A transistor
is an active semiconductor device with three or more electrodes.By
active (подразумевается is meant) that the transistor is capable of current gain,
voltage amplification and power gain. A transistor is an electronic
device in which electronic conduction (производится is performed) within a
semiconductor. A semiconductor is an electric conductor with
resistivity in the range between metals and insulators, in which the
electrical charge carrier concentration (увеличивается grows) with increasing
temperature over some temperature range. The resistivitiys of
semiconductors and insulators (уменьшается falls) rapidly with rising
temperatures, while those of metals (увеличевается goes up) relatively slow.