专利汇可以提供Reception display unit专利检索,专利查询,专利分析的服务。并且PURPOSE: To display optimum reception condition and to make easy for the adjustment of receiver, by providing the circuit detecting the phase reference code, ritriggerable monostable multi-vibrator, and light emission circuit with the receiver for such as TV multiplex character broadcast.
CONSTITUTION: In the TV multiplex character broadcast receiver such as teletext, the framing code used for the phase reference signal to take synchronism with the digital information is detected at the detection circuit 77, this detection pulse is inputted to the retriggerable monostable multivibrator 781. The output of the multivibrator 781 is inputted to the base of Tr 782, and Tr 782 drives the light emitting element 783 to make emission. The output of the multivibrator 781 has the time constant to keep H level for a longer time than the period of the detection pulse of the circuit 77, it is retriggered at the period of H level, and current flows to the element 783 continuously to illuminate it. If the detection pulse from the circuit 77 is not inputted, since no light emitting element illuminates, only when the digital information in multiplex is normally received, illumination display is made.
COPYRIGHT: (C)1980,JPO&Japio,下面是Reception display unit专利的具体信息内容。
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