| 摘要 |
PURPOSE:To decide on a noiseless state extremely stably and accurately and to obtain a still reproduction screen having no noise bar by feeding a tape at a slow speed after a pause button is operated, and stopping the tape by the output of a state detecting circuit. CONSTITUTION:The output of a head B is supplied to a noise detecting circuit 10 through a head amplifier 4 and an noise pulse is detected on the basis of a reproduced envelope. A gate pulse and the noise pulse are supplied to an AND gate 12 to detect a time coincidence between the both. When a coincidence output is generated by the AND Gate 12, a flip-flop 13 is set by the output and its output is supplied as a control signal (s) to a capstan motor control circuit 9. Thus, a slow or intermittent driving signal supplied from a control circuit 9 to a capstan motor is stopped to stop the tape. Then, noiseless still reproduction is performed until the pause button 8 is released. |
