JPS6316046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a receiver having a memory device.

[Conventional technology]

Traditionally, car radios have been a typical example of this type of receiver, but recently, even receivers equipped with electronically controlled tuners are increasingly equipped with memory devices to make tuning operations easier. In addition, such electronically controlled receivers automatically scan the receiving band,
Many devices also have an automatic tuning function that stops this scanning in response to a reception status signal generated when tuned to a broadcasting station with an appropriate reception level. but,
When storing the tuning data of this broadcasting station in the memory device, it was done manually and at the discretion of the listener. By the way, since car radios are mobile, this memory is often rewritten to the local station when traveling, for example, and in this case, the memory operation is performed after automatic tuning as described above. It was a hassle to have to repeat the steps several times.

In order to eliminate this inconvenience, for example,
An automatic sweep preset type receiver as shown in Japanese Patent No. 56-147514 has been proposed.

[Problem that the invention seeks to solve]

However, this automatic preset type receiver
At the time of automatic presetting, simply store stations higher than the preset reception level in the memory device in sequence.
During the channel selection operation, each time the channel selection button is operated, the receiving stations are switched in order of frequency. Therefore, when trying to select the station with the highest reception level, the best station cannot be determined until all memory stations have been received, which is inconvenient. In this case, it would be convenient to be able to select stations in the order of the reception level.

The present invention eliminates such trouble and can automatically store tuning data of broadcast stations with appropriate reception levels in a memory device while scanning the band with a single operation. The reception levels of these memorized stations are sequentially compared to determine the reception status of the station with the best reception level.Furthermore, when recalling the memory and selecting stations, the stations are similarly recalled in order of relative reception level. The purpose is to obtain a receiver capable of

[Means for solving problems]

The receiver according to the present invention includes a control unit that receives the station with the highest reception level after the automatic preset operation is completed, and performs a tuning operation in which the reception stations are switched in descending order of reception level by a tuning operation. It is characterized by the following points.

[Effect]

After the automatic preset operation is completed, the control section selects the receiving station so as to receive the station with the highest reception level, and switches the receiving stations in descending order of reception level each time the selection button is operated.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, an antenna 1 is connected to a tuner 2, and a signal is supplied to the tuner 2. A part of the output of the tuner 2 is guided to a reception level determination circuit 3. For example, the reception level determination circuit 3 determines the reception level step by step, and supplies an output according to the reception level to the control unit 4 in the form of a digital code. The control unit 4 includes a memory address counter MA, a reference level RFLV, and an address memory MLA. The tuner 2 is tuned by the output of a tuning voltage generating circuit 8, and the output of the tuner 2 is guided to a speaker 10 via a low frequency amplifier 9. The tuning voltage generation circuit 8 is connected to the receiving station data area 71 of the receiving memory section 7.
Its output is fixed using tuning data (LVB = reception level buffer, RCVD; reception frequency data). This consists of, for example, a PLL synthesizer. The memory device 6 is divided into memory areas 100 and 200 corresponding to the memory selection buttons 51 and 52 of the channel selection device 5, and the memory areas 100 and 200 include a data area 10.
1 to 109, and 201 to 209. In this example, two memory areas can be selected, each memory area (LB; level buffer area, FDB;
Nine pieces of tuning data can be stored in the frequency data area (frequency data area).

The channel selection device 5 has a memory enable button 53, and this button is used when changing the memory. For example, after pressing the memory enable button 53, press either the memory selection button 51 or 52 within 5 seconds. It works when pressed. The purpose of performing such a timed operation is to prevent erroneous operations.

Next, the automatic preset operation will be explained with reference to the flowchart shown in FIG.

For example, when the memory selection button 51 is pressed after the memory enable button 53, the channel selection device 5 sends this command to the control unit 4. Control section 4
First, in st1, each data area 101 to 109 of the memory area 100 corresponding to the memory selection button 51 of the memory device 6 is erased. Next, tuning data corresponding to the lower limit frequency of the band is set in the receiving station data area 71 of the receiving memory section 7.
st2. In other words, st3 is the reception state of the lower limit frequency of the band. In this state, the output of the reception level judgment circuit 3 is taken into the control section 4, and in step 4, if the reception level does not reach the appropriate level, in step 5, the tuning data in the reception station data area 71 is transmitted, for example, by the frequency corresponding to the minimum inter-station space. increasing st
7. Similarly, st4 writes the output of the reception level determination circuit 3 to the control unit 4. This operation is repeated, and when a station with a suitable reception level is reached, the ST
5. The control unit 4 transfers the tuning data in the receiving station data area 71 at this time to the data area 10 in the memory area 100 of the memory device 6.
st8 to transfer to 1. After this, the tuning data in the receiving station data area 71 is increased again by the frequency corresponding to the space between the lowest stations, st7, the output of the receiving level judgment circuit 3 is taken into the control section 4, and operation st5 is repeated, and an appropriate receiving level is set. st8, which transfers the contents of the receiving station data area 71 to the memory area 100 in the memory device 6 each time the station reaches the station. Therefore, in the data areas 101 to 109 in the memory area 100,
Tuning data of stations received in sequence at appropriate reception levels are written. This scan is
When the upper limit of the band is reached or the memory of 9 stations is completed, it stops and the automatic preset operation ends.

Next, the reception operation for selecting the best station after the preset operation is completed will be explained with reference to the flowchart of FIG.

When the preset operation is completed as described above, the tuning data in the data area 101 is stored in the receiving station data area 71 of the receiving memory section 7.
12, the tuning data in the data area 102 is transferred to the standby station data area 72 and st1
5. A reception state is entered according to the data in the reception station data area 71, step ST16, and the output of the reception level determination circuit 3 is taken into the control unit 4 ST17, which is temporarily stored. After this, the contents LVB and RCVD of the receiving station data area 71 and the contents of the standby station data 72 (LCB: check level buffer, CMCD: standby station data) are exchanged, st18, and therefore the receiving state is based on the data of the data area 102. st1
9. st20 which takes in the output of the reception level determination circuit 3 at this time. This reception level and the reception level in the previous data area 101 are compared in the control unit 4, st21, and the one with the higher reception level is left in the receiving station data area 71, st22. Next, the tuning data in the data area 103 is transferred to the standby station data area 72, and the reception levels are compared in exactly the same way. In this way, memory area 1
In st23, when all the stations stored in 00 are compared, the station remaining in the receiving station data area 71 is received first as the best station.

By the way, when the memory selection button 51 is pressed in a state where the memory is not enabled, the tuning data in the data areas 101 to 109 of the memory area 100 is stored in the receiving station data area 71.
Each time this button is pressed, the signals are sent one after another, and at this time, the reception levels are not compared, and the desired station can be selected and fixed.

Now, with these operations, if muting is applied during scanning or when comparing station levels, noise will not occur. Further, during the operation, when the first station to be received does not necessarily have to be the best station, it is not necessary to provide the standby station data area 72.

Next, if you want to display stations with good reception levels one after another each time the memory selection button is pressed, each station except the data area of the station that remains in the receiving station data area 71 as much as possible This is possible if the above operation is performed at a station in the data area. A flowchart of this channel selection operation is shown in FIG. This channel selection operation is performed by lowering the comparison level RFLV of the control unit 4 one step at a time from the maximum level, and
According to step 11, the tuning data in the data area is read out and received, the received levels are compared, and stations with higher received levels are sorted in the order of data areas 101 to 109. After the operation of the flowchart shown in FIG. 4 is completed, the control unit performs an operation of reading out and receiving tuning data in the order of arrangement each time a calling operation is performed.

〔Effect of the invention〕

As described above, according to the present invention, with a single operation, stations in the region can be memorized and the best station can be received, which is very convenient.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart of the automatic preset operation, FIG. 3 is a flowchart of the best channel selection operation after the automatic preset operation is completed, and FIG. 4 is a flowchart of the automatic preset operation. , is a flowchart of a channel selection operation in which stations with good reception levels are received one after another every time the channel selection operation is performed. DESCRIPTION OF SYMBOLS 1...Antenna, 2...Tuner, 3...Reception level determination circuit, 4...Control unit, 5...
Tuning device, 6... Memory device, 7... Receiving memory section, 8... Tuning voltage generation circuit, 9...
...Low frequency amplifier, 10...Speaker.

Claims (1)

[Claims] 1 a tuner, a tuning voltage generation circuit that supplies a tuning voltage to this tuner to tune it to a predetermined frequency, a reception level determination circuit that determines the level of the reception signal received by the tuner, and a reception level determination circuit that determines the level of the reception signal received by the tuner; storage means for storing tuning data of a receiving station whose reception level is at a predetermined level; tuning data of a station to be received is set from among the tuning data of the receiving stations stored in the storage means; a receiving station setting section, a tuning means for instructing the receiving station setting section to select tuning data of a station to be set from among the receiving station tuning data stored in the storage means, and the receiving station setting section. By sequentially replacing the tuning data of the receiving station set to , a predetermined band is scanned, and the tuning data of the receiving station of the received signal of the predetermined level is stored in the storage means, and the reception at the highest level is performed. The tuning data of the receiving station is controlled to be set in the receiving station setting section, and the tuning data of the receiving station stored in the storage means is controlled to be set in the receiving station setting section, and the tuning data of the receiving station stored in the storage means is set in the receiving station setting section. A receiver equipped with a control section that replaces the station setting section.