| 31. | They are useful in amplifiers because the currents at the emitter and collector are controllable by a relatively small base current.
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| 32. | Importantly, the large flow varied proportionally in relation to the size of the small base current, allowing all kinds of amplification.
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| 33. | In active mode, the ratio of the collector current to the base current is called the " DC current gain ".
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| 34. | In a BJT circuit, the BJT has a different current-voltage ( I C-V CE ) characteristic depending on the base current.
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| 35. | Placing a series of these curves on the graph shows how the base current will affect the operating point of the circuit.
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| 36. | In the example light-switch circuit shown, the resistor is chosen to provide enough base current to ensure the transistor will be saturated.
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| 37. | A lower base-resistor voltage drop reduces the base current, which results in less collector current because I c = ? I B.
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| 38. | First Aid, which sells for about $ 35, also will update itself via the Internet, so you can keep its knowledge base current.
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| 39. | It is possible to connect a floating source between the two bases, but it is necessary to ensure paths for the biasing base currents.
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| 40. | In this region, I c = ?I b where Ic is collector current and Ib is base current, following linear relation y = mx.
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