A track cross signal generation circuit comprises a tracking error signal generation circuit, an offset compensation circuit, a level setting circuit, and a comparator. The comparator directly receives a tracking error signal output from the tracking error signal generation circuit without passing through...http://www.google.com.tw/patents/US5289447?utm_source=gb-gplus-share專利 US5289447 - Track cross signal generation circuit of optical disk device for correctly outputting track cross signal and correctly and stably carrying out seek operation even within high-speed region of beam
