Category feeds

With this code I can display category feeds in the sidebar:

<?php
$cats = get_the_category();
$num = count($cats);
for($i=0; $i<$num; $i++)
{
$cat=$cats[$i];
echo '<a href="';
get_category_rss_link(true,$cat->cat_ID,$cat->category_nicename);
echo '">'.$cat->cat_name.'</a>';
if ($i != $num-1) echo ', ';
}
?>

The problem is this will fetch the feeds of all categories assigned to posts pertaining to a category.

What I actually want is a single category feed when viewing a specific category. I suppose this set up succesfully at this support forum (“RSS feed for this forum”).

Kind regards,
st