Need help with transistor for capacitance multiplier

Jeffrey Wagner's picture

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Joined: Oct 13, 2020

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Need help with transistor for capacitance multiplier
October 13, 2020 - 2:37am

 I am designing a headphone amplifier ( I have built many but this is my first design). I want to use a capacitance multiplier in the power supply but need help sizing the transistor. I need 190VDC out of the supply and the amp will use approx 200ma. I will probably go with a darlington arrangement to get more gain out of it but I need help understanding how to size it. What specs am I looking for etc? I am trying to learn how to do it not just looking for an answer.

 Thanks

 

Jeff

Sourav Gupta's picture

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Michal Podmanický's picture

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Joined: Nov 06, 2020

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I didnt a headphones required 190V (maybe I am wrong)

You didnt mention your original supply voltage.

Anyway, for 20mA is better to use some of  DC/DC converter.

Michal Podmanický's picture

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I didnt see a headphones required 190V.