PLAN B analog blog

Hi Peter,

On the RC filter, could you explain why you need to ground it?  This
diagram doesn't have anything going to ground:
http://en.wikipedia.org/wiki/RC_filter

Thanks,
Monroe

On Mon, Dec 22, 2008 at 12:11 AM, (i think you can figure that out)
<peter@buzzclick-music.com> wrote:
> Stick a resistor in series, about a 20K and a 022mf cap to ground
> after that resistor. Start with that and see where that takes you. A
> standard r/c time contant, totally passive. To calculate the length
> of the slew it's R (resistance in ohms) x C (capacitance in farads) =
> Time (in seconds).
>
> hope this helps.
>
> - P
>
> --- In PLAN_B_analog_blog@yahoogroups.com, Monroe Eskew
>
> <monroe.eskew@...> wrote:
>>
>> >
>> > Is it possible to build a passive circuit that will round off the
>> > edges of a gate signal? I'm not worried about much control over the
>> > slope, I just want to smooth it off a bit, and hopefully not have to
>> > supply extra power in order to do this.
>>
>
>