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Explain how transistor can be used as a switch ? |
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Answer» Solution :To understand the operation of transistor as a SWITCH. (i) As long as `V_(i) ` is low and unable to forwardbias the transistor , `v_(0)` is high ( at `V _(C C)`. (ii) If `V_(i)` is high enough to drivethe transistor into saturation then `V_(0)` is low, very nearto ZERO.  (iii) When the transistor is not conducting it is said to be switched off and when it is driven into saturation it is said to be switched on. (ii) We can say that a low INPUT to the transistorgives a high output and high input gives a low output. (v) When the transistor is used in CUTOFF ( or ) saturation state it acts as a switch.  |
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