JP3036974B2 - 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,
In particular, it relates to, for example, a radio receiver with a memory function of a synthesizer system.

[0002]

2. Description of the Related Art As prior art of this type, transmission frequencies of broadcasting stations in several areas are stored in advance, and a broadcasting station in the area can be called by designating an area to be actually used. Japanese Patent Application Laid-Open No. 2-76409 (Sony Corporation), published on March 15,
2-44426 filed on March 27, 2008
No. (New Japan Radio Co., Ltd.).

[0003]

In the former prior art,
The transmission frequencies of broadcast stations that can be received for each area are
, The transmission frequency could not be changed. Further, in the latter conventional technique, when the transmission frequency of the broadcasting station is changed, it is necessary to write a change mark and new frequency data in the RAM, but a new area for the change mark is required. However, there is a problem that the number increases.

[0004] Therefore, a main object of the present invention is to provide a radio receiver capable of changing the transmission frequency without increasing the memory capacity.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a multi-region
Which stores in advance the transmission frequencies of a plurality of broadcasting stations belonging to
Memory, multiple preset areas and one work area
And a plurality of broadcasting stations belonging to a desired area
From the first memory and read out the plurality of
First writing means for individually writing in the reset area,
Set the transmission frequency of the desired station to one of the preset areas.
2nd writing method to read from and write to the work area
Step, transmission frequency of desired broadcast station stored in work area
Tuning means to tune to numbers, any preset area
And a transmission frequency of a desired broadcasting station.
Is read from the work area and selected by the selection means.
Third writing means for writing to the preset area
A radio receiver.

[0006]

When changing the transmission frequency stored in any of a plurality of preset areas , for example, pressing an up / down key to change a desired transmission frequency from the preset area.
The data is written in the second memory area and displayed on the LCD. When you press the numeric key after pressing the memory key, the LCD
, Ie, the transmission frequency of the work area, is stored in the preset area designated by the ten keys. If the transmission frequency has been stored in the designated preset area before, the transmission frequency is changed to a new transmission frequency, and if the transmission frequency has not been stored before, the transmission frequency is added.

[0007]

According to the present invention, the frequency for tuning can be changed.
The work area to be stored can be changed or added to the frequency signal.
Since it is used, it is possible to rewrite the contents of the preset area to the transmission frequency of the broadcasting station desired by the user, or to add the transmission frequency of the required broadcasting station without requiring a new memory capacity, thereby improving operability. Also improve.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

Referring to FIG. 1, a radio receiver 10 of this embodiment includes an FM / TV antenna 12 and an AM antenna 14, and radio waves input from the antennas 12 and 14, respectively, FM circuits having desired frequencies are provided to tuning circuits 16 and 18 each including a voltage variable tuning element.
A TV broadcast wave signal and an AM broadcast wave signal are extracted. The tuning circuits 16 and 18 are supplied with a control voltage signal for adjusting the tuning circuits 16 and 18 from the LPF 40, respectively. The FM / TV broadcast wave signal and the AM broadcast wave signal are supplied to RF (high frequency) amplifiers 20 and 2.
2 are supplied to mixer circuits 24 and 26, respectively. The mixer circuits 24 and 26 are supplied with a local oscillation signal from the VCO 36 and frequency-converted to an IF (intermediate frequency) signal.
Given to. The signal from the detection circuit 30 is AF
After being amplified by the amplifier 32, it is supplied to the speaker 34.

The VCO 36 has a PLL circuit 38
Is smoothed by the LPF 40 and provided as a control voltage signal. The local oscillation frequency of the VCO 36 is changed by the control voltage signal, and the local oscillation signal is input to the PLL circuit 38. In the PLL circuit 38,
The reference frequency signal is compared with the local oscillation signal from the VCO 36. If there is an error, an error signal is given to the LPF 40, and the loop is repeated until the error disappears. The reference frequency signal provided to the PLL circuit 38 is set from the CPU 44 via the port 42. The PLL circuit 38
VCO 36 can be set to AMVCO or F
Switch to MVCO.

The CPU 44 has a ROM 4 via a bus 46.
8 and the RAM 50 are connected. As shown in FIG. 2 and Tables 1 to 6, in the ROM 48, for example, transmission frequency data of FM and AM broadcast stations in each region such as Sapporo, Tokyo, Nagoya, Osaka, Hiroshima, and Fukuoka are stored in advance as a list. .

[0012]

[Table 1]

[0013]

[Table 2]

[0014]

[Table 3]

[0015]

[Table 4]

[0016]

[Table 5]

[0017]

[Table 6]

The RAM 50 stores, for example, FM broadcast and A
A preset area (1) to (10) for storing transmission frequency data of the M broadcast and a work area are included in the preset areas (1) to (10). The transmission frequency data of a broadcasting station in an arbitrary area (Osaka in the example shown in Table 4) is read and stored. The work area of the RAM 50 stores transmission frequency data currently being received. The CPU 44 includes a bus 46 and a port 52.
A key input unit 54 including, for example, a numeric keypad, a memory key, a band key, and an up / down key (none of which are shown) is connected to the CPU 44. The CPU 44 is connected to the CPU 44 via a bus 46 and an LCD driver 56. LCD58
Is connected.

In the operation, as shown in FIG. 3, when the power is first turned on in step S1, a command to store the initial area data in the RAM 50, which is a preset memory, is issued from the CPU 44, and the initial area data is set in the RAM 50. Is done. As the initial area data, transmission frequency data of a broadcasting station in an arbitrary area among the transmission frequency data of the broadcasting stations in the areas shown in Tables 1 to 6 stored in the ROM 48 is selected in advance. Subsequently, in step S3, it is determined whether or not there is a key input. If there is no key input, the process waits.
, A corresponding subroutine of FIG. 4 to FIG. 7 is called.

First, if there is a ten-key input in step S3, a preset reception mode is set as shown in FIG. 4, and it is determined in step S7 that ten-key input has been made. In step S9, the preset areas (1) to Transmission frequency data corresponding to a ten-key input among the resonance frequency data stored in (10) is stored. After the PLL data is created in step S11 and the LCD data is created in step S13, the process returns to step S15 in FIG. Then, in step S15, the PLL data is set in the PLL circuit 38, and then in step S17, the LCD data is set in the LCD driver 56,
After receiving the preset, the process returns to step S3.

If there is a memory key input in step S3, a region setting mode is set as shown in FIG.
At step S19, it is determined that the memory key has been pressed, and for example, as shown in FIG.
The display flashes for about 10 seconds. If the band key is pressed while the [PGM] display is blinking in step S21, the area of the transmission frequency data stored in the RAM 50 at that time (last channel) is displayed on the LCD 58 in step S23. You. In FIG. 8, "SA" indicating Sapporo is displayed. If the band key is continuously pressed in step S25, the area is changed in step S27, and the process returns to step S23 to display another area on LCD 58. In this way, a desired area to be set is displayed. In step S25, every time the band key is pressed, as shown in FIGS.
SA (Sapporo) → TO (Tokyo) → NA (Nagoya) → OS
(Osaka) → HI (Hiroshima) → FU (Fukuoka) → SA (Sapporo)
→ The area displayed on the LCD 58 is switched. If the memory key is pressed while [PGM] is blinking (about 10 seconds after the band key is released) in step S29 without pressing the band key in step S25, the data stored in the ROM 48 is stored in step S31. The transmission frequency data of the broadcasting station in the desired area is stored in RAM
Written in 50 preset areas. Then, PLL data is created in step S33 shown in FIG.
In step S35, display data is created, and FIG.
Is returned to step S15. Step S
If the band key and the memory key are not pressed while the [PGM] display is blinking in step 21 and step S29, the process proceeds to step S33.

Further, at step S3,
If the down key is input, the preset area rewriting mode is set as shown in FIG. 7, and the desired station is received by the up / down key in step S37 . One
That is, the transmission frequency of the desired station is preset in the RAM 50.
Write from the work area to the work area. Its After, pressing the memory key at step S39, while displaying the reception frequency to the LCD58 as shown in FIG. 14 is displayed [PGM] flashes approximately 10 seconds. Then, in step S41, when one of the ten keys is pressed while the [PGM] display is blinking, the selected ten key (4 in this embodiment) is displayed on the LCD 58 as shown in FIG. In the above, the data of the work area of the RAM 50 is stored in the corresponding preset area (preset area (4) in this embodiment). At this time, if the previous data is stored in the preset area, the previous data is changed to new transmission frequency data, otherwise, the transmission frequency data is added. Then, after the display data is created in step S45, the process returns to step S17 in FIG. If the numeric key is not pressed while the [PGM] display is blinking in step S41, the process proceeds to step S45.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is an illustrative view showing a simplified memory map of a ROM and a RAM;

FIG. 3 is a flowchart showing a main program of the embodiment.

FIG. 4 is a flowchart showing a subroutine of a preset reception mode.

FIG. 5 is a flowchart showing a subroutine of an area setting mode.

FIG. 6 is a flowchart showing a continuation of the operation in FIG. 5;

FIG. 7 is a flowchart showing a subroutine of a preset area rewriting mode.

FIG. 8 is an illustrative view showing a Sapporo display state of the LCD;

FIG. 9 is an illustrative view showing a Tokyo display state of the LCD;

FIG. 10 is an illustrative view showing a display state of Nagoya on an LCD;

FIG. 11 is an illustrative view showing a display state of Osaka on an LCD;

FIG. 12 is an illustrative view showing a Hiroshima display state of the LCD;

FIG. 13 is an illustrative view showing a Fukuoka display state of the LCD;

FIG. 14 is an illustrative view showing a rewritable state of a preset area;

FIG. 15 is an illustrative view showing a completion state of rewriting of a preset area;

[Explanation of symbols]

 10: Radio receiver 44: CPU 48: ROM 50: RAM 54: Key input unit 58: LCD

Claims (1)

(57) [Claims] 1. The transmission frequency of a plurality of broadcasting stations belonging to a plurality of areas.
First memory for storing wave numbers in advance, including a plurality of preset areas and one work area
The second memory stores transmission frequencies of a plurality of broadcasting stations belonging to a desired area.
Read from one memory and store in the plurality of preset areas
A first writing means for individually writing, a transmission frequency of a desired broadcast station in one of preset areas;
A second write to read from the a and write to the work area
Means for transmitting the desired broadcast station stored in the work area
Tuning means for tuning to the frequency, selecting means for selecting one of the preset areas, and
And the transmission frequency of the desired broadcast station in the work area
From the preset selected by the selection means.
A radio receiver , comprising: a third writing means for writing to a remote area .