RECEIVING DEVICE

PURPOSE:To select and receive a broadcast wave which is strong in its receiving electric field, by integrating a receiving signal and detecting the receiving strength by its integral period, in a receiving device for selecting and receiving plural broadcast waves. CONSTITUTION:When an operation switch is turned on, sweep voltage is supplied to a high frequency amplifier 2 from a control device 11, and when a broadcast wave is received, sweep of sweep voltage is stopped, and its receiving state is maintained. At the same time, prescribed voltage is generated from a reference voltage gnerator 9. On the other hand, a receiving signal is supplied to an integrator 8 from a detector 4, is integrated and is applied to a level deciding device 10. In this state, when an output of the integrator 8 exceeds voltage of the generator 9, the level deciding device 10 generates an output H, resets the integrator 8 and also controls the control device 11. That is to say, the time required for generating the output by the level deciding device 10 after turning is counted by the control device 11 and is stored. After that, sweep voltage of the control device 11 is raised in order and said operation is repeated.