JPS632366B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a receiver, and in particular to a receiver that classifies frequency data of broadcast stations in advance based on region, broadcast content, broadcast network, etc., and writes these classified frequency data. The present invention relates to a receiver that facilitates storage of a large amount of frequency data by using a memory device.

BACKGROUND ART Conventionally, car radios and the like have been equipped with a mechanical or electronic memory device, and have been widely put into practical use so that a favorite broadcast station can be selected with a single push of a button. However, the service area in which radio waves transmitted from one broadcasting station can be received is limited, and when driving long distances, it is necessary to retune or reselect another memorized broadcasting station. This made it difficult to use as a receiver used over a wide range. To address this inconvenience, receivers have been devised that allow selection of several stations at once. This type of receiver is configured to be able to receive signals by sequentially switching to a station with a good reception condition from among several selected stations. However, even in a receiver that can select several stations at once, it takes a lot of effort to memorize the frequency data for selection in advance, and the burden placed on the receiver cannot be said to be small. Ta.

Therefore, an object of the present invention is to provide a receiver that facilitates storage of data of many broadcast station frequencies and facilitates writing of frequency data to a receiver memory device regardless of the broadcast service area. It is.

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

To summarize this invention, instead of checking frequency tables and storing frequency data of broadcasting stations in memory, frequency data of broadcasting stations classified in advance based on area, broadcast content, broadcasting network, etc. is stored. By providing a memory device, frequency data of several stations corresponding to data classified by specifying an area code or a broadcast content code can be provided to the receiver memory device at once.

The drawing is a block diagram showing an electric circuit according to an embodiment of the present invention. In the figure, radio waves captured by an antenna 1 are applied to a tuner 2, similar to a conventional receiver. A circuit for controlling tuning, which will be described next, is connected to this tuner 2, and the output signal from the tuner 2 controlled by these circuits is sent to the next stage low frequency amplifier 3 to a desired level. The signal is amplified to a maximum of 100 MHz, and is given to the speaker 4 and output as audio. A tuning voltage generator 8 is connected to the tuner 2 , and generates a predetermined tuning voltage based on a command given from the control device 5 and supplies it to the tuner 2 . The control device 5 includes second memory devices 51 and 5 for storing frequency data selected from a first memory device, which will be described later.
2,53, this second memory device 51,5
The generation of the tuning voltage is controlled based on the frequency data stored in 2 and 53. The control device 5 also includes a selection device 7 corresponding to an operation panel.
is connected to control reading and writing of data stored in the second memory device. Memory selection buttons 71, 72 and 73 provided on the selection device 7 are provided corresponding to the second memory devices 51, 52 and 53. Reference numeral 74 denotes a code designation switch, which is set to an on state when it is desired to store frequency data of a broadcasting station in the second memory device. Reference numerals 75 and 76 are manual frequency switching knobs used to change the frequency. In addition, the knobs 75 and 76 serve as operation knobs for inputting code information when writing frequency data from the first memory device to the second memory device, which will be described later.For example, the knob 75 is used to input the code number upward. The knob 76 is operated to advance the code number, and the knob 76 is operated to advance the code number downward. knob 7
Switching of the functions 5 and 76 is controlled by detecting whether the code designation switch 74 is turned on or off, and based on commands from a control device 5 comprising a microcomputer. A display 77 displays the frequency being received and the code information during the rewriting operation to the memory device.

The receiver according to the present invention includes, in addition to the second memory devices 51, 52, and 53 provided in the control device 5, a first memory device 6 for storing data based on many broadcasting station frequencies. It is provided. In this first memory device 6, frequency-based data is stored in advance, classified and organized by region and broadcast content in this embodiment. Each classified data is assigned a specific code (01 in the figure).
~29) are performed, and for example, the area code is specified in the first digit of each number, the broadcast content code is specified in the second digit, and is written to addresses 601 to 629 of the first memory device,
The number "617" means that the area code is 7 and the broadcast content type code is "1". The numerical codes are shown in the codebook in correspondence with the region and broadcast content type. For example, the code "7" is for the XX region, the code "1" is for the music program, and so on. The region and broadcast content type are displayed. the first memory device 6
The system is not limited to those that use the ROM in the microprocessor, but is also a cartridge type that uses a separate memory device and can be replaced with the receiver, making it possible to use several types in areas where there are many broadcasting stations. By preparing the memory device, the purpose can be achieved with a relatively small capacity memory device.

The receiver is provided with a reception level determination circuit 9 that detects the output of the tuner 2 in order to extract the best station from the selected broadcasting station frequency data,
A reception level comparison circuit 10 is provided for comparing the outputs of the reception level determination circuit 9 and selecting the strongest reception level.

In the receiver having the above structure, the operation when storing broadcast frequency data of code "17" in the selection button 71 of the selection device 7 will be explained first. The code designation switch 74 is turned on to change the mode so that data can be written to the second memory device 51. This mode switching is detected by the control device 5, and accordingly, the display 77, which normally displays the received frequency, changes to displaying the code, and the frequency switching knobs 75 and 76 become code selection knobs. The user reads the frequency data of the broadcast station transmitting the desired broadcast content according to the region as a code from the code table, and turns the knobs 75 and 76 so that the numerical value appearing on the display 77 corresponds to the code. operate. For example, the code is "17"
If the memory selection button 71 provided corresponding to the second memory device 51 is operated with the display 77 displaying the numerical value "17", the control device 5 will display the input value "17". Based on the code, the frequency data classified as "617", which has been written in advance in correspondence with the code "17", is read from the first memory device 6 and is stored in the second memory device 51 in the control device. transferred and stored. The same operation is performed when writing other broadcast station frequency data to the other second memory devices 52 and 53.
By operating the memory selection button 72, the second memory device 52 is operated, and by operating the memory selection button 73, the second memory device 53 is assigned the first memory device corresponding to the input code. The frequency data read from 6 is transferred and stored.
When the memory operation is completed, the code designation switch 74
By switching off, the receiver is placed in a mode for reading frequency data written in the second memory device 51, 52, 53. From now on, the memory selection buttons 71, 72, 73 will be used for the second memory device 5.
1, 52, and 53, and which is written in the second memory device corresponding to the operated memory selection button, is directly read out and given to the tuning voltage generator 8.

However, the pre-classified frequency data stored in the first memory device 6 usually includes frequency data of a plurality of broadcasting stations, and therefore, for example, when receiving a broadcasting station of a certain classification by pressing the memory selection button, The best station can be automatically received by the following operation. That is, a part of the signal output from the tuner 2 is guided to the reception level determination circuit 9,
This level is converted into a digital code of several levels and inputted to the control device 5 and the received level comparison circuit 10. On the other hand, the reception level comparator 10 receives the frequencies of the broadcasting stations stored in the second memory device selected by the memory selection button in sequence, but first receives the reception level of the broadcasting station inputted first. The level is used as a reference input of the reception level comparison circuit 10, and the reception level of the next broadcasting station is used as a comparison input, and the strengths of the two signal levels are compared. The one that exceeds the level as a result is set as a new standard for the reception level comparison circuit 10, and this is sequentially repeated so that the frequency of the broadcasting station input last is relatively the best in the selected second memory device. This is the frequency of the broadcasting station that can obtain the reception status of , and this station is the first receiving station.

The reception level comparison circuit 10 can also be configured to be integrally included in the control device 5. Also, when a certain station is being received, the audio is interrupted for a period of time that does not interfere with the reception, and the reception level of other stations in the same second memory device is detected and the reception level of the station currently being received is detected. It is also possible to always receive stations with relatively strong reception levels by comparing the reception level.

As described above, according to the present invention, a memory device is provided in which broadcast station frequency data is classified and stored in advance, and data belonging to a desired classification is read out from the memory device and is stored in the memory of the control unit in correspondence with a selection button. By storing data in the device, a large amount of frequency data can be built into the receiver, and even when reception conditions change due to long distance driving, the memory contents can be easily written, ensuring the best reception at all times. You can get the status. Further, according to the present invention, when performing tuning according to frequency-based data stored in the memory device (second memory device) of the control unit, the received signal level between each broadcasting station is compared and the most received Since control is performed to tune to a frequency with a high level, it is possible to automatically tune the receiver to a reception frequency with the best reception condition within the set classification range. Therefore, the receiver does not need to switch the receiving frequency in order to search for a broadcasting station with good broadcasting conditions, and the burden on the receiver can be reduced in this respect as well.

[Brief explanation of the drawing]

The figure is an electric circuit block diagram of one embodiment of the present invention. In the figure, 2 is a tuner, 5 is a control device, 5
1, 52, 53 are second memory devices, 6 is a first memory device, 7 is a selection device, 71, 72, 73 are memory selection buttons, 8 is a tuning voltage generator, 9
1 is a reception level determination circuit, and 10 is a reception level comparison circuit.

Claims (1)

[Scope of Claims] 1. A first memory device in which data based on the frequency of a broadcasting station is classified and stored in advance; and an input means for supplying a classification designation signal for data reading to the first memory device. a second memory device that stores data included in the read classification; and a control means that controls tuning according to frequency-based data stored in the second memory device, The control means includes a received signal level determination means and a level comparison device between received signals, and controls tuning to a frequency having a relatively high received level among the frequency data stored in the second memory. A receiver characterized by: 2. The receiver according to claim 1, wherein the first memory device is provided in a replaceable manner.