FET transistor is a transistor that works based on the electric field effect produced by the applied voltage on both ends of the terminal. Mechanism of action of the transistor is different from the transistor BJT. In this transistor, current generated / controlled from the Drain (analogy with the collector in a BJT), performed by the voltage between Gate and Source (analogy with the base and emitter of BJT). Compare this with the current on Base to use to produce collector current in transistor BJT. So, it can be said that the FET is a transistor that serves as a "converter" to the current voltage.
Transistor FET has several families, namely JFET and MOSFET. In this lab will use MOSFET transistors although the general characteristics of JFET and MOSFET are similar.
General characteristics of the MOSFET transistor can be described in a curve which is divided into two, namely the characteristic curve ID vs VGA and ID vs. VDS characteristic curve. ID vs VGA characteristic curve shown in the figure below. In the figure it can be seen that there is a minimum VGA causing currents begin to flow. The voltage is called the threshold voltage, Vt.. In the depletion type MOSFET, Vt is negative, whereas in type enhancement, Vt. is positive.
FET in the doc file. Download Here
Transistor FET has several families, namely JFET and MOSFET. In this lab will use MOSFET transistors although the general characteristics of JFET and MOSFET are similar.
General characteristics of the MOSFET transistor can be described in a curve which is divided into two, namely the characteristic curve ID vs VGA and ID vs. VDS characteristic curve. ID vs VGA characteristic curve shown in the figure below. In the figure it can be seen that there is a minimum VGA causing currents begin to flow. The voltage is called the threshold voltage, Vt.. In the depletion type MOSFET, Vt is negative, whereas in type enhancement, Vt. is positive.
FET in the doc file. Download Here
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