| 摘要 |
<p>PURPOSE:To reduce the size of the constitution of a recorder and to improve the reliability of retrieving operation, by retrieving a desired program in fast forwardmode only by an electronic circuit. CONSTITUTION:In fast-forward mode, the output waveform of a playback head 12 is shaped 19 and made into pulses 20, and then differentiation 21 is performed to reset a counter 22. The output of a monostable multivibrator 20, on the other hand, is inverter 23 to trigger a monostable multivibrator 24, whose output is differentiated 21, thereby resetting the counter 22. A reproduced signal is A/D-converted 18 and latched 25 to be stored in a memory 26. The contents of the memory 26 are addressed on the basis of the contents of the counter 22 and read out successively at prescribed timing, and they are D/A-converted 30 and supplied to a speaker 15. As a result, a desired program is retrieved easily and rapidly.</p> |
