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Old 19th November 2005, 05:58 PM   #1
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Default transformer input with mosfet

i want to connect a 10k:10K input transformer to a mosfet source follower.

I also want to have adj bias for the mosfet and volume control.

how do i do this?

the left of the diagram is input and the secondary of right transformer is output.

how do i bias the mosfet?
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Old 19th November 2005, 11:04 PM   #2
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First ask yourself some questions:

- have you looked around for other transformer input circuits for ideas?

- how do they handle "bias"?

- why the Mosfet? Why not an opamp?

- how do they handle "volume controls"?

- why do you want to use a 1:1 transformer and a follower to drive a speaker? What do you think the power output will be? (hint: there's no voltage gain in this circuit)

- have you looked around for circuits that drive an ouput transformer?

- do you know that most transformers are not designed to have a DC current flowing in one direction (single-ended)?

- do you want or need a DC coupled circuit?

And most importantly, what are you trying to accomplish?

You can find the answers to these questions online, and by finding certain books. I happen to like the Horowitz & Hill book a lot, The Art Of Electronics - it will answer many of your questions.

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