The noise produced by a resistor is to be amplified by a noiseless amplifier having a voltage gain of 75 and a bandwidth of 100 kHz. A meter connected to the output of the amplifier reads 240 μV RMS. Assuming operation at 37°C, calculate the resistor’s resistance. In the previous problem, if the bandwidth were cut to 25 kHz, determine the expected output meter reading.     A. 240 μV    B.  60 μV    C. 120 μV     D. 75 μV

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Unijunction Transistor (UJT)

The Unijunction Transistor (UJT) is a three-terminal switching semiconductor device. It contains an n-shaped silicone object bar with a terminal attached to its two ends known as base one and base two. The third terminal is connected to a highly enclosed p-type material attached to the bar section of its length and is known as emitter. As there is only one corrective cross within the device, it is therefore called the 'Unijunction' transistor. The characteristics of the single junction transistor show the wrong resistance if it finds use in resting oscillator circuits for various applications.