JPS63267009A - Radio receiver - Google Patents

Abstract

PURPOSE:To prevent a data stored precedingly from being erased even when a broadcast station is newly preset by providing the 1st and 2nd memories storing a frequency division data of a receptible broadcast station. CONSTITUTION:Frequency-division ratio data A-F and electric field strength data a-f for 6 stations are stored in a storage means 61, and an arithmetic means 60 applies processing to the data in a way that they are stored in a memory of a band 2 of the storage means 61 in the order of magnitude of the electric field strength. Similarly, the frequency-division ratios H-L of other five stations are stored in the memory of a band 1. Thus, the data of a local broadcast station are stored in the 1st memory in case of an on-vehicle radio receiver especially and the data of broadcast stations other than the local station are stored in the 2nd memory. Thus, it is not required to apply preset again when the vehicle returns to its home.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a PLL (phase locked loop),
This invention relates to a radio receiver that selects a channel by changing the frequency division ratio set in a PLL divider.

Conventional technology Conventionally, the reception frequency was changed by sequentially changing the frequency division ratio set in the PLL, the frequency division ratio corresponding to the receivable broadcasting station was stored in memory, and the frequency division ratio was stored by operating the preset memory button. 2. Description of the Related Art Radio receivers are known that instantly select a desired broadcast station by calling up a frequency division ratio.

Problems to be Solved by the Invention However, with the auto preset function of the conventional radio receiver described above, when the auto preset function is activated, the previously stored frequency division ratio data is erased and new data is erased. It would have been rewritten as . For example, in a car radio receiver, even if the frequency division ratio data of the broadcast stations that can be received in the area (local area) where the vehicle is normally driven is stored in the memory, if the auto preset function is activated when the car is driven far away, the memory The frequency division ratio data of the local broadcast station that was stored in the computer was erased and rewritten with new frequency division ratio data, and when the user returned to his hometown, he had to activate the auto preset function again. .

The present invention solves the above conventional problems, and provides a radio receiver in which data previously stored in memory is not erased even if a new broadcasting station is preset. be.

Means for Solving the Problems In order to achieve the above object, the present invention provides a first... a second memory, and these first . The present invention is characterized by comprising memory selection means for selecting one of the second memories.

Function As described above, in the present invention, the first. having a second memory;
These memories can be selectively used, so for example, in the case of a car radio receiver, the first memory stores frequency division ratio data for local broadcast stations, and the second memory stores frequency division ratio data for non-local broadcast stations. Period ratio data can be stored. Therefore, when the user returns to his/her hometown, there is no need to perform the broadcast station presetting operation again.

Embodiment FIG. 2 shows a front view of an in-vehicle audio device (an integrated device of a radio receiver and a cassette deck) having a built-in radio receiver according to an embodiment of the present invention. In Fig. 2, 1 is the main body of the device, 2 is a power switch, 3 is a dust cover provided in the cassette insertion slot so that it can be opened and closed, 4 is an eject button for ejecting the inserted cassette, and 5a+
5b and 5c are key switches, for example, the key switch 5b is for switching whether to display the time or the received frequency on the display section, which will be described later, and the key switch 5c is for switching the display section, which will be described later. This is for displaying the equalizer characteristics and switching to the equalizer characteristics adjustment mode. Reference numeral 6 denotes a function display section 6 for displaying operable functions, and on the front surface of this function display section 6, a plurality of key switches 7a to 7m made of transparent electrodes are arranged, as shown in FIG. There is. Note that FIG. 2 shows an example of the display in the radio mode, and FIG. 3 shows an example of the display in the cassette deck mode. 8 is the reception frequency, time display, cassette deck running direction display, AM, FM
9 is a characteristic display section that displays spectrum characteristics and equalizer characteristics, and a key switch 7m is arranged in this characteristic display section 9 as shown in FIG. By operating this key switch 7m, the display on the characteristic display section 9 is alternately switched between a spectrum characteristic display and an equalizer characteristic display. Reference numeral 10 denotes a volume adjustment function display section for displaying a volume adjustment function; rVOLJ flashes in the volume adjustment mode, rBALJ flashes in the left/right volume balance adjustment mode, and rFADJ flashes in the front/rear volume adjustment mode. As shown in FIG. 4, this volume adjustment function display section 10 is provided with a key switch 7o for mode switching, and by operating this key switch 7o, the volume adjustment mode and the left/right volume balance adjustment mode are selected. , the front and rear volume adjustment modes are switched sequentially. 11 is a level attenuation display section, and a key switch 7p is arranged in this level attenuation display section 11 as shown in FIG. 4, and by operating this key switch 7.9, the reproduced signal can be attenuated by 20 dB. Can be done.

Note that when attenuating by 20 dB, r-20 dBJ is displayed. Reference numeral 12 denotes an up-down display section for displaying an increase or decrease in volume, and key switches 7q and 7r are arranged in this up-down display section 12, as shown in FIG. 4. The key switch 7q is for increasing the volume, and the key switch 7r is for decreasing the volume.

FIG. 1 shows the configuration of the above embodiment. In FIG. 1, 20 is an electronic tuner, 21 is a cassette deck, 2
2 is an analog switch, and this analog switch 2
2 selects either the audio signal output from the electronic tuner 20 or the audio signal output from the cassette deck 21, and is a control signal output from the cassette deck 21 when a cassette is inserted into the cassette deck 21. Accordingly, the analog switch 22 is switched to the cassette deck 21 side, and the analog switch 22 is switched to the electronic tuner 20 side by a control signal generated when a cassette is ejected from the cassette deck 21. 2a is a band-pass filter group, and this band-pass filter group 2
3 has a center frequency of 63Hz, 125Hz, 250Hz
, 500Hz-IKHz, 3.5KHz, 10KH
It is composed of bandpass filters f1 to f7 of z. The outputs of these bandpass filters (1 to (7) are used to display the spectral characteristics. 24R24L are bandpass filter groups that constitute the right channel and left channel equalizers, respectively. These bandpass filter groups 24R24L are It is composed of a plurality of bandpass filters f1 to f7, each having a different center frequency.25
R25L is an electronic volume group constituting an equalizer for the left channel, and these electronic volume groups 25R25L are composed of a plurality of electronic volumes VRI to VR7 that adjust the output level of the band pass group 24R24L. 26R26L is the right channel, respectively.
This is an analog switch that constitutes the left channel diffie switch, and this analog switch 26R26L
By switching, it is possible to output an acoustic signal without going through an equalizer. 27F is an electronic volume for adjusting the level of the front signal FR/FL of the right and left channels, and 27R is the rear R of the right and left channels.
This is an electronic volume for adjusting the levels of ear signals RR and RL. 213F is a power amplifier that amplifies the front signals FR and FI, and 28R is a power amplifier that amplifies the rear signals RR and RL by one. The front signals FR and FL amplified by the power amplifier 28F are applied to speakers 29FR and 29FL placed on the front right and left sides of the vehicle interior, respectively, and the signal R after being amplified by the power amplifier 28R
R and RL are speakers 29RR located on the right and left sides of the rear side of the vehicle interior, respectively.

29RL. Reference numeral 30 denotes an operation section, and this operation section 30 includes key switches 5a to 5c and 7 in FIG.
It consists of a to 7r. 31 is a display unit, and this display unit 31 includes the function display unit 6, display unit 8, and
It is composed of a characteristic display section 9, a volume adjustment function display section 10, a level attenuation display section 11, and an up/down display section 12. 3
Reference numeral 2 denotes a driver that drives the display section 31.

3a is the electronic tuner 20, cassette deck 21, electronic volume 2SR, 25L, and analog switch 26R.
, 26L, electronic volume 27F.

Central processing unit CPU that controls the 27R1 driver 32
The functions of this CPO 33 will be explained below. 34 is a key processing means, and this key processing means 34 discriminates the key switch operated by the operation unit 30, changes or updates the data stored in the storage means a5, and also controls the timing control means 36. Send key determination results. The timing control means 36 determines the timing of various operations according to the key discrimination result, and controls the storage control means 37, the device selection control means 38, the display control means 39, and the deck control means 40. The storage control means 37 is the storage means 3
Specify the address for writing data to or reading data from 5. The storage means 35 includes data for controlling the electronic tuner 20, data for controlling the cassette deck 21, and data for equalizer control (electronic volumes 25R, 2SL, analog switches 26R, 26L).
control data), electronic polyneme 27F, 27R control data, and driver 32 control data are stored.The data read from this storage means 35 is sent to the display control means, the deck control means 40, and the serial interface 41. be transferred. The device selection control means 38 selects the devices (electronic tuner 20, equalizer electronic polyphony 25R, 25) to which data should be transferred from the CPU 33.
Specify L, analog switch 261.26L, electronic volume 27F, 27R, driver 32).

The data read from the storage means 35 is transmitted to the electronic tuner 20 and the equalizer (electronic volume 251 .
25L), Electronic Polyny 27F.

27R1 driver 32. Further, data for controlling the cassette deck is transferred to the cassette deck 21 via the deck control means. 4a is a timer for managing the time of the timing control means 36; 44 is for A/D conversion of the output of the bandpass filter group 23; This is an A/D conversion means, and the data converted by this A/D conversion means 44 is transferred to the driver 32 via the display control means 39, serial interface 41, and interface 42.

FIG. 6 shows the electronic tuner 20 in FIG. In FIG. 6, 45 is an antenna, 46 is a high frequency amplification circuit, 47 is a mixer circuit, 48 is an intermediate frequency amplification circuit,
49 is a detection circuit; 50 is a multiplexer that separates the output of the detection circuit 49 into left and right signals; 51 is a voltage-controlled oscillator forming a PLL; 62 is a frequency-divider for dividing the local oscillation frequency output from the voltage-controlled oscillator 51. The prescaler 5a is a division means, and the frequency division ratio of this frequency division means 53 is set by the frequency division ratio setting means 54. Reference numeral 55 denotes a phase comparison means for comparing the phases of the output of the frequency dividing means 53 and the output of the reference oscillation means 56, and the signal corresponding to the phase difference outputted from this phase comparison means 55 is passed through a low-pass filter 67 and converted into a DC signal. and is input to the voltage controlled oscillator 51. The voltage controlled oscillator 61 outputs a signal having a local oscillation frequency according to the frequency division ratio set in the division means 53 and is supplied to the mixer circuit 47 . Reference numeral 58 denotes electric field strength SD comparison means, and this SD comparison means 58
A comparison is made to see if there is a signal corresponding to the electric field strength level outputted from 8 that is equal to or higher than a predetermined level. 59, the intermediate frequency f is within a predetermined range (10.686≦fif≦10 in the case of FM)
．． 714MHz, or 450±2KHz for AM).
Counter means set: When it is determined that the intermediate frequency fif is within a predetermined range and the SD comparison means determines that the electric field strength level is equal to or higher than the predetermined level, this electric field strength level is output from the frequency division comparison setting means 54. It is stored in the storage means 61 via the calculation means 60 along with the frequency division ratio. 62 is a timing control means, and this timing control means 62 includes an SD comparison means 68 and an IF counter means 59.
, controls the operation timing of the frequency division ratio setting means 54.

Next, an outline of the operation of the above embodiment will be explained.

Turn power switch 2 to O with no cassette inserted.
When N is pressed, the radio mode is activated, and when the part displayed on the function display section 6 in FIG. 2, for example, the rFMJ display part, is pressed, the corresponding key switch C (key switch 7a) in FIG. The broadcast is received, and ryMJ is displayed on the display section 8, as well as the reception frequency. Further, the characteristic display section 9 displays the level of each frequency band of the phonetic signal. (Spectrum characteristic display) Also, operate the display rTUNEJ section to select the key switch 7d or 7.
Press the amount to select the channel. In addition, the key switch 7d
Or, if you press 71 for a short time, it will be manual tuning, and if you press it for a long time, it will be automatic tuning. Also display r
1J, r2J, rsJ, Us) r5J, r
When one of the key switches 7h to 7m corresponding to 6J is pressed, the preset station is received.

In FIG. 2, when the volume adjustment function display section 10 is pressed once, the volume adjustment mode is entered and rVOLJ flashes. In this state, when the key switch 7q or 7r of the up/down display section 12 is pressed, new data is set in the electronic volumes 27F, 27H, and the volume increases or decreases.

When the key switch 5c is pressed in the state shown in FIG. 2, the equalizer mode is entered and the display is changed to the one shown in FIG. 5. In FIG. 5, for example, when the part corresponding to the display "63" is pressed, the key switch 7a turns ON.
The column corresponding to 63Hz blinks. Here, if you press the key switch 7q or 7r of the up/down display section 12,
The 9'3 Hz level of the equalizer is changed, and the display on the characteristic display section 9 is also switched. Similarly, you can adjust the levels of other frequency bands. After the adjustment, for example, if the display "1" part is pressed for a long time (for example, 2 seconds or more), the adjusted equalizer characteristics are stored in the storage means 35.

Also, if the display "1" part is pressed for a short time, the stored equalizer characteristic data is read out, and this data is set to the electronic volume 25R, 25LK, and the characteristic display section 9 shows a message corresponding to the set equalizer characteristic. can be switched to display.

In the radio mode, when a cassette is inserted, the mode becomes the cassette deck mode, and the display is switched to the one shown in FIG. Here, when the key switches 7a to 7m corresponding to each function displayed on the function display section 6 are operated, deck control corresponding to the display is performed.

Further, in the radio mode or the cassette deck mode, when the key switch 7m arranged in the characteristic display section 9 is operated, the spectrum characteristic display and the equalizer characteristic display are alternately switched.

Next, the auto preset function of the radio receiver, which is a feature of the present invention, will be explained.

In the radio mode shown in FIG. 2, when the auto preset display rPsETJ section is pressed for a predetermined period of time (for example, 2 seconds) or more, a timing signal for auto preset is output from the timing control means 36, and this timing signal is sent to the serial interface 41, the interface 42 to the electronic tuner 20, the electronic tuner 20 starts an auto preset operation, and the display section 8 displays, for example, rFM2J. The electronic device 20 first reads the frequency division ratio data stored in the storage means 61, and sets this frequency division ratio data in the frequency division means 5a. Therefore, a local oscillation frequency signal corresponding to the set frequency division ratio is supplied from the voltage controlled oscillator 61 to the mixer 47, and broadcasting at a predetermined reception frequency can be received. Here, the IF force counter means 59 determines whether the intermediate frequency fif is within a predetermined range, and the SD comparison means 58 determines whether the electric field strength is above a predetermined value. If the intermediate frequency f is within a predetermined range and the electric field strength is greater than or equal to a predetermined value, the frequency division ratio and the electric field strength are stored in the storage means 61. Note that if the first intermediate frequency is not within the predetermined range or the electric field strength is smaller than the predetermined value, the frequency division ratio and the electric field strength are not stored. Next, the above process is repeated by changing the frequency division ratio.

Through the above processing, the storage means 61 stores frequency division ratio data A-F and electric field strength data a=f for six stations, as shown in FIG. Note that the calculation means 60 performs processing so as to store the data in the band 2 memory of the storage means 61 in descending order of electric field strength. As a result, the memory of band 2 shown in FIG. 7 has the strongest electric field strength (field strength a
) stations to the sixth strongest (field strength I) station are stored in order. As described above, the frequency division ratio is changed sequentially, the reception frequency is searched from low to high, and when the data C frequency division ratio, electric field strength) for 6 stations with strong electric field strength are stored, the preset Shift to scan mode. In this preset scan mode, the frequency division ratio data stored in the band 2 memory of the storage means 61 is read out every predetermined time in the order of the strongest electric field strength, and the standby/receive station is changed for a predetermined time. In this preset scan mode, when the desired station is received, if you operate the display rPsETJ section of the function display section 6 for a short time, the preset scan mode will end and reading of the frequency division ratio data from the storage means 61 will stop. Then, the division ratio data corresponding to the desired station remains set in the division means 5a.

FIG. 8 shows the flow in the auto preset mode. In auto preset mode, step 1
Whether the current band is 1 or not (if it is determined to be band 1, the switch is made to band 2 (auto preset mode) in step 2 and the process proceeds to step 3. If it is determined in step 1 that it is not band 1, the process proceeds to step 3, The search is started from the lowest frequency in the band.In step 4, the frequency division ratio data read from the storage means 61 is set in the division means 53, and in step 5, whether or not the frequency division ratio corresponding to the highest received frequency has been set is determined. If it is ``No'', it is determined in step 6 whether the electric field strength SD is greater than or equal to a predetermined value, and then in step 7 it is determined whether the intermediate frequency is within a predetermined range. If the determination is ``YES'', the frequency division ratio and electric field strength at that time are stored in the band 2 memory of the storage means 61 in the order of strength of the electric field in step 8.If the determination is ``NO'' in step 6.7. If so, return to step 4. Change the frequency division ratio sequentially as described above, and proceed to step 4.
- Step 8 is repeated, and as described above, data for six stations are stored in the storage means 61 in descending order of electric field strength. At step 5, the highest grade of oil 'lk IFke) r?
-) When I was given a single beat by Suitachu,
As described above, in step 9 the process moves to a preset scan operation.

Next, manual presetting will be explained. In FIG. 2, when the manual channel selection display section rTUNEJ is pressed, the key switch 7d or 7f is turned on, the manual channel selection mode is entered, and the display section 8 displays, for example, rFMIJ. Each time the key switch 7d or 7g is operated, the frequency division ratio data is sequentially read out from the storage means 61, and the receiving frequency is sequentially changed. When the station you want to memorize is received,
When the display "1" part of the display section 6 is pressed for a predetermined time or longer, the key switch 7h turns ON, and the frequency division ratio (for example, frequency division ratio G) corresponding to the station to be stored is stored in the memory of band 1 in FIG. be done. Similarly, the frequency division ratios H to L of the other five stations can be stored in the band 1 memory. After completing manual printing as described above, one of the displays "1" to "6" (for example, "3") on the function display section 6 in FIG.
) for a short time, the corresponding frequency division ratio! is read out and set in the branch unit 53, the desired station is received, and when the display rFMJ or rAMJ of the function display section 6 in FIG. be exposed.

Although FIG. 7 shows memories for FM bands 1 and 2, the storage means 61 is similarly provided with memories for AM' bands 1 and 2.

In addition, in the above embodiment, as shown in FIG.
Although band 2 is used as a manual print memory and band 2 is used as an auto preset memory, bands 1 and 2 may be used as a manual preset memory, or bands 1 and 2 may be used as an auto preset memory.

Effects of the Invention The present invention has the above-mentioned configuration and has a first memory and a second memory, and one of these memories can be selected and used. Data of broadcasting stations can be stored in a first memory, data of broadcasting stations other than the local area can be stored in a second memory, and there is no need to perform a presetting operation again when returning to the local area.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an audio device equipped with a radio receiver according to an embodiment of the present invention, FIGS. 2 and 3 are front views of the same device, and FIG. 4 shows the arrangement of key switches of the device. 5 is a front view of the same device, FIG. 6 is a block diagram of the same radio receiver, FIG. 7 is a diagram explaining the storage contents of the storage means of the radio receiver, and FIG. 8 is a diagram of the same radio receiver. FIG. 2 is a diagram illustrating an eau de ve' reset operation of the receiver. 1...Device body, 2...Power switch, 3...Dust cover, 4...Eject button, 5a-5c...Key Switch, 6...
...Function display section, 7a-7r...Key switch, 8...Display section, 9...Characteristics display section, 10...Volume adjustment Function display section, 11...
... Level attenuation display section, 12 ... Up-down display section, 20 ... Electronic chinisu, 21 ...
...Cassette deck, 22...Analog switch, 23...Band pass filter group, 24L
, 24R... band pass filter group, 25L...
2SR...Electronic volume group, 26L, 26R
...Analog switch, 27F. 27R...Electronic volume, 28F, 28R.
...Power amplifier, 29FR, 29FL, 29R
R. 29RL...Speaker, 30...Operation unit, 31...Display unit, 32...Driver, 33...Central processing unit, 34・・・・・・
・Key processing means, 35...Storage means, 36...
...Timing control means, 37...Storage control means, 3B...Device selection control means, 39
... Display control means, 40 ... Deck control means, 41 ... ° ... Serial interface,
42...Interface, 43...
Timer, 44...A/D conversion means, 45. Old.
・Antenna, 46...High frequency amplification circuit, 47.
...Mixer circuit, 48...Intermediate frequency amplification circuit, 49...Detection circuit, 50...
Multiplexer, 51... Voltage controlled oscillator, 5
2... Prescaler, 53:... Frequency division means, 54... Frequency division ratio setting means, 55...
・Phase comparison means, 56...Reference oscillation means, 57
......Low pass filter, 58...Field strength comparison means, 59...IF counter means, 6
0...Calculating means, 61...Storing means,
62... Timing control means. Name of agent: Patent attorney Toshio Nakao and 1 other law attorney
. ~Rumor ＼Figure 6: ◇Figure 7

Claims (1)

[Claims] an electronic tuner that changes the reception frequency by changing division ratio data set in a frequency divider that constitutes a PLL (phase rod loop); and first and second tuners capable of storing and reading out the division ratio data. A radio receiver comprising a memory and memory selection means for selecting the first or second memory.