Television with telephone
专利汇可以提供Television with telephone专利检索，专利查询，专利分析的服务。并且PURPOSE: To automatically enlarge the sound of a television by connecting a telephone set the television in a circuit and detecting a signal when a transmission is completed by putting down a handset, for instance from a remote side.
CONSTITUTION: When the remote side raises the handset, the terminal 8 of a reverse signal detector 9 goes to a high level, so that the base of a transistor 7 goes to the high level and the transistor 7 is turned on. Accordingly, a voltage supplied to the terminal of a sound circuit 2 is equal to a voltage obtained by dividing a voltage supplied from a variable resistor 5 by a resistance and a variable resistor 6 and lower than at the time of putting down the handset. When a speech is completed and the remote side puts down the handset, the reverse signal is eliminated, the voltage is higher than at the time of raising the handset. Thereby, when the remote side rings off, the sound volume of the television can be immediately raised.
COPYRIGHT: (C)1988,JPO&Japio，下面是Television with telephone专利的具体信息内容。
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