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Advantages, disadvantages and application of FET over BJT Advantages 1.        FET gas high input impedance of several mega ohms. 2.        The noise produced by a FET is less than that produced by a BJT. 3.        FETs are less effect by radiation compared to BJT. 4.        FET has no offset voltage at zero drain current and hence it forms an excellent signal chopper. 5.        FETs are voltage controlled devices. 6.        FETs have better thermal stability. 7.        In the integrated circuit form FET is simpler to fabricate and it occupies less – space. Disadvantages FETs have a drawback of smaller gain bandwidth product compared to BJT. Applications The high input impedance and low output impedance and low noise level make FET for superior of the bipolar transistor. Some of t...

This is the simple Use NPD8301 Fet Amplifier Circuit Diagram. The excellent characteristics for the track NPD8301 over its range of bias current, thereby improving common mode rejection. The monolithic double NPD8301 offers an ideal low offset buffer function LM10lA low drift op amp. Use NPD8301 Fet Amplifier Circuit Diagram