| 摘要 |
<p>PURPOSE:To enhance the retrieval efficiency of tape recording contents, by switching the tape feeding speed for the cue/review operation according to the recording/ reproducing tape running speed of a tape recorder. CONSTITUTION:When switches 12 and 20 are turned on and switch 18 is turned off and switch 16 is switched to the first contact side at a cue or review time, electric power is fed directly from power source 10 to motor 22 through resistance R10+R14, and motor 22 rotates in a speed corresponding to approximately 3.6- 4.8cm/s but is adjusted by changing resistance R10. In this case, Eg>Es10 becomes true, and the output-side potential of amplifier 24 is lowered, and diode 23 is biased reversely and is cut off, and therefore, servo circuit 27 does not operate. However, electric power is fed to amplifier system 28, and amplifier system 28 becomes the reproducing state. Next, when switch 16 is switched to the second contact side, electric power is fed from power source 10 to motor 22 through resistance R12 +R14, and motor 22 rotates in a speed corresponding to approximately 7.2-9.5cm/s and is adjusted by resistance R12. Consequently, the retrieval efficiency of recording contents can be enhanced.</p> |
