A field-effect transistor (whether junction type or MOS type) has very high input impedance. For those who desire to achieve a higher input impedance, it is often asked `Why aren't FET pairs used as input stages and bipolar transistors used as output stages, since compatible FET and bipolar transistor monolithic structures have been developed?' This correspondence is a study of this question.
Published in:
Solid-State Circuits, IEEE Journal of
(Volume:5
,
Issue:
3
)
Date of Publication: June 1970