JPS61203714A - Automatic storage device for electronic channel selection - Google Patents

Abstract

PURPOSE:To attain automatic storage without increasing number of operation switches by using a memory write switch and an automatic channel selection switch so as to activate an automatic storage function. CONSTITUTION:When a control circuit 4 starts its operation, it checks for the state of an operation switch 5. When the operated switch is the memory write switch in this case, a memory write enable state is continued for a prescribed time. When the switch operated during the time is the automatic channel selection switch, automatic storage operation is executed. Frequency sweep is executed automatically in the automatic storage operation and a frequency with a station detection signal input 7 is written in a RAM 6. That is, when the memory write switch is depressed and the automatic channel selection switch is depressed during the write enable state, the automatic storage is applied. Thus, the automatic storage operation is attained without increasing the number of operation switches.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic electronic channel selection storage device, and more particularly to an automatic storage device that automatically stores selected frequencies in a preset memory.

[Conventional technology]

The automatic storage function is a function that automatically writes frequencies at which broadcasting stations exist, that is, frequencies at which broadcasting can be received, into these preset memories. Conventionally, dedicated switches have been used to activate these functions. Therefore, in order to realize this automatic memory function in a device with a small front operation panel, such as an in-vehicle radio/stereo device, there is a problem in that the space is small. Other operating switches are removed, that is, other functions are sacrificed, or an automatic memory switch is forcibly installed, resulting in a smaller operating switch and poor operability.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic electronic channel selection storage device that overcomes all of the above-mentioned drawbacks and can be easily handled without increasing the number of operation switches.

[Problem t-Means for solving]

The electronic channel selection automatic storage device of the present invention has a configuration including an l-LAM for storing frequency data tl, a control circuit capable of automatically sweeping the frequency and having a biased station detection signal input for automatic stop, and this control circuit. An operation switch to be operated and the RAM
The present invention is characterized in that it includes a memory write switch that enables writing of the frequency data, and an automatic channel selection switch that starts the automatic frequency sweep.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows an electronic channel selection automatic storage device according to an embodiment of the present invention. FIG. In the figure, a PLL section 1 is a phased lock loop for controlling a local oscillation section of a radio or the like.
p) t-configure and fully control the receiving frequency. A control circuit 4 composed of a microprocessor or the like controls the PLL section 1t according to a switch operated by an operation switch 5, and controls the reception frequency.

Further, the display circuit 3 drives the display 2 to display the current state and reception frequency. The control circuit 4 includes a RAM
(Random Access Memory) 6
is connected, and the contents of the preset memory, that is, the received frequency data are stored. The 1-station detection signal cuff is a signal input for stopping the sweep during automatic channel selection.

FIG. 2 is a flowchart showing the operation procedure of the control circuit 4 shown in FIG. In the figure, when the control circuit 4 starts operating, it first checks the state of the operation switch 5. If there is no switch input, the state of the operation switch 5 is continued to be checked. If there is a switch input, it is checked whether this switch is a memory write switch or not, and if not, the process corresponding to the operated switch is performed. This state for memory write switch (memory writable state)
Continue for 5 seconds. In this example, it is 5 seconds, but this time can be set arbitrarily. If no operation switch 5 is operated during these 5 seconds, the original process (main routine) returns to K, and if any of the operation switches 5 is operated,
It is checked whether the switch is an automatic tuning switch or not. If not, a process corresponding to the operated switch is performed, and if it is an automatic tuning switch, an automatic storage operation is performed. In the automatic storage operation, the frequency is automatically swept, and the frequency where the station detection signal is located is written in the iRAM 6.

To write into the preset memory in this embodiment, first select the frequency you want to memorize by manual tuning or automatic tuning, and then press the write switch.

Then, it is in a writable state υ, and if you press the preset memory switch you want to store at this time, the frequency currently being received is stored in the preset memory corresponding to that switch. This write enabled state lasts for several seconds after the write switch is pressed or released.

In addition, the automatic tuning function is a function that automatically searches for a frequency that is being broadcast when you press the automatic tuning switch. 8CAN starts looking for another broadcast
It has a function.

The present invention uses these memory write switches and automatic channel selection switches to realize an automatic storage function.

The feature is that the automatic memory function is activated when the memory write switch is pressed and the automatic channel selection switch is pressed while in the writable state.

〔Effect of the invention〕

As explained above, according to the present invention, automatic memory operation can be performed without increasing the number of operation switches, and is therefore particularly effective in devices with limited operation panels such as car radios. A microprocessor is generally used for control, but it has the advantage that an automatic memory function can be easily realized without increasing costs.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an electronic channel selection automatic storage device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operating procedure of the main parts of the device shown in FIG. l...PLL section, 2...Display unit, 3...
...Display circuit, 4...Control circuit, 5...
...Operation switch, 6...RAM, 7...
...Station detection signal input. Agent: Susumu Uchihara, patent attorney,・′-・t・・ゝ・,. Kaya /I! f Second Prefecture

Claims (1)

[Claims] A RAM for storing frequency data, a control circuit capable of automatic frequency sweeping and equipped with a station detection signal input for automatic stop, an operation switch for operating this control circuit, and the R
An electronic channel selection automatic storage device comprising: a memory write switch that enables AM to write the frequency data; and an automatic channel selection switch that starts the automatic frequency sweep.