Television receiver with telephone set
专利汇可以提供Television receiver with telephone set专利检索，专利查询，专利分析的服务。并且PURPOSE: To allow the viewer to enjoy the television till an opposite party hooks off a handset by detecting a signal when the opposite handset is hooked off so as to decrease the television sound volume or to turn off the sound.
CONSTITUTION: The sound volume from a speaker 1 depends on a voltage at a terminal 3 of a sound circuit 2. When a phone call is made by a telephone set 10 and the opposed party hooks off the handset, a terminal 8 of a reverse signal detector 9 goes to a high level, a voltage is applied to a base of a transistor (TR) 7, which is turned on. With the TR 7 turned on, a voltage supplies to the terminal 3 of the sound circuit 2 is a voltage being the division of the voltage supplied from a variable resistor 5 by a resistor 4 and a variable resistor 6 and lower than the voltage when the handset is hooked off. The voltage in this case is adjusted by using the variable resistor 6. Thus, the output of the sound circuit 2 is smaller and the sound from the speaker 1 gets smaller.
COPYRIGHT: (C)1988,JPO&Japio，下面是Television receiver with telephone set专利的具体信息内容。
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