Transistor amplifier lab report8/5/2023 ![]() ![]() ![]() Task 4: Connect the photo-transistor with the same supply voltages as used for task 1, but leave the base unconnected and connect the emitter straight to VEE. Discuss your measured gain with the TA again. Put a 25 mV, 1 kHz signal into the input as in task 1. Use VEE = 0 and VCC = −12 V, and design your biasing in the block diagram below so that VC = (−6 ± 1) V and IC = (−1 ± 0.2) mA. ![]() Task 3: Now switch over to the 2N4403 pnp-transistor, as on the right side of figure 1. What is the input impedance of your circuit? Task 2: Increase the source resistance of your 25 mV source to the point that the output amplitude of your circuit is halved. Remember: Your circuit must be designed such that it does not depend on the specific transistor that you chose if the TA replaces the transistor with another one of the same make, it should not change the behavior of your circuit! How do you determine what capacitance to choose? Discuss with the TAwhether the measured gain is reasonable. You will need to go through a capacitor in order not to disturb your transistor biasing. Task 1: Put a 25 mV, 1 kHz signal into the input andmeasure the voltage gain. Document how you chose that resistor value and the biasing circuitry that will replace your circuit blocks in the diagram. They use their observations to describe the behavior of a transistor. One of the most common uses of the MOSFET in analog circuits is the construction of differential amplifiers. Therefore the amplifier dissipates power only when it is being used to amplify signal (input signal present). Students investigate the properties of a transistor with current and voltage sensors. MOSFET DIFFERENTIAL AMPLIFIER (TWO-WEEK LAB) BACKGROUND The MOSFET is by far the most widely used transistor in both digital and analog circuits, and it is the backbone of modern electronics. Choose the collector resistor R such that VC = (6 ± 1) V and IC = (1.0 ±Ġ.2) mA. Class AB Class B Fig.(1): Signal waveform for Classes (A, AB, C, D) Class C In class B operation, exactly half of the input signal appears amplified at the output. In the block diagram (left side of figure 1) below, use VCC = +12 V, and VEE = 0. Get the data sheets for your 2N4401 and 2N4403 transistors. ![]()
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