JPH0611650Y2 - Preset receiver - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a preset receiver for selecting a broadcasting station by a preset switch.

(B) Conventional technology In recent years, in car radios and the like, many functions have been incorporated by enhancing the development of software programs for microcomputers, and the number of operating switches tends to increase. For this reason, the function is sacrificed or the size of the operation switch is reduced in a car radio etc. where the operation panel space is limited, but this causes a problem that the function is not utilized and the operability is poor. .

Therefore, a combination of an existing switch and a soft program having a third function is disclosed in, for example, Japanese Patent Laid-Open No. 61-203714.

However, this combination with the existing switch is difficult to remember unless it is related to the third function, and especially when the driver operates like a car radio, many operations are performed. It is not safe to do so.

(C) Problems to be Solved by the Invention The present invention is intended to provide a preset receiver having good operability without increasing the number of operation switches.

(D) Means for solving the problems The present invention determines whether or not the preset switch is operated within the first set time and the second set time of the timer means which is operated when the preset switch is operated. The determination means is provided in the control means having the sweep means.

(E) Operation According to the preset receiver of the present invention, the reception frequency information stored in the preset memory is read, the reception frequency information is written to the preset memory, and the sweeping means is operated according to the operation time of the preset switch. The automatic writing of the reception frequency information of the broadcasting station based on the operation into the preset memory is controlled. Further, by assigning the functions in the above order, it is possible to prevent unintended frequency information from being rewritten due to an erroneous operation.

(F) Embodiment FIG. 1 is a circuit block diagram of a preset receiver according to an embodiment of the present invention. (1) is an antenna, (2) is a high frequency amplifier circuit for amplifying the output of the antenna, and (3) is A mixing circuit that mixes the output of the high-frequency amplifier circuit and the output of a local oscillator circuit (5) described below to obtain an intermediate-frequency signal, (4) is an intermediate-frequency amplifier circuit that amplifies the output of the mixing circuit, and (5) is A local oscillator circuit composed of a well-known PLL circuit, and (6) is a programmable frequency divider composing the PLL circuit. (7) is a control means composed of a micro computer equipped with a sweep means for changing the frequency division ratio of the programmable frequency divider to perform tuning, and the preset switch (P ₁ ) (P ₂ ) (P ₃ ) (P ₄ )
(8) is a preset memory for storing the reception frequency information of the broadcasting station, which is generally composed of a RAM (random access memory) and corresponds to the preset switches (P ₁ ) to (P ₄ ), respectively. It has a memory unit consisting of address D.

The signal (S ₀ ) from the intermediate frequency amplifier circuit (4) is a sweep stop signal during automatic sweep.

FIG. 2 is a flowchart showing the operation procedure of the control means (7) in FIG. 1, and the operation will be described based on this. First, it is checked whether any one of the preset switches (P ₁ ) to (P ₄ ) has been operated (step S-
1) If there is no switch input, continue checking the states of the preset switches (P ₁ ) to (P ₄ ). If there is a switch input, it is checked whether or not the operation of the preset switch is released (step S-2). When the operation of the preset switch is released, the time required to release the operation of the switch is less than 2 seconds (first set time), 2 seconds or more and less than 4 seconds (second set time), or It is determined whether the time is 4 seconds or longer (step S-3, 4).
If it is less than 2 seconds, the reception frequency information is read from the preset memory (8) memory unit corresponding to the operated preset switch (step S-5). For example, when the preset switch (P ₂ ) is operated, the preset memory (8) is read so that the contents of the memory unit at address B can be read.
Is accessed. If it is more than 2 seconds and less than 4 seconds, the preset memory corresponding to the operated preset switch
Reception frequency information of the broadcasting station is stored in the memory unit (8) (step S-6). If it is 4 seconds or more, the sweeping means is activated to automatically receive the broadcasting station, and the sweeping stop signal (S ₀ ) is input to temporarily stop the sweeping means. And
Automatic preset memory for receiving frequency information of broadcasting station
It is stored in the memory unit at address A in (8). Thereafter, the above operation is repeated for the memory units B to D of the preset memory (8) (step S-7).

In step S-7, the start frequency of the automatic sweep is set to the reception frequency of the broadcasting station stored in the memory unit of the preset memory (8) corresponding to the operated preset switch, and its memory is set. If you store the data sequentially from the unit, it will be automatically stored in the memory unit from the broadcasting station of the next inter-station step, so in the end,
The preset switches (P ₁ ) to (P ₄ ) as a whole are sequentially shifted and stored by one station, and by repeatedly operating the same preset switch, the frequency information of the broadcasting station that can be received can be operated. You can store one station at a time.

By assigning the function of writing the received frequency information after the function of reading the received frequency information, the memory unit corresponding to the pressed preset switch is prevented from being rewritten by mistake. Further, by allocating the automatic storage after the function of writing the reception frequency information, it is possible to prevent the memory unit corresponding to the preset switch that is not pressed from being rewritten by mistake.

FIG. 3 is a flow chart showing another operation procedure of the control means (7). In the above embodiment, at the time of automatic storage, it is automatically performed from the corresponding memory unit (address A) of the preset switch (P ₁ ). Since the reception frequency information of the broadcasting station is stored, there is a drawback that the reception frequency information of the broadcasting station that you want to fix is erased.To solve this, a memory unit that is not automatically stored in the preset memory (8). (Address A, Address B) are provided. According to this, only when the preset switch (P ₃ ) and (P ₄ ) are operated for 4 seconds or more,
Memory unit for memory (8) for preset and memory unit D
Only the memory unit of the address will store the reception frequency information of the broadcasting station that has been automatically received, and the memory unit of the preset memory (8) corresponding to the preset switch (P ₁ ) (P ₂ ) (address A, The contents of address B) will not be changed even if the automatic storage operation is executed.

FIG. 4 is a circuit block diagram of another embodiment, and FIG. 5 is a flow chart showing the operating procedure of the control means (7) of FIG. 4, which is the same as the operation shown in FIG. LED (L ₁ ), (L ₂ ), (L ₃ ) in sequence according to the operation time of
Is added to the operation for controlling. More specifically,
If there is a switch input, only LED (L ₁ ) is turned on (step S-2), and if the switch operation time is 2 seconds thereafter, only LED (L ₂ ) is turned on and further 4 seconds. , L
Only ED (L ₃ ) is turned on, and when the operation of the switch is released, all LEDs (L ₁ ), (L ₂ ) and (L ₃ ) are turned off (steps S-3 to 8). With this, the user can know the operation time of the preset switch, and when the operation is released, any one of the steps S-11 to S13 is controlled.
You can know what (7) will handle.

FIG. 6 is a flow chart showing another operation procedure of the control means shown in FIG. 4, in which LEDs (L ₁ ) and (L ₁ ) are sequentially added to the operation shown in FIG. 3 corresponding to the operation time of the preset switch.
₂ ) and (L ₃ ) control operation is added.

In the present invention, the first set time is set to 2 seconds and the second set time is set to 4 seconds, but the present invention is not limited to this as long as the inequality of first set time <second set time is satisfied. .
Although the operation time of the preset switch is notified by the LED, the buzzer is driven in such a manner that the difference becomes clear when the first set time and the second set time elapse (for example, (“Boo” within the first set time, “Boo Boo” within the second set time, “Boo Boo” within the second set time).

(G) Effect of the invention As described above, according to the preset receiver of the present invention, the preset memory can be read and written and the automatic sweep can be started and automatically stored according to the operation time of the preset switch. It is especially effective for devices with limited operation panel, and is very excellent in operability and safety.

Function to read frequency information to one preset switch. Function to write frequency information currently being received. The functions to automatically write multiple frequencies are assigned in this order. Is being rewritten.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a preset receiver according to an embodiment of the present invention, FIG. 2 is a flow chart showing an operation procedure of main parts of the preset receiver of FIG. 1, and FIG. 4 is a flow chart showing another embodiment of the main part of the preset receiver, FIG. 4 is a circuit block diagram of the preset receiver of another embodiment, and FIG. 5 is the main part of the preset receiver of FIG. Flow chart showing operation procedure, FIG. 6
(a), (b) is a flow chart showing another embodiment of the main part of the preset receiver of FIG. (5) …… Local oscillator circuit, (6) …… Programmable frequency divider,
(7) …… Control means, (8) …… Preset memory, (P ₁ ) ~
(P ₄ ) …… Preset switch.

Claims (2)

[Scope of utility model registration request] 1. A local oscillator circuit comprising a PLL circuit,
Control means having sweep means for changing the frequency division ratio of a programmable frequency divider constituting the PLL circuit to perform tuning, a plurality of preset switches, and reception frequency information of a broadcasting station by the preset switches. In a preset receiver having a preset memory that stores and reads a plurality of memory units, the control means includes a timer means that is activated when the preset switch is operated, and a timer means of the timer means. A determining means for determining whether or not the preset switch is operated within the first set time and the second set time, and the operation of the preset switch determines that the preset switch is within the first set time. Then, the reception frequency stored from the memory unit of the preset memory corresponding to the operated preset switch. Reads the broadcast, if it is judged to be within and at a first set time or more second set time, stores the received frequency information in Memoriyunitsuto the Purisetsuto memory corresponding to the operated pre excisional Sui Tutsi,
Further, when it is judged that it is the second set time or more, the preset receiver is configured to operate the sweep means to automatically store the reception frequency information of the broadcasting station in the preset memory. 2. The first means of the timer means for the control means.
7. The preset receiver according to claim 1, further comprising an informing means for informing the progress of the set time and the second set time.