Active Filters Home › Forums › General Electronics › Active Filters This forum has 1 topic, 2 replies, and was last updated 9 years, 9 months ago by MarCatan. Viewing topic 1 (of 1 total) Topic Voices Posts Last Post LM324 Quad opamp simulation Started by: DannyHendrickx 0 2 9 years, 9 months ago Viewing topic 1 (of 1 total) You must be logged in to create new topics. Log In Username: Password: Keep me signed in Log In