JP2588430Y2 - Radio receiver - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver suitable for a vehicle-mounted radio receiver having a so-called auto-preset function for automatically presetting the frequency of a broadcasting station having a high received electric field strength.

[0002]

2. Description of the Related Art A conventional preset function is preferably implemented in an on-vehicle radio receiver mounted on an automobile. For example, the frequency of a broadcast that a listener frequently listens to in a normal living area can be determined. If the channel switch preset as described above is pressed from the state where another channel is being listened to while the other channel is being listened to, the channel switch is stored in the storage unit. This is realized by reading the broadcasted frequency and making the broadcast at that frequency audible.

Further, when a listener listens to a radio broadcast while traveling outside a normal living area, the user cannot listen to a broadcast of a frequency preset in the living area. It is necessary to re-preset the frequency of a new one by the same procedure and listen to the broadcast of that frequency. For this reason, in order to reduce the burden of a complicated preset operation, the reception frequency is swept, and the reception electric field strength is high, that is, the broadcast frequency that can be clearly received is automatically preset. A configuration having a function called an auto preset is used.

[0004]

In the above-mentioned prior art,
The frequency preset in association with each channel switch in the living area, and the frequency re-preset by the auto preset in the living area after rewriting the preset frequency once again, for example, at the place where the preset operation is performed Do not always coincide with each other due to the difference in the electric field strengths. Therefore, even if the operator tries to listen to a desired broadcast, he does not know which channel switch the broadcast corresponds to, and in order to return to the familiar preset contents of the preset, the preset operation must be performed for each channel switch. It has to be redone and operation is inferior.

Therefore, even if the frequency is preset in a normal living area, if a different frequency is preset outside the living area, the previous frequency is rewritten, and when returning to the living area again, the frequency in the living area is set again. We had to fix it, which was a lot of work.

SUMMARY OF THE INVENTION An object of the present invention is to provide a radio receiver with improved operability, which can be easily restored after once deleting preset contents.

[0007]

According to the present invention, there is provided one or more preset operation means, a first storage means having a storage area individually corresponding to each of the preset operation means, and an individual to each of the preset operation means. A second storage unit having a storage area corresponding to the first storage unit, and information related to the reception frequency written in the first storage unit by a predetermined first operation of each preset operation unit. Receiving frequency setting means for writing information related to a receiving frequency to the second storage means by operation, and reading out the corresponding information from the first storage means by a predetermined third operation of preset operation means; At the frequency set by the means, receiving means for receiving a radio broadcast, including return operation means, when the return operation means is operated,
The receiving frequency setting means determines whether or not reception at a frequency corresponding to each of the second storage means in which the information is stored is possible based on an output from the receiving means. A radio receiver characterized in that the storage contents of the first storage means corresponding to the second storage means are updated to the storage contents of the second storage means.

[0008]

According to the present invention, the radio receiver includes one or more preset operation means and return operation means.
Also provided therein are a first storage means and a second storage means having storage areas individually corresponding to the respective preset operation means, both of which are used for writing and reading information to and from each storage area. It is connected via a receiving frequency setting means for performing processing. Further, the receiving frequency setting means is connected to the receiving means.

[0009] The operator operates the first preset operation of each preset operation means to perform the first operation from the reception frequency setting means.
Information related to the reception frequency can be written in the storage means. Similarly, information related to the receiving frequency for return can be written in the second storage means by the second operation, for example, by operating the preset operation means for a longer time than the first operation.

[0010] In the case of receiving a radio broadcast, the reception frequency setting means stores the corresponding information from the first storage means by a predetermined third operation of the preset operation means, for example, an operation shorter than the first operation. Read. The receiving means receives a radio broadcast at a frequency corresponding to the read information.

On the other hand, return operation means is provided in connection with the reception frequency setting means, and when the return operation means is operated, the reception frequency setting means causes each of the second information storing the information to be stored. It is determined whether or not reception at a frequency corresponding to the storage unit is possible based on the output from the reception unit, and when possible, the storage content of the first storage unit corresponding to the second storage unit is determined. The content stored in the second storage means is updated.

Therefore, by the first operation, once,
Even if the preset contents are rewritten, the preset contents to be read out are automatically restored when the broadcast operation preset by the second operation becomes possible by operating the return operation means. Even if the preset contents are changed, it is possible to easily return to frequently used preset contents, thereby improving operability.

[0013]

1 shows a radio receiver 1 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an electrical configuration of the embodiment. In the radio receiver 1, a reception signal received by an antenna 4 is input to a detection circuit 6 via a front-end circuit 5 in a reception circuit 2, which is a receiving means, and is demodulated into an audio signal.
The audio signal is transmitted to a speaker 8 via a low-frequency amplifier 7.
And is acousticized.

In connection with the front end circuit 5, S
A meter detection circuit 9 is provided. The S-meter detection circuit 9 receives the intermediate frequency output from the front end circuit 5, performs DC detection on the intermediate frequency output, and outputs the detected intermediate frequency output as a detection output representing the received electric field intensity. It is realized by a microcomputer or the like, and outputs to a processing circuit 11 which is a reception frequency setting means. The processing circuit 11 has a timer 15 and performs a phase lock loop (hereinafter abbreviated as PLL) to perform a channel selection operation described later based on the S meter output.
The data such as the N value is output to the circuit 10.

In connection with the processing circuit 11, a memory 12 as first and second storage means and an operation switch 13
And a display device 14 are provided. In the memory 12, a reception frequency, a return frequency, and the like preset by an input operation from the operation switch 13 are stored. The processing circuit 11 causes the front end circuit 5 to perform a tuning operation based on the contents stored in the memory 12 and the like in response to a tuning operation from the operation switch 13, and causes the display device 14 to perform a reception frequency and the like. Is displayed.

That is, the processing circuit 11 includes the operation switch 1
In response to the operation of the preset switches 13a of a plurality of channels from 1 to n out of 3, the N value of the reception frequency corresponding to the preset switch 13a of the operated channel is read from the memory 12, and the PLL circuit 10
Set to. As a result, the tuning frequency of the front end circuit 5 becomes a value corresponding to the preset frequency, and the reception is performed. Also, the auto preset switch 13
When b is operated, the processing circuit 11 changes the oscillation frequency of the PLL circuit 10 to sweep the reception frequency, and writes the N values into the memory 12 in order from the frequency with the highest received electric field strength. When the recall switch 13c is operated, an automatic return operation described below is performed.

When receiving a radio broadcast, the operator:
In the living area, the broadcast frequency desired to be listened to is preset in association with each preset switch 13a, and the preset contents are read and received as necessary. However, if the user goes out of the living area to perform reception, the reception cannot be performed properly with the preset contents in the living area. Therefore, it is necessary to rewrite the preset contents.

In such a case, in the present invention, if the operation of storing the preset contents in the living area as the return frequency in the memory 12 by the second operation is performed, the reception frequency is separately set by the first operation. By simply operating the recall switch 13c, the reception frequency is automatically rewritten, and the reception frequency is automatically rewritten. This saves the trouble of resetting the preset contents.

FIG. 2 is a time chart showing the pressing time of the preset switch 13a of the radio receiver 1 of the present invention and the operation of the processing circuit 11 corresponding thereto. In one embodiment of the present invention, the difference between the reception frequency calling, the reception frequency writing, and the return frequency writing is distinguished by the difference in the pressing time of the preset switch 13a corresponding to each channel. That is, at time t1, when the preset switch 13a of a certain channel is pressed, the timer 15 is operated, and measurement of the pressing time of the preset switch 13a is started. If the time from when the switch is pressed to when it is released is less than 2 seconds, it is determined that the operation is for calling the reception frequency, and the content stored in the memory 12 corresponding to the pressed channel is read and reception is performed at the preset frequency.

If two seconds or more have elapsed between the time t1 when the preset switch 13a was pressed and the time t2 when the preset switch 13a was released, it is determined that the receiving frequency writing operation was performed, and the corresponding channel was pressed. The N value is written in the memory frequency storage area in the memory 12 area. Further, if the pressing time of the preset switch 13a has elapsed for 5 seconds or more, it is determined that the return frequency writing operation is performed, and the return frequency is stored in the storage area of the return frequency of the memory 12 corresponding to the pressed channel. Write the N value for the reception frequency of

FIG. 3 shows the above-mentioned preset switch 13a.
FIG. 4 is a flowchart showing a timer processing operation by pressing the button, FIG. 4 is a flowchart showing a process of pressing the recall switch 13c, and FIG.

First, in FIG. 3, as an example, channel 1
The following describes the timer processing when the preset switch 13a is pressed. In step a1, it is confirmed whether or not the preset switch 13a of the channel 1 has been pressed, and if not, the flag SW1f (first switch-on flag) is cleared in step a2. If the preset switch 13a of the channel 1 has been pressed, the process proceeds from step a1 to step a3, and it is confirmed whether the flag SW1f has been cleared. If the flag SW1f has been cleared, the preset switch 13a has been depressed for the first time this time, so that the timer 15 is started after the timer 15 is reset in step a4. Next, in step a5, the flag SW1f is set to 1, and in step a6, the reception frequency is called, and the N value relating to the reception frequency preset for the channel 1 is read from the memory 12. Then, reception is performed.

In step a3, if the flag SW1f is 1, it is determined that the preset switch 13a of channel 1 has been pressed down before. In the next step a7, the preset switch 13
The pressing time of a is checked, and if 2 seconds have not elapsed, this process ends and the process proceeds to another process. If 2 seconds have elapsed, the frequency of the currently received broadcast is set as the receiving frequency in step a8. The data is written to an area of the memory 12 where the N value of the reception frequency of the channel 1 is stored. Next, in step a9, the pressing time is checked again. If 5 seconds have not elapsed, this process ends and the process proceeds to another process. If 5 seconds have elapsed, the frequency of the currently received broadcast is restored in step a10. Is written into the area of the memory 12 in which the N value of the return frequency of the channel 1 is stored as the use frequency.
Thus, the process of the timer process is completed, and the process shifts to the process of pressing the recall switch 13c.

At step b1, it is confirmed whether or not the recall switch has been pressed, and if not, the process returns to the main routine. If pressed, the return mode start flag RMf is set to 1 in step b2, and the process returns to the main routine.

In the main routine, first, step c1
It is checked whether or not the flag RMf is set to 1; if it is not set, the process proceeds to another process. If it is set, the return frequency is read from the memory 12 at step c2 and received. The electric field strength of the return frequency is checked within a period in which the sound is not interrupted, for example, within about 0.1 second. In step c3, it is confirmed whether or not clear reception is possible when the electric field strength is equal to or higher than a predetermined level. If it is possible, the return frequency is set to the reception frequency in step c4. This completes the return mode processing for one channel.

The case where the reception is not possible in step c3 and the case where the reception is possible and the process of step c4 is completed are the cases where the exchange of the return frequency to the reception frequency of all the channels is performed in the next step c5. It is confirmed whether or not the processing has been completed. If the processing has not been completed, this processing is completed and the processing shifts to another processing. When the exchange of all the channels is completed, the flag RMf is cleared and the process of the automatic return mode ends.

After this processing is completed, other processing such as displaying the reception frequency on the display device 14 is performed. Also,
The processing of the flowchart shown in FIG.
This is repeated until the power supply of the channel is cut off or the exchange of the receiving frequencies of all the channels to the return frequency is completed.

As described above, the preset content can be returned to the preset return frequency by a simple switch operation. Therefore, even if the preset contents are once rewritten, for example, when the user goes out of the living area, a reset operation is performed, and when reception becomes possible, the previous preset frequency corresponding to each preset switch 13a is automatically set. The operability can be improved without causing confusion and without having to redo a complicated preset operation. In the present embodiment, the switching to the automatic return mode is determined by whether the recall switch 13a is pressed. However, for example, other switches such as simultaneously operating a plurality of switches that are not operated in the normal operation are used. Means may be used.

[0029]

As described above, according to the present invention, the information about the return frequency written in the second storage means by the preset second operation of the preset operation means is obtained by operating the return operation means. When reception at that frequency becomes possible, the contents stored in the first storage means are updated and written. Therefore, even when the storage contents of the first storage means are temporarily changed, the preset information can be stored in the second storage means by storing the desired information, for example, the information related to the reception frequency of the broadcast station which is frequently listened to. Even if the contents are changed, it is possible to easily return to frequently used preset contents, and operability can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a radio receiver 1 according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a pressing time of a preset switch 13a of the radio receiver 1 and an operation of the processing circuit 11 corresponding thereto.

FIG. 3 is a flowchart showing a timer processing operation when a preset switch 13a is pressed.

FIG. 4 is a flowchart of a depression process of a recall switch 13c.

FIG. 5 is a flowchart of a process during an automatic return mode.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 radio receiver 2 reception circuit 9 s meter detection circuit 10 PLL circuit 11 processing circuit 12 memory 13 operation switch 13 a preset switch 13 b auto preset switch 13 c recall switch 15 timer

Claims (1)

(57) [Scope of request for utility model registration] 1. A storage device having one or more preset operation means, a first storage means having a storage area individually corresponding to each of the preset operation means, and a storage area individually corresponding to each of the preset operation means. Second storage means, and information relating to the reception frequency is written to the first storage means by a first predetermined operation of each preset operation means, and is stored in the second storage means by a second predetermined operation of the preset operation means. Receiving frequency setting means for writing information related to a receiving frequency and reading the corresponding information from the first storage means by a third predetermined operation of preset operating means; and a frequency set by the receiving frequency setting means, Receiving means for receiving a radio broadcast, and return operation means, wherein when the return operation means is operated, the reception frequency setting means stores the information. It is determined based on the output from the receiving means whether or not reception at the frequency corresponding to each of the second storage means is possible, and if possible, the first corresponding to the second storage means is determined. A radio receiver for updating the storage content of a storage unit to the storage content of the second storage unit.