magnetic coil input to PIC
David VanHorn email (remove spam text)
>Do remember that whatever scheme you use, the low frequency bandwidth is
>better with a low impedance input. Having the pickup coil looking into the
>virtual ground input of an opamp is ideal, bandwith wise.
It kills self-resonance (by murdering the Q, usually a good thing) and
converts the op-amp from a voltage to a current amplifier.
Also, usually a good thing.
Dave's Engineering Page: http://www.dvanhorn.org
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In reply to: <3A907191.3ED209F7@idcomm.com>
See also: www.piclist.com/techref/microchip/ios.htm?key=input
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