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| ==Under Progress==
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| ==Bipolar Junction Transistor==
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| * An npn BJT has two layers of n-type material, known as the collector and emitter, and in between a layer of p-type material, known as the base.
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| * In order for a BJT to have a good performance, the base current needs to be small compared to the collector current.
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| <math>\beta=i_C/i_D</math>
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| *Operation in the active region:
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| *The base-emitter junction is forward biased.
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| *The base-collector junction is reverse biased.
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| *As amplifiers, BJTs operate in the active region.
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| *As switches, BJTs operate in saturation and cutoff.
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| Steps to analyze large signal dc models for BJT
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| 1. Assume an operating region for the BJT like saturation, cutoff or active.
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| 2. Solve the circuit to find <math>I_C, I_D, and V_CE</math>
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| 3. Check to see if the values found in Step 2 are consistent with the assumed operating state. If so the solution is complete; otherwise return to Step 1.
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