A phase lock circuit for compensation for bit frequency variations of information read from a movable magnetic media including a phase comparator, a number of low pass filters, a decoupling element and variable frequency oscillator which is temperature compensated....http://www.google.fr/patents/US4814725?utm_source=gb-gplus-shareBrevet US4814725 - Phase lock circuit for compensation for bit frequency variations
Phase lock circuit for compensation for bit frequency variations
