ocr: AMPLIFIER N. AMPLIFIER turns the weak electrical signal LOUDSPEAKER Afrom - a microphone into a current powertul - - - enough to drive a loudspeaker. A component called a transistor uses the weak input signal to control a large current from a power supply. In this example, there is one transistor. Real amplifiers use several transistors to control volume, POWER SUPPLY tone, and sound quality. o ) o %00 0%08 - - o o COLLECTOR talus so - EMITTER, TRANSISTOR FREE FREE - MICROPHONE - - - ELECTRONS OELECTRONSE - - 0 - le - ) or : 0000 o 0 - - 0000 O ) HOLES- - BASE SEE ALSO à -
(.png)
