JPH0621770A - Radio receiver - Google Patents

Abstract

PURPOSE:To change the transmission frequency without changing the memory capacity so much by providing a means to rewrite the transmission frequency stored in a memory so as to secure the adaptation to the using state. CONSTITUTION:When the transmission frequency stored in a RAM 50 is changed, an up-down key, for example, is pushed and the desired frequency is set. This frequency is displayed on an LCD. Then a memory key and the ten keys are pushed. Thus the displayed frequency is stored in an area of the RAM 50 that is designated by the ten keys. The transmission frequency if stored previously in the area is changed into the new transmission frequency. If not, the transmission frequency is added.

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, for example, it relates to a synthesizer type radio receiver with a memory function.

[0002]

2. Description of the Related Art As a conventional technique of this kind in which transmission frequencies of broadcasting stations in several regions are stored in advance and a region to be actually used can be designated to call the broadcasting station in that region, for example, 1990 Japanese Patent Application Laid-Open No. 2-76409 (Sony Corporation) and Heisei 2
Application published on March 27, 2014
No. Gazette (New Japan Radio Co., Ltd.).

[0003]

In the former prior art,
The transmission frequencies of broadcasting stations that can be received for each area are stored in ROM
It could not be changed because it was permanently stored in. Further, in the latter conventional technique, when the transmission frequency of the broadcasting station is changed, it is necessary to write the change mark and the new frequency data in the RAM. However, since an area for that is newly required, the capacity of the RAM is increased. There was a problem in that

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]

According to the present invention, there is provided a first memory for storing in advance a list of transmission frequencies of broadcasting stations, and a first memory.
A radio receiver including a second memory that reads out and stores a transmission frequency of a broadcasting station in a desired area from the memory, and includes a rewriting unit that rewrites the transmission frequency stored in the second memory so as to match a usage state. It is a radio receiver characterized by.

[0006]

When the transmission frequency stored in the second memory is changed, for example, the up / down key is pressed to set a desired frequency and the LCD is displayed. Then, when the ten key is pressed after pressing the memory key, the frequency displayed on the LCD is stored in the area of the second memory designated by the ten key. When the transmission frequency is previously stored in the area, the transmission frequency is changed to a new transmission frequency, and when the transmission frequency is not previously stored, the transmission frequency is added.

[0007]

According to the present invention, since the second memory for reading and storing the transmission frequency of the first memory can be rewritten, a new memory capacity is not required and the contents of the second memory can be requested by the user. The operability can be improved by rewriting to the transmission frequency of the broadcasting station to be used or adding the required transmission frequency of the broadcasting station.

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

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 are An FM having a target frequency is provided to tuning circuits 16 and 18 each including a variable voltage tuning element.
-TV broadcast wave signal and AM broadcast wave signal are extracted. The tuning circuits 16 and 18 are supplied with control voltage signals from the LPF 40 for adjusting the tuning circuits 16 and 18, respectively. The FM / TV broadcast wave signal and the AM broadcast wave signal are supplied to RF (high frequency) amplifiers 20 and 2.
2 to the mixer circuits 24 and 26, respectively. A local oscillation signal is given from the VCO 36 to the mixer circuits 24 and 26, and after being frequency-converted into an IF (intermediate frequency) signal, the detection circuit 30 is passed through the IF amplifier 28.
Given to. Then, 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, and 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 supplied to the PLL circuit 38 is set by the CPU 44 via the port 42. The PLL circuit 38
VCO 36 to AMVCO or F depending on the port
Switch to MVCO.

The CPU 44 is connected to the ROM 4 via the bus 46.
8 and RAM 50 are connected. As shown in FIG. 2 and Tables 1 to 6, the ROM 48 previously stores, as a list, transmission frequency data of FM and AM broadcasting stations in various regions such as Sapporo, Tokyo, Nagoya, Osaka, Hiroshima, and Fukuoka. .

[0012]

[Table 1]

[0013]

[Table 2]

[0014]

[Table 3]

[0015]

[Table 4]

[0016]

[Table 5]

[0017]

[Table 6]

The RAM 50 is, for example, FM broadcast and A
The preset areas (1) to (10) for storing the transmission frequency data of the M broadcast and the work area are included. In the preset areas (1) to (10), the transmission frequency data of the broadcasting stations of the respective regions stored in the ROM 48. Transmission frequency data of a broadcasting station in an arbitrary region (Osaka in the example shown in Table 4) is read out and stored. Further, the work area of the RAM 50 stores the transmission frequency data currently being received. The CPU 44 also includes a bus 46 and a port 52.
A key input unit 54 including, for example, a ten-key pad, a memory key, a band key, and an up / down key (neither is shown) is connected to the CPU 44. LCD58
Are connected.

In operation, as shown in FIG. 3, when the power is first turned on in step S1, the CPU 44 issues a command to store the initial area data in the RAM 50, which is a preset memory, and the initial area data is set in the RAM 50. To be done. As the initial area data, the transmission frequency data of the broadcasting stations 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. Succeedingly, in a step S3, it is determined whether or not there is a key input, and if there is no key input, it stands by, and if there is a key input, a step S5.
At that time, one of the subroutines shown in FIGS. 4 to 7 is called.

First, if there is a ten-key input in step S3, the preset reception mode is entered as shown in FIG. 4, it is determined in step S7 that there is ten-key input, and in step S9, the work areas of RAM 50 are preset areas (1) to (1). Among the resonance frequency data stored in (10), the transmission frequency data corresponding to the numeric keypad input 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, PLL data is set in the PLL circuit 38, then in step S17, 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, the area setting mode is entered as shown in FIG.
In step S19, it is determined that the memory key has been pressed. For example, as shown in FIG.
The display blinks for about 10 seconds. Then, 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. It 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 the LCD 58. In this way, the desired area to be set is displayed. In step S25, each time the band key is pressed, as shown in order from FIG. 8 to FIG. 13,
SA (Sapporo) → TO (Tokyo) → NA (Nagoya) → OS
(Osaka) → HI (Hiroshima) → FU (Fukuoka) → SA (Sapporo)
→ ... The areas displayed on the LCD 58 are 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 is stored in the ROM 48 in step S31. RAM for transmitting frequency data of broadcasting stations in the desired area
It is written in 50 preset areas. Then, the PLL data is created in step S33 shown in FIG.
In step S35, the display data is created, and the display data shown in FIG.
Return to step S15. Note that step S
21 and step S29, if the band key and the memory key are not pressed while the [PGM] display is blinking, the process proceeds to step S33.

Further, in step S3,
If there is a down key input, the preset area rewriting mode is entered as shown in FIG. 7, and after the desired station is received by the up / down key in step S37,
When the memory key is pressed in step S39, the reception frequency is displayed on the LCD 58 as shown in FIG.
M] display blinks for about 10 seconds. And step S4
In Fig. 1, if 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. 15, and the RAM 50 of the RAM 50 is displayed in step S43. The work area data is stored in the corresponding preset area (preset area (4) in this embodiment). At this time, if the previous data is stored in this preset area, the previous data is changed to new transmission frequency data, and if not, the transmission frequency data is added. Then, after the display data is created in step S45, the process returns to step S17 in FIG. Note that step S4
If the ten key is not pressed while the [PGM] display is blinking in 1, the process proceeds to step S45.

[Brief description of drawings]

FIG. 1 is a block diagram showing an 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 this embodiment.

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

FIG. 5 is a flowchart showing a subroutine of a region setting mode.

FIG. 6 is a flowchart showing a continuation of the operation of FIG.

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 an LCD.

FIG. 9 is an illustrative view showing a state where the LCD is displayed in Tokyo.

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

FIG. 11 is an illustrative view showing a state where the LCD is displayed in Osaka.

FIG. 12 is an illustrative view showing a state where the LCD is displayed in Hiroshima.

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 rewriting completed state of a preset area.

[Explanation of symbols]

 10 ... Radio receiver 44 ... CPU 48 ... ROM 50 ... RAM 54 ... Key input section 58 ... LCD

Claims (1)

[Claims] 1. A radio receiver comprising: a first memory for storing a list of transmission frequencies of respective broadcasting stations in advance; and a second memory for reading out and storing transmission frequencies of broadcasting stations in a desired area from the first memory. 3. The radio receiver according to claim 1, further comprising a rewriting unit that rewrites the transmission frequency stored in the second memory so as to match the usage state.