JPS62164421U - - Google Patents

Description

[Brief explanation of drawings]

1 to 8 show an embodiment of the radio traffic information selection device according to this invention, FIG. 1 is a functional block diagram, and FIG. 2 is a block diagram showing the overall configuration of the first embodiment. , FIG. 3 is a flowchart of the channel selection operation of the microcomputer section, FIG. 4 is a block diagram showing the configuration of an AM broadcasting station, FIG. 5 is an explanatory diagram of FIG. 4,
FIG. 6 is a block diagram showing an example of the second AM broadcasting station, FIG. 7 is a block diagram of the receiving section, and FIG. 8 is a flowchart of the receiving operation. 1: AM broadcast receiving means, 2: Channel selection means, 3: F
M broadcast receiving means, 4: channel selection means, 5: identification signal detection means, 6: level detection means, 7: comparison means, 8
: Receive mode switching means.

Claims (1)

[Claims for Utility Model Registration] (1) In an AM broadcast station that provides traffic information in addition to regular AM broadcast programs, a first identification signal indicating that the station is a broadcast station that provides traffic information; AM broadcast receiving means and its channel selection means capable of receiving broadcast waves with at least a second identification signal indicating the start of the traffic information broadcast, and receiving broadcast waves of normal FM broadcast programs. In a PLL synthesizer radio receiver that is independently equipped with an FM broadcast receiving means and its channel selection means and is configured to perform reception operations at the same time, (a) an identification device for detecting the first and second identification signals; (b) level detection means for checking the received signal level of an AM broadcast being simultaneously received as a counterprogram when receiving and listening to an FM broadcast; (c) a detection output of the level detection means and a preset level detection means; When the detection output is less than the reference value, the N of the PLL circuit of the AM broadcast channel selection means is compared with the reference value.
(d) when the control signal of the comparing means is applied, changing the N value of the PLL circuit to perform a preset scan or auto sweep operation; AM broadcast channel selection means for receiving another traffic information providing station whose reception signal level is above a certain level and to which the first identification signal of the identification signal detection means is applied, and setting it in a standby state; e) mode switching means for automatically switching the reception mode to a state in which AM broadcasting can be heard when the second identification signal of the identification signal detection means is applied. (2) Claim 1 of the utility model registration claim, characterized in that, when listening to FM broadcasts, the level check of the AM broadcast reception signal which is set to the standby state is performed intermittently at regular intervals. Radio traffic information selection device as described. (3) The level detection means detects the received signal level of an AM broadcasting station, and the operation of the comparison means that compares the detected level with a preset reference value is performed twice consecutively, and based on the results. 2. The radio traffic information selection device according to claim 1, wherein the radio traffic information selection device is configured to generate and output a control signal for changing the N value of a PLL circuit of an AM broadcast station selection means. (4) The radio according to claim 1 of the utility model registration claim, characterized in that when the identification signal detection means detects the first and second identification signals, a lamp display or a buzzer is used to notify the user. Traffic information selection device.