An interesting spin on an old design. Thought I'd post it since it has percolated up just when I actually need to design a little BPF for a project.
http://edn.com/design/analog/443036...37efb43bbb5506bf181e69492&elqCampaignId=17264
http://edn.com/design/analog/443036...37efb43bbb5506bf181e69492&elqCampaignId=17264