Vtr apparatus
专利汇可以提供Vtr apparatus专利检索，专利查询，专利分析的服务。并且PURPOSE: To record automatically a program searching signal by connecting the output terminals of a monostable multivibrator circuit and a square wave oscillating circuit to each input terminal of a NAND circuit and superposing a square wave oscillating output to the erasing current of an overall width erasing head.
CONSTITUTION: A voice input signal 10 is inputted to a non-signal detecting circuit 1 and when high is outputted at the time of non-signal of intermusic, a monostable multivibrator is triggered by this rise and it is outputted. This output and the output of the non-signal detecting circuit are inputted to an AND circuit 3 and only in a period in which the non-signal time is longer than a reference time, high is outputted. As a result, the non-signal part of intermusic of a music source is distinguished from a non-signal part is music. Said outputs is inputted as the trigger of the monostable multivibrator and by this output and the NAND output of a square wave oscillating circuit 6, when a switching circuit 9 connected in series to an overall width erasing head 8 is turned on and off by some resistance value, by the frequency of the square wave oscillating circuit, only in a period in which the NAND output is high, a square wave oscillating output is superposed to an overall width erasing current and a program searching signal is recorded.
COPYRIGHT: (C)1986,JPO&Japio，下面是Vtr apparatus专利的具体信息内容。
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