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Circuits and Amplifiers (What is an amplifiers? (It is an electronic…

- - - - The amount that amplifiers increase a signal is called gain. Its unit of measure is Bel, but it's too large and we use decibels.
        
        Types of Amplifiers
        
        There are four general categories: voltage current, transresistence and transconductance
        
        Transistor amplifiers
        
        Transistor amplifiers are used for a Rf (radio frequency) or audio. The most familiar application is the audio amplifier, that amplifies low power to a level appropriate for driving loudspeakers.
        
        Effiency
        
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- - - - A series Circuit is where the current has only path trough which it can flow. A parallel circuit is type of circuit that provides more then one path for the current to flow trough, where two or more components are connected across the same voltage source.
        
        Active and passive components
        
        All components that supply electric power are called active components.
        All components that absorb or dissipate electric power are ca
        lled passive components