impulse generator circuit design

Howdy. I'm looking for an electronic circuit design that accomplishes
the following: using a DC voltage source first charge a capacitor to
a certain voltage level and then (automatically) discharge that
capacitor through another circuit, then start charging the capacitor
again so the process keeps repeating. So basically I need a circuit
that turns a constant DC voltage source into a series of current
impulses (because I want both the cyclical nature of the impulse and
also a higher current in the impulses than I would be able to get from
just the DC power supply I'm using, which will probably be a
not-too-large battery). One more thing, I would like this circuit to
run at a reasonable high frequency (maybe 50-200 Hz) so I'd prefer not
to have any mechanical components such as relays in the circuit since
it seems like they could wear out easily under those conditions.

So, any help I can get with this would be appreciated. I'm actually an
electrical engineer, but in control theory, so while I'll be able to
understand a circuit diagram I haven't done any real circuit work in
ages. Thanks.

.

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