Detector for eight to fourteen modulation (EFM) signal frame periods

摘要

The detector for an EFM signal frame period includes a frequency divider receiving an EFM signal and transmitting a frequency divided signal as a frame period. Signal, whose period represents the frame period of the received EFM signal. The frequency divider is of 1/7 type. The above described detector is used in a system for frequency control of a bit synchronisation clock signal used for reproduction of an EFM signal. There is a bit synchronisation clock signal generator and a control, counting the pulse width of a frame synchronisation clock signal contained in the EFM signal. INDUSTRIAL STANDARDS - Meets IEC908 international standard and JIS8605 Japanese standard.