Circuit for a mobile braodcast receiver

摘要

The mobile receiver receives a multiplex signal in a stereo decoder (1) and is supplied as a LF signal to the left and the right reproduction channels. The signal received goes also to a multipath detector (2) so that multipath interference can be detected. This detector includes a unit (3) for recognising the frequency, strength and length of this interference. The signals from this unit and the detector are used to produce (4) a signal for controlling the stereo basic width and the ratio of its reproduction part to that of the mono reproduction. For monopath interference between 1 Hz and 5 Hz, the resetting time varies between 50 ms and 1000 ms.