JPH08288795A - Synthesizer receiver - Google Patents

Abstract

PURPOSE: To display a broadcasting station name at the time of selecting a preset channel. CONSTITUTION: This synthesizer receiver is provided with a table for data indicating an area, data for the frequency of a broadcasting station to be received in the area and data for the station name of the broadcasting station, a memory 34 from which area data and frequency data are accessed and a display element 46. When 1st key operation is executed, data for the frequency of broadcasting to be received in a current receiving area are written in the memory 34. When 2nd key operation is executed, data indicating the area are selected and written in the memory 34. When a channel selection key is depressed, receiving frequency fRX is changed in accordance with the frequency data written in the memory 34 and the table is referred to by using the frequency data and the area data stored in the memory 34, so that the broadcasting station name data can be read out. The station name of the broadcasting station is displayed on the display element 46 based upon the read data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthesizer receiver.

[0002]

2. Description of the Related Art Generally, a frequency synthesizer type receiver has a preset receiving function, and by presetting frequency data of a broadcasting station, one-touch channel selection can be performed.

[0003]

However, in the conventional synthesizer receiver, even if it has a display function,
It was the frequency of the selected broadcasting station that was displayed.
Therefore, the user has to remember the correspondence between the broadcasting station name and the frequency, which is not convenient.

Therefore, it is possible to display the broadcasting station name, but even in that case, the broadcasting station name must be registered by the user, which is troublesome. Moreover, in a receiver that can be carried or moved, it was necessary to re-register the station name at the carrying destination or the moving destination, which was even more troublesome.

The present invention is intended to solve such a problem.

[0006]

Therefore, according to the present invention, the frequency of the received signal is converted by the output signal of the PLL, and the frequency division ratio of the variable frequency divider circuit in the PLL is changed to obtain the received frequency. In the synthesizer receiver configured to change the, the data indicating the area, the frequency data of the broadcasting station that can be received in the area,
It has a table of data of the station name of the broadcasting station, a memory for accessing the data of the region and the data of the frequency, and a display element. When the frequency data of the broadcast that can be received at the receiving location is written in the memory and the second key operation is performed, the data indicating the area is selected and written in the memory and the tuning key is operated. In this case, the reception frequency is changed according to the frequency data written in the memory, and the table is referred using the frequency data and the area data written in the memory. Causes the station name data of the broadcasting station corresponding to the frequency data and the area data written in the memory to be read, and the read station name On the display device by the data, it is an the synthesizer receiver as station name of the broadcast station of the changed reception frequency is displayed.

[0007]

[Function] When the tuning key is pressed, tuning is performed according to the frequency data set in the tuning key,
Broadcasting station name data is selected based on the frequency data and region data, and the broadcasting station name is displayed based on the selected data.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The example shown in FIG. 1 is a case where up to 10 FM stations can be preset, which has an FM receiving circuit 10 configured in a frequency synthesizer system.

That is, the received signal from the antenna 11 is supplied to the antenna tuning circuit 12 of the electronic tuning system, and the broadcast wave signal SRX of the target frequency fRX is taken out.

This signal SRX is the high frequency amplifier 1
3 to the mixer circuit 14 and VC
The frequency fLO is, for example, fLO = fRX−fIF [kHz] ... (1) fIF is an intermediate frequency, and an oscillation signal SLO of fIF = 10.7 MHz is extracted from O21, and this signal SLO is output to the mixer circuit 14. The signal SRX is supplied as a local oscillation signal and frequency-converted into an intermediate frequency signal SIF (intermediate frequency fIF).

Further, the intermediate frequency signal SIF is supplied to the FM demodulation circuit 16 through the intermediate frequency amplifier 15 to demodulate the audio signal, and this signal is supplied to the speaker 18 through the amplifier 17.

At this time, the VCO 21 has the circuit 2
The PLL 20 is configured with 2 to 25. That is, the signal SLO from the VCO 21 is supplied to the variable frequency dividing circuit 22 and divided into a frequency of 1 / N. This frequency divided signal is supplied to the phase comparison circuit 23 and the oscillation circuit 24.
An oscillation signal having a reference frequency, for example, a frequency of 100 kHz is extracted from the VCO 21 and the oscillation signal is supplied to the comparison circuit 23.
Is supplied as its control voltage. In addition, the filter 25
Output voltage is supplied to the tuning circuit 12 as a tuning voltage.

Therefore, in the steady state, the frequency-divided signal from the frequency-dividing circuit 22 and the oscillating signal of the oscillating circuit 24 have the same frequency. Therefore, the frequency fLO of the oscillating signal SLO at this time is fLO = N × 0.1. [MHz] ... (2), and from formulas (1) and (2), fRX = fLO + fIF = N × 0.1 + 10.7 [MHz].

Therefore, if the frequency division ratio N is changed by "1" between 653 and 793, the local oscillation frequency fLO
However, the frequency fRX varies between 65.3 MHz and 79.3 MHz in 100 kHz frequency steps.
That is, the frequency band of 76 MHz to 90 MHz is changed in 100 kHz frequency steps and in accordance with the frequency division ratio N.

Further, the receiver has a microcomputer 30 for system control. This microcomputer 30 has a CPU 31, a ROM 32 in which various processing routines are written, a work area RAM 33, and a memory 34 for storing various data, and these memories 32 to 34 are a system. It is connected to the CPU 31 through the bus 39.

In the ROM 32, as a part of the processing routine, for example, the auto preset routine 100 shown in FIG. 5, the manual preset routine 200 shown in FIG. 8, the area name registration routine 300 shown in FIG. 9, and the FIG.
A preset reception routine 400 shown in is prepared.

Further, the ROM 32 has, for example, an area table TKTBL as shown in FIG. 2 and a broadcasting station table FMTBL as shown in FIG.

In this case, the area table TKTBL is a correspondence table between the area name data TKDT and the area code TKCD.
The area name data TKDT is, for example, in units of prefectures,
It is the data showing the prefecture name in JIS code,
This is arranged in the order of AIUEO. The area code TKCD is a code number that specifies the prefecture name.

Further, the broadcasting station table FMTBL is a correspondence table of frequency data, station name data FMNM of the broadcasting station using the frequency, and area name data of the area where the broadcasting station can be received. is there.

In this example, the frequency division ratio N corresponding to the frequency is used as the frequency data, and the station name data FMNM is the data indicating the station name in the JIS code. It is said that. In addition, the region name data is stored in the table TKTBL as the region name.
It is indicated by the area code TKCD when converted by.

For example, the uppermost stage has a frequency of N = 654 (fR
X = 76.1 MHz) is used by "FM Iwate" and "Fukui FM", and shows that these broadcasting stations can be received in Iwate and Toyama prefectures.

In the parentheses, the frequency division ratio N and the frequency fRX corresponding to the area code TKCD and the area name are shown for reference and are not included in the table FMTBL. Also, in the following description, the division ratio N and the area code
When illustrating a TKCD, the corresponding frequency fRX and region name are shown in brackets for reference.

Further, the memory 34 is a ROM capable of electrically erasing and writing data,
Alternatively, although not shown, a RAM backed up by a battery, that is, the memory 34 is a non-volatile memory, and can hold written data even when the power is turned off.

As shown in FIG. 4, for example, a preset table PSTBL having preset areas P0 to P9 for 10 stations is prepared in the memory 34, and each preset area P0 to P9 is divided. The ratio N and the area code TKCD of the area table TKTBL can be stored one by one.

Further, in FIG. 1, the system bus 39
To the output port 41 and the input port 42. Then, the port 41 is connected to the frequency dividing circuit 32, and C
The frequency division ratio N from the PU 31 is set in the frequency division circuit 22 through the port 41.

Further, the detection circuit 19 is provided in the intermediate frequency amplifier 15.
The detection circuit 19 detects the level of the intermediate frequency signal SIF, so that when the reception level of the reception signal SRX is equal to or higher than a predetermined level, the detection signal S19 that becomes "H" is extracted. S19 is taken into the CPU 31 through the port 42.

Further, various operation keys KAP to KEN are connected to the system bus 39 through the interface circuit 43.
T and ten station selection keys K0 to K9 are connected. The keys K0 to K9 correspond to the preset areas P0 to P9 of the preset table PSTBL. Also, keys KAP to K
All 9 are non-locking type push switches.

Further, to the system bus 39, a display memory 45 is connected through a display controller 44, and a display element, LCD 46 in this example, is connected.

When data is supplied to the display controller 44, the controller 44 writes the data in the memory 45 and reads the data at a predetermined cycle, and the read data is converted into display data. The characters are supplied to the LCD 46, and characters (including numbers and symbols) corresponding to the data supplied to the controller 44 are displayed on the LCD 46.

With such a configuration, the microcomputer 30 performs the following processing or operation.

[Auto-preset] This is a case where the broadcasting stations that can be received at the receiving place are automatically preset in the tuning keys K0 to K9 and the data for displaying the broadcasting station name is registered.

In this case, the operation keys KAP to KAP
Press the auto preset key KAP out of 9
The auto preset routine 100 is executed by 31 to preset the broadcasting station to the keys K0 to K9.

That is, when the key KAP is pressed for, for example, 2 seconds or more, the processing of the CPU 31 starts from step 101 of the routine 100, and then, in step 102, the frequency division ratio N of the variable frequency dividing circuit 22 is set to the minimum value. The value is incremented by "1" from 653, whereby the reception frequency fRX is gradually increased in 100 kHz steps.

At this time, by checking the detection signal S19 for each reception frequency, it is checked whether the FM signal SRX can be received at a predetermined level or higher at that reception frequency. The frequency division ratio N giving the reception frequency fRX is written in the areas P0 to P9 of the memory 34 in order as shown in FIG. 6A.

In this way, when the auto preset key KAP is pressed, the FM broadcast wave band is scanned, and if there is an FM station with the specified reception level, the frequency division ratio N corresponding to the broadcast frequency is
Are registered in the memory 34.

When the reception level is checked for the entire FM broadcast wave band, or when the division ratio N is written in all the areas P0 to P9 of the memory 34, the process proceeds to step 103. In this step 103, when the up key K + of the operation keys KAP to K9 is pressed, the area name data TKDT is read from the area table TKTBL in the forward order (direction in which the area code TKCD increases), and The read area name data TKNM is supplied to the controller 44.

Therefore, as shown in FIGS.
On the CD 46, the area name based on the area name data TKDT is displayed in order of AIUEO each time the up key K + is pressed.

When the down key K-of the operation keys KAP to K9 is pressed, the area name data TKDT is read out from the area table TKTBL in the reverse order (in the direction in which the area code TKCD is decreased), and is read out. Area name data TK
NM is supplied to the controller 44. Therefore, LC
In D46, the area name based on the area name data TKDT is displayed in the reverse order of AIUEO every time the down key K is pressed.

Thus, when the key K + or K- is pressed,
The area name is sequentially selected and displayed on the LCD 46. If the area name you are currently in is displayed, press the key K.
Press the enter key KENT from AP to K9.

Then, the processing of the CPU 31 is step 10
From step 3 to step 104, in step 104, as shown in FIG. 6B, the area code TKCD corresponding to the area name selected in step 103 is determined by the step 102 among the areas P0 to P9 of the memory 34. Ratio N
Will be registered in all registered areas.

FIG. 6B shows the case where the area is "Tokyo".
Therefore, this is the case where "26" is registered as the area code TKCD indicating "Tokyo".

When this area code TKCD is registered, the processing of the CPU 31 proceeds to step 105, and this routine 100 is ended.

Therefore, when the auto preset key KAP is pressed, the frequency division ratio N of the receivable frequency is automatically registered in the memory 34, and the area code TKCD of the area name selected by the user is also registered. It

[Manual Preset] This is mainly for presetting an arbitrary broadcasting station to one of the tuning keys K0 to K9.

In this case, first, the broadcasting station to be preset is selected in advance by the method described later. Then, next, the tuning key Ki (i = 0 to 9) for which the broadcasting station is desired to be preset is held for, for example, 3 seconds or more.

Then, the processing of the CPU 31 starts from step 201 of the manual preset routine 200, and then at step 202, the area corresponding to the pressed tuning key Ki among the areas P0 to P9 of the preset table PSTBL. Pi is the currently received frequency f
The frequency division ratio N of RX (the frequency division ratio N set in the frequency division circuit 22) is written.

Subsequently, the processing of the CPU 31 is step 20.
Then, the routine 200 is terminated.

Therefore, the broadcasting station currently being received can be preset to an arbitrary tuning key Ki.

[Set Region Name] This is a case where the region name is set in order to display the station name of the broadcasting station preset by the above-mentioned [manual preset].

In this case, first, the broadcasting station preset by [manual preset] is selected. This tuning is realized by pressing the tuning key Ki, which will be described later. Further, in the following, the contents of the preset table PRTBL are as shown in FIG. 6B, and by pressing the tuning key K0, the corresponding broadcasting station of N = 657 (fRX = 76.4 MHz) is selected. A case will be described as an example.

Then, the enter key KENT is kept pressed for, for example, 3 seconds or more. Then, the processing of the CPU 31 starts from step 301 of the area name registration routine 300, and next, at step 302, the broadcasting station table FMTB.
Of the L, the column of the frequency division ratio N of the currently received frequency fRX (the frequency division ratio N set in the frequency dividing circuit 22) is referred to, and the data FMNM of the broadcasting station name prepared in that column is referred to. Is read.

In the present case, N = 657, and in the column of the frequency division ratio N, "FM Hokkaido", "FM Tochigi", and "Hiroshima FM" are prepared as the data FMNM of the broadcasting station name. Therefore, the data FMNM of the first “FM Hokkaido” is read.

Then, the read data FMNM is supplied to the controller 44, and the LCD 46 displays the data shown in FIG.
As shown in, the characters "FM Hokkaido" are displayed.

Then, the broadcasting station currently receiving is LC
If the station is not the station name displayed in D44, press the up key K +. Then, the next “FM Tochigi” data FMNM prepared in the column of N = 657 is read out and supplied to the controller 44, and the LCD 46 displays the data shown in FIG.
As shown in 0B, the characters "FM Tochigi" are displayed.

In this way, when the up key K + is pressed, the currently received frequency fRX in the broadcasting station table FMTBL is pressed.
Broadcasting station names based on the broadcasting station name data FMNM prepared in the frequency division ratio N (= 657) column are displayed on the LCD 46 in the normal order, and when the key K- is pressed, they are displayed in the reverse order.

When the corresponding broadcasting station name is displayed, for example, "Hiroshima FM" corresponds and "Hiroshima FM" is displayed, the enter key KENT is pressed.

Then, the processing of the CPU 31 is step 30.
From 2 to step 303, in this step 303, the broadcasting station name data FMNM (= Hiroshima FM) used in the display of step 302 and the division ratio N (= 65 at this time)
7) and are used to refer to the broadcast station table FMTBL, and the area code TKCD corresponding to the data FMNM, N, in this case, TKCD = 36 is retrieved.

Next, the processing of the CPU 31 is performed in step 304.
Then, in this step 304, in step 303
The area code TKCD (= 36) fetched in step 3 is the area Pi corresponding to the tuning key Ki operated to select the currently receiving broadcasting station among the areas P0 to P9 of the preset table PSTBL In this case, as shown in FIG. 11, it is written in the area P0 corresponding to the tuning key K0.

After that, the processing of the CPU 31 proceeds to step 305, and this routine 300 ends.

Therefore, according to this routine 300, when the broadcasting station name is selected and displayed on the LCD 46 with the tuning key Ki selected, the area where the reception frequency fRX and the broadcasting station name correspond. The code TKCD will be registered in the area Pi corresponding to the operated tuning key Ki.

[Preset reception] This is the tuning key K0.
This is a case of selecting a channel using K9.

That is, when any one of the tuning keys K0 to K9 is pressed, the processing of the CPU 31 starts from step 401 of the preset reception tuning routine 400, and then, in step 402, the preset table.
Of the areas P0 to P9 of the PSTBL, the frequency division ratio N is read from the area Pi corresponding to the pressed key Ki, and this is PL
It is set in the variable frequency dividing circuit 22 of L20. Therefore, from this point in time, the broadcasting station set in the tuning key Pi can be received.

Subsequently, the processing of the CPU 31 is step 40.
In step 403, the pressed key Ki of the areas P0 to P9 of the preset table PSTBL is selected.
The area ratio TKCD from the area Pi corresponding to
Are read out, the broadcasting station table FMTBL is referred to by using these data N and TKCD, and the data FMNM of the broadcasting station name corresponding to the data N and TKCD is taken out.

For example, the read data N and TKCD are
If N = 657 and TKCD = 36, the data F of “Hiroshima FM” in the preset table FMTBL of FIG.
Since MNM corresponds, the character code of "Hiroshima FM" is taken out as data FMNM.

Then, the extracted data FMNM of the broadcasting station name is supplied to the controller 44, and therefore L
The characters "Hiroshima FM" are displayed on the CD 46, as shown in FIG.

Thus, when the tuning key Pi is pressed, the broadcasting station registered in the key Pi is selected,
The broadcasting station name is displayed on the LCD 46.

[Tuning of Broadcast Stations Not Registered] This is a case of selecting a broadcast station not registered in the preset table PSTBL.

In this case, the key K + or K- is pressed for a very short period while selecting an arbitrary broadcasting station. Then, each time the key K + or K- is pressed, the frequency division ratio N of the frequency division circuit 22 is incremented or decremented by "1", and the reception frequency fRX becomes 100.
It goes up or down in steps of kHz. Therefore, by shortly pressing the key K + or K-, the reception frequency fRX can be set to an arbitrary frequency.

If the key K + or K- is kept pressed for, for example, 1 second or longer, the frequency division ratio N of the frequency dividing circuit 22 is continuously incremented or decremented by "1", and the reception frequency fRX is increased. It continuously rises or falls in 100 kHz steps. That is, scanning is performed.

If a broadcast can be received when a certain reception frequency fRX reaches a certain frequency, then,
The detection signal S19 becomes "H" level, but this is the CPU3
1, the scanning is stopped at the reception frequency, and then the reception state of the frequency is entered.

Thus, when the key K + or K- is pressed,
Any frequency can be selected or received.

[Summary] According to the receiver described above, it is only necessary to select a region for the preset reception frequency.
When receiving a preset, the station name of the broadcasting station can be automatically displayed. Further, the station name of the broadcasting station can be displayed without knowing the correspondence between the reception frequency and the broadcasting station. Furthermore, the broadcasting station name can be displayed without providing complicated character input.

[0073]

According to the present invention, when the tuning key is pressed,
Tuning is performed by the frequency data set in the tuning key, and the broadcasting station name data is selected by the frequency data and the regional data, and the broadcasting station name is selected by the selected data. Can be displayed.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a diagram illustrating an example of a data table.

FIG. 3 is a diagram showing an example of a data table.

FIG. 4 is a diagram showing an example of a data table.

FIG. 5 is a flowchart showing an example of a part of the present invention.

FIG. 6 is a diagram showing an example of a data table.

FIG. 7 is a diagram showing a display example.

FIG. 8 is a flowchart showing an example of a part of the present invention.

FIG. 9 is a flowchart showing an example of a part of the present invention.

FIG. 10 is a diagram showing a display example.

FIG. 11 is a diagram showing an example of a data table.

FIG. 12 is a flowchart showing an example of a part of the present invention.

FIG. 13 is a diagram showing a display example.

[Explanation of symbols]

 10 reception circuit 12 antenna tuning circuit 14 mixer circuit 15 intermediate frequency amplifier 16 FM demodulation circuit 20 PLL 21 VCO 22 variable frequency divider circuit 30 microcomputer 31 CPU 32 ROM 33 memory 44 display controller 46 LCD 100 auto preset routine 200 manual preset routine 300 Region name registration routine 400 Preset reception routine K + Up key K- Down key K0 to K9 Tuning key KAP Auto preset key KENT Enter key TKTBL Region table FMTBL Broadcast station table PSTBL Preset table

Claims (2)

[Claims] 1. A synthesizer receiver in which a reception signal is frequency-converted by an output signal of a PLL and a reception frequency is changed by changing a frequency division ratio of a variable frequency dividing circuit in the PLL. , A table of data of the frequency of a broadcasting station that can be received in the area, and data of the station name of the broadcasting station, data indicating the area, and a memory to which the data of the frequency is accessed, And a display element, when the first key operation is performed, the data of the frequency of the broadcast that can be received at the current reception location is written in the memory, and when the second key operation is performed, the area is indicated. When data is selected and written to the memory, and the tuning key is operated, the reception frequency is changed according to the frequency data written in the memory. Is changed, and by referring to the table using the frequency data and the region data written in the memory, the frequency data and the region data written in the memory can be dealt with. The data of the station name of the broadcasting station to be read is read, and the read element name data is read by the read element,
A synthesizer receiver in which the station name of the broadcasting station of the above-mentioned changed reception frequency is displayed. 2. The synthesizer receiver according to claim 1, wherein when the third key operation is performed, the data of the frequency for an arbitrary reception frequency is written in the memory and the fourth key operation is performed. At this time, the station names of the broadcasting stations corresponding to the frequency indicated by the data written by the third key operation are sequentially displayed on the display element. When the display is confirmed, the broadcasting station when the display is confirmed A synthesizer receiver in which data indicating an area corresponding to is selected and written in the memory.