| 摘要 |
The present invention is directed to a record mode discrimination circuit for use in a 8 mm video, which is adapted to sample tracking error signals at a field period to input the sample hold out into a hysteresis comparator, and provided with a duty identification circuit wherein, in the case of that the variation component of 15 Hz is produced in the tracking error component, if the duty cycle is out of approximate 50, the switching operation of the reproduction mode is rendered to prohibit on the assumption of existing the unnecessary component of 15 Hz.
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