Hi all,

    A darlington amifier is not designed for AF amplification due to the temperature drift which shifts the bias. Sometimes the power stages of an amplifier use darlington transistors in a very controlled way by using strong DC feedback.

    It’s preferable to use a feedback amplifier stage as the ones I proposed in this forum.

    A second disadvantage of the darlington is the uncontrolled gain.

    A better solution is to use a very high gain transistor such as the MPS-A18 or the BC549C both having a Hfe gain of 500 when a single transistor stage is preferred.


    • This reply was modified 4 years, 4 months ago by LectronFan.