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How NPN transistor works as an amplifier?
A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.
Is nothing but an amplifier with?
positive feedback
Hence the circuit continues its process without any input to the oscillator. The positive feedback is also known as regenerative feedback because the system sustains or regenerates itself without any input source. Hence the oscillator is nothing but an amplifier with the positive feedback.
How does a PNP transistor work?
PNP Transistor. A PNP transistor receives positive voltage at the emitter terminal. The positive voltage to the emitter allows current to flow from the emitter to the collector, given that there is negative current to the base (current flowing out of the base to ground).
What is a transistor amplifier circuit?
Transistor as an Amplifier Amplifier circuit can be defined as, a circuit which is used to amplify a signal . The input of the amplifier is a voltage otherwise current, where the output will be an amplifier input signal. An amplifier circuit which uses a transistor otherwise transistors is known as a transistor amplifier.
What is an example of a transistor?
The definition of a transistor is an electronic device that works by controlling the flow of the electrical current. An example of a transistor is something combined in large numbers with microcircuits into a single circuit board and used in a computer. YourDictionary definition and usage example. “Transistor.”.
What is the operation of a transistor?
Basic Operation. The central idea to the operation of a transistor is that a little bit of current flowing between the base and emitter causes a larger current to flow between the collector and emitter. A transistor is essentially an amplifier.