KR950004789A - Melody generation circuit when broadcast reception is impossible - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio, and relates to a broadcast non-receiving melody generating circuit such that the radio is located in a place where broadcast reception is not possible, so that the radio can be output in place of the melody when no broadcast reception is possible.

A radio that receives a broadcasting frequency transmitted from a broadcasting station and outputs an audio signal has a radio frequency transmitted by the broadcasting station anywhere in a place where the broadcasting frequency transmitted by the broadcasting station propagates, i.e., where it is not blocked by terrain conditions or buildings or other obstacles. Acoustic signals could be enjoyed by tuning the frequency band, but they could not enjoy sound signals transmitted from the broadcasting stations in places where the broadcasting frequencies were cut off.

Therefore, a line was installed in the basement of a tunnel or a building to receive the broadcast frequency transmitted by the broadcasting station. However, there is a limitation, so if the listener cannot operate such a facility in all broadcasting blind spots and the listener operates the radio in the broadcasting blind spot, the broadcasting station transmits it. There was a problem that noise is output instead of one acoustic signal.

In particular, when enjoying a sound signal by receiving a broadcasting frequency transmitted to a broadcasting station using a radio attached to a car, the car often moves from a square area by moving frequently without stopping at a certain area. Therefore, there was a problem of providing a new source of stress causing the driver to interfere with driving.

Accordingly, the broadcast reception melody generating circuit of the present invention detects noise when the radio enters the blind spot as shown in FIG. 1 and outputs a melody stored in the melody generating IC, when the radio enters the blind spot of the broadcast. There is an effect to prevent that.

Description

Melody generation circuit when broadcast reception is impossible

Since this is an open matter, no full text was included.

1 is a circuit diagram according to the present invention.

Claims (1)

An antenna 5 for receiving a broadcast frequency transmitted from a broadcasting station, a tuner 10 for tuning a frequency band of the broadcast frequency received by the antenna 5, and a broadcast frequency tuned by the tuner 10 as an intermediate frequency. Amplifying the R signal and the L signal through the multiplexer 20 separating the intermediate frequency processor 15 and the output of the intermediate frequency processor 15 into R signals and L signals. In a radio having an amplifier 25 outputted to a speaker 30, an S-meter 35 for detecting a reception level of an intermediate frequency of the intermediate frequency processor 15, and an output level of the S-meter 35. And a melody generating IC 40 for outputting the melody to the speaker 30 through the amplifier 25 by driving the controller 50, and controlling the driving of the rear stage. 50) non-receiving broadcast reception characterized in that the configuration D. generating circuit. ※ Note: The disclosure is based on the initial application.