题目内容
A transformer is an electrical component that converts AC electricity from one voltage to another with little loss of power. The input coil is called the primary winding and the output coil is called the secondary winding.
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A transistor is a semiconductor device used to amplify electronic signals. The transistor amplifies current, and the amount of current amplification is called the current gain.
A bipolar junction transistor ( BJT ) has terminals labeled base, collector, and emitter. For a field-effect transistor ( FET ) , the terminals are labeled gate , source, and drain, and a voltage at the gate can control a current between source and drain.
A diode is a two-terminal semiconductor device that consists of a PN junction made of semiconductor material.
An integrated circuit ( IC ) , sometimes called a silicon chip or chip, is a semiconductor wafer on which thousands or millions of tiny resistors, capacitors, and transistors are fabricated.
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