The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 50: Proximity Detector Features Ultrasonic Transducers (PDF, 81kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 50: Jul 09, 1998 ICM7555 Low-Power, General-Purpose Timer Full Data Sheet (PDF, 3MB) Free Samples MAX406 Single, Dual, Quad, 1.2µA Max, Single-Supply Op Amps Full Data Sheet (PDF, 7.4MB) Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (81kB)  AN50, AN 50, APP50, Appnote50, Appnote 50