JPH10233655A - Synthesizer receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the user to easily understand a preset state visually. SOLUTION: In the case that an optional channel selection key Kk among channel selection keys K1-K8 is operated, frequency data written in a data area corresponding to the operated channel selection key Kk are read. A reception frequency fRX of a reception circuit 10 is set to a frequency denoted by the frequency data. In the case of a preset, frequency data written in each data area of a memory 34 are read. The reception frequency corresponding to the read frequency data is displayed on a display element 50 in cross reference with the channel selection keys K1-K8. In the case that any of the displayed channel selection keys K1-K8 is selected and a prescribed key operation is made, the frequency data corresponding to the reception frequency fRX at that time are written in the data area corresponding to the selected channel selection key Kk among the data areas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Generally, a receiver of a synthesizer system using a PLL can preset a broadcasting station to a tuning key, and when the tuning key is pressed, the broadcasting station is preset to the pressed key. Broadcasting stations can be selected with one touch.

In this case, the preset is to write the data of the reception frequency, for example, the frequency division ratio of the variable frequency dividing circuit of the PLL, to the address of the memory corresponding to the tuning key. Tuning is realized by reading the frequency division ratio from the address corresponding to the depressed tuning key and setting it in the variable frequency dividing circuit. The number of tuning keys is generally about 5 to 9 keys.

[0004]

However, in the conventional receiver of the synthesizer system, since the current preset state or the like is not visualized, the operation when performing the preset tends to be difficult to understand. For this reason, at the time of presetting, for example, there is a case where another broadcasting station is overwritten on a tuning key which has already been preset.

[0005] The present invention is to solve such a problem.

[0006]

For this reason, according to the present invention, there is provided a synthesizer type receiving circuit in which a reception frequency is set to a frequency indicated by frequency data, a plurality of tuning keys, and a plurality of tuning keys. Each of the data areas has a corresponding memory and a display element, and when an arbitrary one of the plurality of tuning keys is operated, the selected one of the data areas is operated. The frequency data written therein is read from the corresponding data area, and the received frequency of the receiving circuit is set to the frequency indicated by the read frequency data according to the read frequency data. Reads the written frequency data, and associates the reception frequency corresponding to the read frequency data with the plurality of tuning keys. When displayed on the display element and one of the displayed tuning keys is selected and a predetermined key operation is performed, frequency data corresponding to the reception frequency at that time is stored in the data area in the data area. This is a synthesizer receiver designed to write in the data area corresponding to the selected tuning key. Therefore, the tuning key and the reception frequency preset to the tuning key are displayed on the display element in a list format, and the frequency data of the current reception frequency is preset to the designated tuning key among them. .

[0007]

FIG. 1 shows one embodiment in which the present invention is applied to an FM receiver capable of receiving DARC type FM teletext broadcasting.

That is, reference numeral 10 denotes an FM receiving circuit configured in a synthesizer system. A receiving signal from an antenna 11 is supplied to an antenna tuning circuit 12 of an electronic tuning system, and a broadcast wave signal SRX of a target frequency fRX is supplied. Is taken out.

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

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

At this time, the VCO 21 is connected to the circuit 2
Together with 2 to 25, the PLL 20 is configured. That is, the signal SLO from the VCO 21 is supplied to the variable frequency dividing circuit 22 to divide the frequency into 1 / N, and the frequency-divided signal is supplied to the phase comparing circuit 23 and the oscillation circuit 24
An oscillation signal having a reference frequency, for example, a frequency of 100 kHz is taken out from the VCO 21 through a low-pass filter 25.
Is supplied as the control voltage. Also, the filter 25
Is supplied to the tuning circuit 12 as a tuning voltage.

Therefore, in the steady state, the frequency of the frequency-divided signal from the frequency-dividing circuit 22 and the frequency of the oscillation signal of the oscillation circuit 24 are equal, and the frequency fLO of the oscillation signal SLO at this time is fLO = N × 0.1 [MHz] ··· (2), and from equations (1) and (2), fRX = fLO + fIF = N × 0.1 + 10.7 [MHz] ···
(3)

Therefore, the frequency dividing ratio N is set to 653-793.
, The local oscillation frequency fLO
However, since the frequency changes between 65.3 MHz and 79.3 MHz at intervals of 100 kHz, the reception frequency fRX changes the frequency band of 76.0 MHz to 90.0 MHz in a frequency step of 100 kHz and corresponds to the dividing ratio N. Will change.

The demodulated signal from the demodulation circuit 14 is supplied to the decoder circuit 19, and the data of the text program in the FM text multiplex broadcasting of the DARC system is decoded and error-corrected and taken out.

Further, the FM receiver is provided with a microcomputer 30 for system control. This microcomputer 30 includes a CPU 31 and
ROM 32 for program and RAM for work area
33, a memory 34 for holding data, and a RAM 35 for a buffer for receiving a text program. And memory 3
2 to 35 are connected to the CPU 31 through the system bus 39.

In this case, the ROM 32 has, for example, a preset routine 100 shown in FIG. 2 and also has character data necessary for screen display. The details of the preset routine 100 will be described later.

The memory 34 is a ROM capable of electrically erasing and writing data.
Alternatively, although not shown, the battery is 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. 3, the memory 34 has, for example, data areas A1 to A8 for eight stations corresponding to channel selection keys to be described later, and the data areas A1 to A8 respectively. The data of the frequency of the broadcasting station preset in the tuning key, for example, the frequency division ratios N1 to N8
Can be memorized.

The bus 39 has ports 36 and 37.
And an interface circuit 38 are connected. Then, the frequency division ratio N is set in the variable frequency dividing circuit 22 from the CPU 31 through the port 36, and channel selection and reception of the receiving circuit 10 are executed. When receiving a text broadcast, the data of the text program from the decoder circuit 19 is stored in the reception buffer RAM 35 through the port 37. Further, the interface circuit 38 includes various operation keys K
D to KM are connected to, for example, eight tuning keys K1 to K8. The keys KD to K8 are constituted by non-lock type push switches.

Further, a font ROM (character generator) 41 having font data for converting character data transmitted by FM character multiplex broadcasting into display data is connected to the bus 39, and a display controller 42 is connected to the bus 39. It is connected. The controller 42 is connected with a display memory 43 and, for example, an LCD 50 as a display element. In this case, the LCD 50 displays characters and the like by a combination of dots, and has a size of, for example, 256 horizontal dots × 200 vertical dots as shown in FIG. 4A.

Further, the memory 43 is a bit map system corresponding to the dot display system of the LCD 50,
It has a capacity of 50 screens. The character data held in the reception buffer RAM 35 or the data prepared in advance in the ROM 32 is
The data read by the PU 31 is converted into display data using the font data in the ROM 41, and the display data is written to the memory 43 through the controller 42.

At this time, the display data of the memory 43 is repeatedly read out by the controller 42, converted into a display signal, and supplied to the LCD 50. In this manner, the LCD 31 has the CPU 31
5 or character by character data read from RO
Characters based on character data prepared in M32 are displayed.

In such a configuration, various processes are performed by C
This is executed by the PU 31 as follows.

[Manual channel selection] When the frequency down key K- or the frequency up key K + of the operation keys KD to KM is pressed in the reception state of an arbitrary frequency, a variable frequency dividing circuit is generated each time the key is pressed. 22 is decreased or increased by “1”, and as a result, the reception frequency f
RX is lowered or raised by 100 kHz.

Therefore, when the frequency down key K- or the frequency up key K + is pressed, an arbitrary frequency can be selected by manual operation.

[Preset of Broadcasting Station] This is a case where the broadcasting stations are preset to the tuning keys K1 to K8, respectively. This preset is realized by the CPU 31 executing the preset routine 100.

That is, when the receiver is in a receiving state of an arbitrary frequency, the preset key KP among the operation keys KD to KM is set.
When the button is pressed, the processing of the CPU 31 starts from step 101 of the routine 100. Next, in step 102, the frequency division ratios N1 to N8 held in the data areas A1 to A8 of the memory 34 are copied to the RAM 33 and saved. Then, in step 103, predetermined data is supplied to the memory 43 through the controller 42,
For example, as shown in FIG.
The frequencies fRX to fRX preset in 1 to K8 are displayed in a list format (menu format).

FIG. 4A shows a set of characters indicating a tuning key Kn (n = 1 to 8), for example, a number "n", and a frequency fRX preset for the tuning key Kn. Are displayed line by line. At this time, the displayed frequency fRX is obtained by reading the division ratio Nn stored therein from the data area An of the memory 34, and converting the read division ratio Nn to the frequency fRX according to the equation (3). It is converted.

Further, on the LCD 50, below the row of the eighth tuning key K8, a row of numbers "9" and "registration end" to which the tuning key Kn does not correspond is displayed. , A frame 51 is displayed, and the currently selected frequency (frequency of the receiving broadcasting station) fR is displayed in the frame 51.
X, for example, “81.3 MHz” is displayed. Further, the number "1" indicating the first channel selection key K1 is displayed as a reverse display meaning a cursor (in FIG. 4, the reverse display is shown by diagonal lines for convenience of drawing; the same applies hereinafter). It is informed that station key K1 is to be processed further.

Subsequently, the process proceeds to step 111, where the process waits for a key input. Then, when the down key KD or the up key KU of the operation keys KD to KM is pressed while waiting for this key input,
The process proceeds from step 111 to step 112, and the key input in step 112 is determined.

In this case, since the key is the down key KD or the up key KU, the process proceeds from step 112 to step 121. In this step 121,
The cursor (inverted display) displayed on the LCD 50 is
Moved one line down or up. For example, FIG.
When the down key KD is pressed in the state shown in FIG.
As shown in B, the cursor moves to the number "2" one line below, and it is notified that the second tuning key K2 has been subjected to the subsequent processing.

Then, the process returns to step 111 following step 121, and waits for a key input again. Therefore, when the down key KD or the up key KU is pressed, the numbers "1" to "1" displayed on the LCD 50 are displayed.
The cursor can be moved to an arbitrary number of “9”, and the channel selection key Kn or “registration end” at the cursor position can be set as a target of the subsequent processing.

Then, as shown in FIG. 4B, for example, when the enter key KE is pressed while the tuning key K2 is selected, the process proceeds from step 111 to step 112, where it is determined that the input is the enter key KE. Processing is Step 1
From step 12, the process proceeds to step 141, and in this step 141, it is determined where the cursor is located among the numbers "1" to "9".

When the cursor is positioned at any one of the numbers "1" to "8", the process proceeds to step 141.
4B, for example, in the case of FIG. 4B, since the cursor is located at the number "2", the frequency division ratio N2 of the data area A2 of the memory 34 corresponds to the reception frequency 81.3 MHz at this time. Is rewritten to the dividing ratio 706. That is, in step 142, the memory 34
Of the data area A1 to A8, the division ratio Nk of the area Ak corresponding to the number k (k = 1 to 8) where the cursor is located at that time is determined by the reception frequency fRX at that time.
Is rewritten to the frequency division ratio N.

Therefore, the reception frequency fRX at that time is newly preset in the tuning key Kk.
Alternatively, the reception frequency fRX preset in the tuning key Kk has been updated to the reception frequency fRX at that time. At this time, for example, as shown in FIG.
The update result is displayed on the CD 50. Then, the process returns to step 111 and waits for a key input again.

Then, when the cursor is positioned at the number "9" by the down key KD and then the enter key KE is pressed, the process proceeds from the step 111 to the step 141 through the step 112. In this case, the cursor is changed to the number "9". 9 ”, the process proceeds from step 141 to step 199, and this routine 100 ends. Thus, an arbitrary reception frequency fRX can be preset for an arbitrary tuning key Kk.

In step 111, when the frequency down key K- or the frequency up key K + is pressed while waiting for key input, the variable frequency dividing circuit 22 is pressed each time the key is pressed, as in the case of [manual channel selection]. Is decreased or increased by "1", and as a result, the reception frequency fRX is decreased or increased by 100 kHz. Further, the reception frequency fRX at that time is displayed in the frame 51. Then, thereafter, the process returns to step 111,
It waits for key input again.

Therefore, presetting can be continuously performed for a plurality of tuning keys K1 to K8 without ending the routine 100. Further, even when the reception frequency fRX or the tuning key Kk is incorrect, the errors can be corrected without terminating the routine 100.

Further, in step 111, if the user presses the cancel key KC among the operation keys KD to KM while waiting for a key input, the process proceeds from step 111 to step 112, where it is determined that the key is the key KC. Goes from step 112 to step 151. In this step 151, the frequency division ratios N1 to N1 copied (saved) in the RAM 33 in step 102 are stored.
N8 are written into the data areas A1 to A8 of the memory 34, respectively, so that the division ratios N1 to N8 of the data areas A1 to A8 are returned to the values before the execution of the routine 100. Proceeding to 199, the routine 100 ends.

Therefore, when the cancel key KC is pressed, the preset which should have been updated in steps 111 to 142 can be canceled.

[Tuning of Preset Broadcasting Station] When any of the tuning keys K1 to K8 is pressed in the receiving state of an arbitrary frequency, the data areas A1 to A8 of the memory 34 are pressed. The division ratio Nk written therein is read from the data area Ak corresponding to the pressed tuning key Kk, and the read division ratio Nk is passed through the port 36 to the variable frequency dividing circuit. Set to 22.

Accordingly, the reception frequency fRX becomes a frequency corresponding to the frequency division ratio Nk thus read out, that is, the broadcasting station preset by the tuning key Kk is selected.

[Display of Character Program] This is a case where a target character program is displayed. Here, FIG. 5F
In the following, an example will be described in which “Kanagawa Weather” is displayed as shown in FIG. Further, in FIG. 5, only the upper half of the LCD 50 is shown for the sake of space.

That is, in this case, a broadcast station which is broadcasting the target text program is selected by [preset selection]. Then, the character program data is decoded and error-corrected from the decoder circuit 19 and taken out.
This data is transmitted through port 37 to the RA for the reception buffer.
It is stored in M35.

When a certain amount of data is accumulated, or when a menu key KM among the operation keys KD to KM is pressed, the character data in the RAM 35 is read according to the character data in the RAM 35.
For example, as shown in FIG.
The following pages are displayed over 10 lines. At this time, the "1. program information" on the first line is displayed in reverse video meaning a cursor (in FIG. 5, for convenience of drawing,
The reverse display is shown by oblique lines. Hereinafter the same).

When the down key KD is pressed, the display position of the cursor changes each time the down key KD is pressed, as shown in FIG. 5A → FIG. 5B → FIG.
The state changes to C →, and the display of the total table of contents is scrolled. It should be noted that when the up key KU is pressed, the state changes in a manner opposite to that when the down key KD is pressed.

In this case, since the purpose is to display a weather forecast, for example, as shown in FIG. 5C, “3.
When the cursor is positioned at the key, the enter key KE is pressed. Then, for example, as shown in FIG. 5D, the first page and the second page of the menu of “3. Weather forecast” are displayed, and the cursor is displayed on the first line.

Then, the down key KD is further pressed.
Then, for example, as shown in FIG. 5E, a cursor is displayed at "Kanagawa Weather" on the second line.
Pressing displays the first and second pages of "Kanagawa Weather", for example, as shown in FIG. 5F. At this time, since there is no lower hierarchy, the cursor is not displayed.

Since the display of FIG. 5F is the target character information, the key operation related to the display is completed. Even if any menu or page is displayed, pressing the menu key KM returns the display to the menu one level higher.

As described above, when displaying a text program, the down key KD, the up key KU and the enter key K
All you have to do is key E.

[Summary] As described above, according to the above-described receiver, when performing presetting, the numbers "1" to "8" indicating the tuning keys K1 to K8 and the tuning keys K1 to K8 are assigned to the numbers. Preset reception frequencies fRX to fRX are displayed in a list format, so when presetting a new reception frequency fRX, it is easy to set a preset tuning key for unnecessary reception frequencies fRX. And
The new reception frequency fRX can be surely overwritten.

Alternatively, the preset reception frequency fRX
→ Select the tuning key of the preset destination → Decide to perform the presetting while visually checking the reception frequencies fRX to fRX preset to the tuning keys K1 to K8. it can.

Further, it is possible to know at a glance which receiving frequency is preset for which tuning key without selecting a channel. Further, a plurality of reception frequencies can be continuously preset for each tuning key. In addition, the preset can be canceled on the way.
Further, since the LCD 50 is also used for displaying a text program by teletext broadcasting, it is not necessary to provide the LCD 50 again for presetting.

[Others] In the above description, it is also possible to proceed to step 111 after step 151. In step 131, the frequency division ratios N1 to N8 saved in the RAM 33 are rewritten.
When the process proceeds from step S199 to step S199, the frequency division ratios N1 to N8 of the RAM 33 can be transferred to the data areas A1 to A8 of the memory 34. At that time, step 1
51 becomes unnecessary.

In the above description, the receiving circuit 10
In the case of receiving M broadcast, the same configuration can be applied to the case of receiving AM broadcast or television broadcast.

[0056]

According to the present invention, when a new reception frequency is preset, a new reception frequency can be easily and reliably overwritten on a preset tuning key of an unnecessary reception frequency. it can. Alternatively, presetting can be performed while visually checking the reception frequency preset in the tuning key.

[Brief description of the drawings]

FIG. 1 is a system diagram illustrating one embodiment of the present invention.

FIG. 2 is a flowchart illustrating one embodiment of the present invention.

FIG. 3 is a diagram showing one form of memory contents.

FIG. 4 is a diagram showing one form of display content.

FIG. 5 is a diagram showing one form of display content.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Reception circuit, 14 ... Mixer circuit, 15 ... Intermediate frequency circuit, 16 ... FM demodulation circuit, 19 ... Decoder circuit, 20 ...
PLL, 21 VCO, 22 variable frequency dividing circuit, 30 microcomputer, 31 CPU, 32 ROM (for programs and data), 34 memory (for holding data), 35 for receiving buffer, 41 font ROM,
42 display controller, 43 memory (for display), 50 LCD, 100 preset routine, K
D to K8 ... operation keys

Continuation of the front page (72) Inventor Tsuyoshi Yamanoi 1-7-35 Tsurusehigashi, Fujimi-shi, Saitama 2nd floor of Shinko East Building Phoenix Engineering Co., Ltd. (72) Inventor Tamaki Maeno 6 Kita Shinagawa, Shinagawa-ku, Tokyo Chome 7-35 Inside Sony Corporation

Claims (2)

[Claims] A receiving circuit of a synthesizer system in which a reception frequency is set to a frequency indicated by frequency data; a plurality of tuning keys; a memory having a data area corresponding to each of the plurality of tuning keys; When an arbitrary tuning key among the plurality of tuning keys is operated, a frequency written from a data area corresponding to the operated tuning key in the data area is written in the data area. The data is read, and the receiving frequency of the receiving circuit is set to the frequency indicated by the read frequency data according to the read frequency data. At the time of presetting, the frequency data written in each data area of the memory is read, and the read is performed. The reception frequency corresponding to the frequency data is
A frequency corresponding to the reception frequency at the time when one of the displayed plurality of tuning keys is selected and a predetermined key operation is performed is displayed on the display element in association with the plurality of tuning keys. A synthesizer receiver in which data is written in a data area of the data area corresponding to the selected tuning key. 2. The synthesizer receiver according to claim 1, wherein at the time of the presetting, a key operation of copying data of a frequency written in each data area of the memory to another data area and canceling the presetting is performed. When done,
A synthesizer receiver wherein the frequency data copied to the other data area is written to each data area of the memory.