This invention is a beginning-of-tape/end-of-tape detection apparatus and method for use in a tape drive system having supply reel, take-up reel, and capstan motion sensors. The invention comprises monitoring means for monitoring each of the angular position signals and processor means for computing...http://www.google.com.tw/patents/US5309300?utm_source=gb-gplus-share專利 US5309300 - Beginning/end of tape detection system
