RECORDING AND REPRODUCING DEVICE

摘要

PURPOSE:To shorten the non-recorded sound reproducing time by limiter-amplifying a signal from a reproducing head, inputting it to a comparator circuit after peak detection, delaying a voltage which causes a peak detection output to rise below the prescribed level during the prescribed period by means of a time-limit circuit to energize a mode switching circuit and switching it to a rapid traverse function. CONSTITUTION:Signals recorded on a magnetic tape are converted into electrical signals by the reproducing head 1, amplified by a reproduction signal amplifier circuit 2, further amplified up to a certain width value by a limiter amplifier circuit 3, and detected by a peak detector 4, thereby obtaining DC signals in proportion to their amplification values. Then they are inputted to the comparator circuit 5, and compared with a reference voltage below the prescribed level to detect the presence or absence of the reproduction signal. When the input signal goes below the prescribed level, the signal for rising at the point can be obtained. This signal is impressed to a time constant circuit 7, and the voltage for rising by the prescribed time constant from the point when the impressed signal rises can be obtained and compared with the reference voltage in the comparator circuit 8, thereby obtaining the voltage signal for rising at the point beyond said voltage. Thus the reproduction/rapid traverse mode switching circuit 9 is switched in a rapid traverse mode to raise the speed of a motor 10.