| 摘要 |
An automatic fast action automatic reversing tape recording system comprising a first detecting circuit for generating a first output signal which changes from one state to another state only when the end of the record coated portion of the tape is detected by the sensor in the forward mode of the apparatus, a second detecting circuit for generating a second output signal which changes from one state to another state only when a non-recorded area of the tape is detected in the fast-forward or fast-rewind mode of the apparatus, a third detecting circuit to which both of said first and second output signals are supplied for generating a switching signal to change the mode of the apparatus when either of said output signals is maintained in said another state for predetermined times measured by the same time constant circuit. The third detecting circuit may include an integration circuit which is charged to different DC voltages by said first or second output signals which are in their one state in response to the mode of the apparatus and are then discharged along a time constant from a time when each of said first or second output signals changes to its said other state.
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