Hi,
On the subject of the band pass filter, I was looking at this circuit
today and was wondering if it could be powered from a single supply? I
assume the + op amp inputs could be connected to a voltage reference of
half the supply (using two equal value resistors) but what about the
other ground points such as the 4.7k and 15k resistors?
James
Mark wrote:
On the subject of the band pass filter, I was looking at this circuit
today and was wondering if it could be powered from a single supply? I
assume the + op amp inputs could be connected to a voltage reference of
half the supply (using two equal value resistors) but what about the
other ground points such as the 4.7k and 15k resistors?
James
Mark wrote:
>
> On 6/2/07, Larry T. put forth:
> >I just need to find a small, simple envelope follower...)
>
> You can just wrap a full-rectifier around an op-amp followed by a
> one-pole LPF (a cap going to ground). There are numerous examples of
> various effects containing this sub-circuit on the web.
>
> You might find this article interesting:
>
> http://www.geofex.com/Article_Folders/noteproc/noteproc.htm
> <http://www.geofex.com/Article_Folders/noteproc/noteproc.htm>
>
>