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Jim Thompson[_3_] Jim Thompson[_3_] is offline
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Default Oscillator Proposal

On Sat, 14 Mar 2015 13:36:39 -0400, Phil Hobbs
wrote:

On 3/14/2015 1:07 PM, Jim Thompson wrote:
Oscillator Proposal...

Suppose I have a series RLC, one end grounded, the other end driven by
a chip, how might I make that into an oscillator?

All wild ideas accepted... this is for a custom chip.

...Jim Thompson


Series RLC is harder than parallel, because to leading order there's no
signal on the pin at resonance. (If it were parallel, you could do a
single-ended version of the MC1648, which you may have heard of.)


Gee! That part number sure sounds familiar ;-)


You need to arrange a negative resistance at the pin, which isn't hard
to do, and use the AC current to drive the next stage.

Cheers

Phil Hobbs


I was fretting over not wanting a DC path to ground, but maybe that
can be minimized.

...Jim Thompson
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