Variable blower control, that uses MOS field effect transistor, is adopted for front blower motor speed control.
 Courtesy of NISSAN NORTH AMERICA, INC.
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NOTE:
MOS field effect transistor is a transistor for which the gate portion is composed of a metal electrode on an oxide layer of semiconductor. Field effect transistor is controlled by voltage, while ordinary transistor is controlled by current. Electrode of field effect transistor is called source, drain, or gate, while electrode of ordinary transistor is called emitter, collector, or base.