marine transducer driver

Hi,

I have been looking for a circuit design for driving a transducer such as the ones found in fish finders. I have a 200khz transducer.

I have read somewhere that these are piezo based and are a "capacitive" load. What would be the precautions I should use? I am assuming this means it would not handle dc well and the driver output would have to match this somehow.

Any thoughts, circuits or links would be great.

BTW: I searched google and got some references to an obsolete chip: LM1812 but oly with skimpy details and nothing newer or more in depth.

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