FIELD EFFECT TRANSISTOR
\fˈiːld ɪfˈɛkt tɹanzˈɪstə], \fˈiːld ɪfˈɛkt tɹanzˈɪstə], \f_ˈiː_l_d ɪ_f_ˈɛ_k_t t_ɹ_a_n_z_ˈɪ_s_t_ə]\
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(FET) A transistor with a region of donormaterial with two terminals called the "source" and the"drain", and an adjoining region of acceptor materialbetween, called the "gate". The voltage between the gate andthe substrate controls the current flow between source anddrain by depleting the donor region of its charge carriers togreater or lesser extent.There are two kinds of FET's, Junction FETs and MOSFETs.Because no current (except a minute leakage current) flowsthrough the gate, FETs can be used to make circuits with verylow power consumption.Contrast bipolar transistor.
By Denis Howe
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