Overview of the use of field-effect transistor amplifiers 3

(1) Field effect transistor is a voltage control element, while transistor is a current control element. Field effect transistors should be used when only a small amount of current is allowed to be drawn from the signal source; When the signal voltage is low and more current is allowed to be drawn from the signal source, transistors should be selected.transistor

(2) Field effect transistor (FET) is a unipolar device that utilizes majority charge carriers to conduct electricity, while transistor utilizes both majority and minority charge carriers to conduct electricity. It is called a bipolar device.

(3) Some field-effect transistors have interchangeable source and drain electrodes, and their gate voltages can be positive or negative, making them more flexible than transistor.

(4) Field effect transistors can operate under very low current and voltage conditions, and their manufacturing process can easily integrate many field effect transistors on a single silicon wafer. Therefore, field effect transistors have been widely used in large-scale integrated circuits.transistor

Photo 2: Circular iron core after winding