supply for V1, set the voltage to the value calculated using the formula in eq. (Ri X IB Ideal) + 0.7 V to approximate V (eq. XSCI Har The XML XML R1 Q1 2N3904 HOH V2 3V 100kn VI -1V Figure 5: NPN Test Reference Schematic a. If you burn up more than one BJT you will spin the Wheel of DOOM. add an RMS measurement to XMM1 – is set up as a current meter to measure Ic Note – It is very easy to destroy the BJT with no resistor between the Collector and V2. It should be DC coupled and Using the Temperature Indicator Module measuring the BE junction voltage drop. from this the base current can be calculated. XMM2 – is set up as a voltmeter and used to measure the voltage drop across Rı.Remember that there will be approximately a 0.7 V drop across the base-emitter junction. A current meter can't be used here because the loading effect of the meter increases the percent error in the micro-amp range. R1 acts as both a current sense and limiting resistor. Wiring the transistor terminals incorrectly can result in the destruction of the BJT. Ensure the Base, Emitter and Collector are identified and placed correctly. You do not need any oscilloscope screen shots for this lab. 2011 Q1 B 2N3906 E E Figure 3: PNP Forward Bias Base to Emitter Test Example Base/Collector Junction Base/Emitter Junction PNP Test Forward Bias Reverse Bias Figure 4: PNP Diode Test Results Part 2: In this next section of the experiment, it is important to take your time, follow the directions, and perform all the measurements correctly. Using the Diode Test on the DMM, test a 2N3906 PNP BJT and record the junction combinations of transistor listed in Figure 4.

Early voltage in 2n3906 transistor