JPS60214624A - Preset tuner - Google Patents

Abstract

PURPOSE:To easily store new tuning data and prevent unnecessary storing operation by deciding on a free channel immediately. CONSTITUTION:A selection switch 14 relays and supplies the output value of a data memory 101 to a register 15 and a selection switch 18 relays and supplies the output signal of a coincidence detecting circuit 16 to a latch circuit 191. The output value of the memory 101 is held in the register 15 and the coincidence detecting circuit 16 decides whether the held value coincides with a reference value from a reference value generating circuit 17 or not. Consequently, when the held value is a value other than a tuning data value and coincides with the reference value, the output level of the circuit 16 goes up and this signal is supplied to a latch circuit 191. When the circuit 191 holds the coincidence detection signal, a driving circuit 201 turns on an LED211. Then, the switch 14 relays and supplies output values of data memories 102, 103....

Description

[Detailed description of the invention] Technical field The present invention relates to a preset tuner.

BACKGROUND TECHNOLOGY Preset cheese is a system that stores tuning data such as frequencies for receiving broadcast radio waves in advance in memory.
Channel selection is performed by reading out the tuning data from the memory using a switch or the like.

A conventional example of such a preset cheese is shown in FIG. In this figure, an RF (high frequency) received signal is supplied to a mixer 2 via an RF amplifier 1, mixed with a local oscillation output from a PLL oscillation circuit 3, and converted into an IF (intermediate frequency) signal.

A detection demodulator 5 is connected to the mixer 2 via an IF amplifier 4, and the output signal of the detection demodulator 5 is amplified by an amplifier 7°6 and supplied to a speaker 7.

The PLL oscillation circuit 3 includes a VCO (voltage controlled oscillator), a grease scaler, a variable frequency divider, a phase comparator, a reference signal generator, and an LPF (low pass filter), which are not shown.

A counter 8 is connected to the control end of the variable branching unit. The counter 8 is a preset counter, and its preset input terminal has a selection switch 94! The data memory 1o1 or 1-width storage output of the storage device IO is alternatively supplied.

On the other hand, the IF amplifier 4 is provided with a level determination circuit 11, which detects the electric field strength of the received signal from the IP signal.
When the detection level is above a predetermined level, the level determination circuit 11 generates a signal detection signal.

A controller 12 is connected to the output terminal of the level judgment circuit 11, and the controller 12 loads data of the counter 8 and performs up/down counting according to various command signals from the keypad 13 and signal detection signals from the level judgment circuit 11. , data memories 101 to 10 by selection switch 9
Controls the selection of rL, etc. Key? - The card 13 is provided with first to first channel selection switches (not shown) corresponding to the data memories 101 to 1%.

Note that the data memories 101 to 10. L can arbitrarily store tuning data such as the frequency of broadcast waves.

In the conventional preset cheese having such a configuration, when the first channel selection switch of the key date 13 is operated, a control signal representing the selection of the data memory 101 of the first channel is supplied to the selection switch 9 from the controller 12. The tuning data stored in the data memory 101 is supplied to the counter 8 by the selection switch 9 . The counter 8 loads tuning data in response to a load command supplied from the controller 12 and performs a PLL
Supplied to the oscillation circuit 3. P depending on tuning data
The oscillation frequency of the LL oscillation circuit 3, that is, the reception frequency is determined, and can be tuned to the frequency of broadcast radio waves.

Even if any one of the channel selection switches 1, 2 or 2 is operated, the same channel selection operation as described above is performed.

However, in such a conventional preset tuner, tuning data is already stored in the data memory 1o1 to 1orL, but in order to know whether or not the tuning data is already stored, the tuning switch must be operated, so the tuning data is not stored. It takes a lot of time to store new tuning data in empty data memory, so-called empty channels, or the necessary tuning data may be erased by accidentally storing it in data memory that already has other tuning data stored in it. There was the problem of being trapped.

SUMMARY OF THE INVENTION An object of the present invention is to provide a preset tuner that facilitates storage of new tuning data and prevents careless storage operations by making it possible to immediately identify empty channels.

The preset cheese of the present invention includes a determining means for detecting the output content of each data storage area of the storage means and determining whether the detected content is content other than tuning data, and a discriminating means that detects the output content of each data storage area of the storage means and determines whether or not the detected content is content other than tuning data. It is characterized by having a display means for displaying information corresponding to the storage area.

Example Hereinafter, embodiments of the present invention will be described with reference to FIG.

In FIG. 2, the same parts as in FIG.
In addition to the selection switch 9, a selection switch 14 is connected to each storage output terminal of 1 to 1orL.
4, the outputs of the data memories IJ 101 to 10rL are alternatively supplied to the register 15. register 15
A match detection circuit 16 is connected to the output terminal of the register 15, and the match detection circuit 16 generates a match detection signal when the output data value of the register 15 matches the reference value (for example, 00) output from the reference value generation circuit 17. do.

The detection output of the coincidence detection circuit 16 is selectively supplied to the latch circuits 191 to 19rL by the selection switch 18.

Each of the latch circuits 191 to 191 has a drive circuit 20. The light emitting diodes 211 to 2 are connected via 2 or L. The selection switches 14 and 18 are switched according to the content of the control signal supplied from the controller 12, and are interlocked with each other. keyboard 1
3 is provided with a memory display command switch (not shown) for commanding the display of the data memory which is an empty channel in the data memo January 01 to 1orLO. The rest of the structure of the preset cheese according to the present invention is the same as that shown in FIG. 1, so a description thereof will be omitted here.

In the preset tuner according to the present invention having such a configuration, when the memory display command switch of the key bead 13 is operated, a control signal is sent from the controller 12 to the selection switch 1.
Delivered on 4.18. This control signal is the selection switch 1
．． 4.1.8 is automatically switched at predetermined intervals. First, the selection switch 14 relays and supplies the output value of the first channel data memory to the register 15, and the selection switch 18 relays and supplies the output signal of the coincidence detection circuit 16 to the latch circuit 191. The output value of data memory 101 is held in register 15, and coincidence detection circuit 16 determines whether this held value matches the reference value output from reference value generation circuit 17. Since the reference value is a value that does not become the tuning data, if the held value is the tuning data value, there will be no match, so the output level of the match detection circuit 6 becomes a low level. On the other hand, if the held value is a value other than the tuning data value and matches the reference value, the output level of the match detection circuit 16 becomes a high level, and this high level is sent to the latch circuit 191 as a match detection signal.
supplied to When the latch circuit 191 does not hold the coincidence detection signal, the drive circuit 201 stops driving the light emitting diode 211, but the launch circuit 191
When holding the coincidence detection signal, the drive circuit 201 drives the light emitting diode 211 to turn on.

Next, the selection switch 14 relays and supplies the output value of the data memory 102 of the second channel to the register 15, and the selection switch 18 relays and supplies the output signal of the coincidence detection circuit 16 to the launch circuit 192. Similarly to the above, the match detection circuit 16 determines whether or not the held value held in the register 15 matches the reference value. If the held value matches the reference value, the drive circuit 202 causes the drive circuit 202 to emit light. Diode 212 lights up. In this way, the selection switch 14.
18 sequentially switches to n channel, repeats the same operation as above, and lights up the light emitting diodes 211 to 21rL.
is lit if it is an empty channel with no tuning data stored in the corresponding data memo January 01 to January 10n.

In the above-described embodiment of the present invention, the light emitting diodes 211 to 2'LrL are turned on if the channel is empty, but the light emitting diodes of only channels that are not empty may be turned on. Alternatively, empty channels may be distinguished by the color of light emitted from the light emitting diode.

Furthermore, it is clear that the display means is not limited to a light emitting diode, but may also be a light bulb, a liquid crystal display, or the like.

Further, in the embodiment of the present invention described above, the keyboard 1
Empty channels are displayed by operating the memory display command switch 3, but the display is not limited to this, but it is also possible to display an empty channel in response to turning on the power switch or operating the channel selection switch. It is okay to do so.

Effects As described above, according to the preset tuner of the present invention, the output contents of each data storage area of the storage means for storing tuning data are determined, and empty channels are displayed based on the determination result, so that new tuning data can be stored. You can see at a glance which channels are available, and you can save yourself the trouble of operating the channel selection switch for each channel and actually trying to receive it. Furthermore, it is possible to prevent necessary cheating data from being lost due to erroneously storing it in a data memory that already contains the cheating data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional example of a preset tuner, and FIG. 2 is a block diagram showing an embodiment of the present invention. Explanation of symbols of main parts 3...PLL oscillation circuit 8...Counter 9.1.4
．． 18...Selection switch 10...Storage device 16.
...Coincidence detection circuit 211 to 21TL...Light-emitting diode Applicant Pioneer Co., Ltd. Agent Patent attorney Motohiko Fujimura

Claims (1)

[Claims] A storage means having a plurality of data storage areas and capable of storing coaching data in each of the data storage areas, a selection means for outputting the content of any one of the plurality of data storage areas, and the selection means and a receiving section that obtains a reception same wave number according to the channeling data outputted from the channel, and detects the output content of each data storage area of the storage means, and the detected content is stored in the target area. 1. A preset tuner comprising: a discriminating means for discriminating whether or not the content is other than tuning data; and a display means for displaying the discriminating result of the discriminating means in correspondence with each of the data storage areas.