JPS61242106A - Electronic tuning type radio receiver - Google Patents

Abstract

PURPOSE:To attain a memory system with high efficiency by comparing the reception sensitivity level of the reception broadcast frequency with that of the broadcast frequency in a preset memory and changing the address of the frequency in the order of higher levels and at the same time switching the sensitivity level in response to the scanning result of each cycle of the reception band. CONSTITUTION:A control block 3 controls the reception mode and indicates the display of a display device 5. At the same time, the block 3 receives the wave detection output SD' from a wave detecting circuit 15 to decide the reception density level of a broadcast wave in a signal automatic memory mode and controls an RF amplifying circuit 11 to switch the reception sensitivity between Lo and DX. The scanning action is started to search a boardcast station. Then the scanning action is discontinued if the output SD' is higher than a prescribed level and the reception broadcast frequency and the sensitivity level are written to a preset memory after giving the A/D conversion to the output. Then the research action is started again. Here the sensitivity level is compared with that already written and the stored information on the broadcast frequencies are rearranged in the order of levels. Thus a highly efficient memory system is obtained.

Description

[Detailed description of the invention]

8. Field of Industrial Application The present invention relates to electronically tuned radio receivers equipped with digital synthesizer tuners, and in particular to improvements in the signal automemo (SAM) system. B Summary of the Invention 1eBam Ski Y7 has a signal auto memory (ShM)+ii function that sequentially stores broadcast frequency information received during tuning into a preset memory, detects the sensitivity level of the received broadcast frequency, and performs tuning. IJ-Put sa r surrounding a
I am using an electronically tuned radio that allows you to rearrange the broadcast stations in the preset memory in order of level. C. Prior art A conventional digital tuning radio receiver has a key matrix consisting of various push-button switches for operations such as band selection, etc., and a key matrix that controls each circuit of the receiver in response to human power from the key matrix. It is equipped with a microcomputer that can be used to troll. The cono microcomputer usually has a preset spring memory (RAM) that stores the broadcast lIJ wave numbers of i-stations, and the frequencies in this memory can be called up by using the key switches in the key matrix, and new or new frequencies can be called up by using the key switches in the key matrix. It is designed to store the desired frequency of 9R. The signal auto-memory method means to sequentially record information on each frequency that was damaged during broadcast frequency scanning. It is something that clumps together. D. Problems to be Solved by the Invention In the conventional T/C system, it was not possible to select which memory address to write data into among the memory addresses for these several stations. In addition, the reception sensitivity when searching for each broadcast wave remains constant, and damage can be efficiently received.'rSJ:
! There were 4 non-J machines for which it was not possible to input the tJ revision information to the IJK memo. The object of the present invention is to provide an electronic leg-type intrusion receiver iIc with a convenient signal automatic memory system that improves the structure of the prior art. In order to continuously acquire the signal, we will send an electronic signal with automatic memory @ function to Geo-receiver Iso.

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The reception sensitivity level t45 of reception number 8 broadcast frequency M is output, and the middle stage compares that level with the reception sensitivity level of broadcast #d revised number in the preset memory, and the reception sensitivity level is adjusted according to the comparison result. In addition, we have provided a means to read the address of the broadcast station [fi] in the preset memory, and a middle stage and t that can adjust the reception sensitivity tv'J according to the scanning result for each round of the reception band! Features. F Function P-8CAN/S AM key! If you press it for more than 2 seconds, the signal auto memory function will be executed, and the preset broadcasting station technique number information will be changed in descending order of injury sensitivity level and according to the results of scanning each round of the reception band. The reception sensitivity can be switched from Lo to DXK. The present invention will be described with reference to the embodiments shown in the drawings below.
Figure %1 shows Ki-ni 8 on the Daijimel tuning radio receiver.
A one-fold arrangement using A'ft is shown. In the same device, l is the FM front end block, 2 is the AM tuner block, 3 is the control block, 4 is the key matrix, 5 is the display, 6 and 7 & PLL for FM and AM.
It is a circuit. The FM end block l consists of a 46 frequency amplifier circuit 11, a mixer circuit, an intermediate station number amplifier circuit 13, a local oscillator 14, etc., and the output of the intermediate 8 temporary amplifier circuit 13 is given to the FM detection circuit 15, Constant output is via MPX circuit 16”l [Left and right channel output L ch Out and Rch
It becomes out. The 1M tuner block 2 consists of a 411-frequency amplifier circuit, a mixer circuit ρ, a local oscillation, intermediate frequency amplifier circuit, and an AM detection circuit 6. The FM PLL circuit 6 is a programmable divider 61
, i Phase comparison I consists of a low-pass filter 63, and the AM PLL [i; circuit 7 also has a programmable divider 71, phase comparison! 72, a low-pass filter 74, and the reference frequency output f0 from the reference frequency excavator 8 or the output from each phase comparator 72 is applied to one of the inputs, and the output of each PLL circuit is )? t'J section oscillation port 14. It is given as the control voltage Vt of B. Control block 3 consists of a microcomputer, read-only memory (ROM), random access memory (RAM), and ALU
, human power and output latch circuit 31°! , instruction decoder ah, driver times w634, these/? !
Consists of 35% pass lines connecting r circuits. Key matrix 4 is a plurality of practice switches arranged in a matrix, the target is morph/tally switch 4]
, a diode switch string for initial setting, a transistor switch string, etc., and the key power generated by making these switches is given by a 30-man Carracci circuit 31K. Momentary switch 4] is the manual tuning switch MAN@UP, MAN/DN. Precut memory call key M1 to M6
, fillll monaural stereo cut-off key 5TER
E0ON/OF, display switching key RECALL
, auto tuning key 5EEK UP, 5EE
KDN. Consists of 5 CAN UP. Initial setting diode
The switch 42 is used to shorten or open the diode at the intersection point t on the matrix for initial setting, and is also used for information selection mode and clock mode CLOCK. Consists of a diode switch to select and set the radio frequency display and display selector. The Transistor Switch Company broadcasts correspondence information using a transistor-based switch that can be turned off at any time.
15'1: switch SK that turns on when receiving a broadcast, switch SD that detects whether or not a broadcast station has been received during auto search, switch ST that indicates that a stereo broadcast is being received, tape mode or radio It consists of a switch T/R for detecting the mode, and a tape running detection switch (K). The control block 3 responds to key manual input by operating the switch on either side of the switch to input the FM PLL program or the AM PLL program.
L[[21*7 programmable divider 71 to control the reception mode, display Y? of display gj5? Executes actions such as giving the 11th command. Also, the detection circuit 1
5, the receiving sensitivity level of the broadcast wave is determined in the signal auto-memory mode described later. Further, in the above mode, as described later (in order to change the reception sensitivity tL0tD It is also input as a clock signal to the programmable divider 61,
The other inputs of 71 are respectively given the starting outputs from the local generators 14. Now, the read-only memory ROM of the control block 3 is pre-loaded with 10 grams for executing the signal auto memory (SAM) function and programs for executing other functions. Figure 2 shows a flowchart of one operation for carrying out the signal auto-memory function described above. As is clear from the figure, when calling the preset,
When calling and listening to the preset station at the third address in the preset memory (RAM), the P-8CAN/S
If you press the AM key for more than 2 seconds, a search for a broadcast station will start at L0 sensitivity, and when a station with that sensitivity is found, the received broadcast station 1 at the time of 7 will be stored in the fourth address of the preset memory.
71tffY4f included, '9! , start the search. If this happens, search t1 within the pad/do of the same channel.
[Also, if you cannot find a broadcasting station with a sensitivity of 7,
The first same ¥ A lap tr that started the signal auto memory
Skip the jL number and search for DX sensitivity from the next channel. In order to find the next broadcasting station from K, the current received broadcasting frequency number is written in the fifth address of the preset memory, and then the search is started again. This operation continues until the number of received broadcast frequencies has been loaded into the 6th address. When the loading is completed, the last discovered broadcasting station is received and the above-mentioned sequence is continued. The signal automemory operation is completed. Furthermore, by AD converting the constant output SD (signal meter output) in the control block 3, it is possible to convolute each received broadcasting frequency t into its reception sensitivity level JIliK preset memory, and its 'a !
If! The operation sequence 'Yjii43 of t is shown in the flowchart of FIG. As is clear from the figure, when the supplementary key t is pressed for more than 2 seconds, scanning starts and the broadcasting station t is searched. However, if the correction force SD exceeds a predetermined value, scanning is stopped and the corresponding output '! kADf and then receive broadcasting station i
Load the number and its sensitivity level into the preset memory and search again. Similarly, the detection output S D'
When the value exceeds a predetermined value, it is stored in the level and 8ahv preset memory, but in this case, it has already reached -11.
The information on the number of broadcasting stations #L is rearranged in the memory in order of magnitude by comparison with the recorded level. This operation is repeated, and after completing one search within the color channel band, these slow operations are completed and the original broadcast is received. However, in the above operation, the memory of preset memory
Space is limited, for example, if there is memory space for 6 stations, even if the detection output SD of 7 or more stations exceeds a predetermined value, the received broadcast frequency with a lower level will be discarded and the received broadcast frequency with a higher level will be discarded. Rf is used to load only the number of the top 6 receiving broadcast stations into the preset memory KIF.
I am a connoisseur. As is clear from the detailed explanation of the H invention, according to KufueA, it is possible to selectively store the reception broadcast frequency t, warp sensitivity and bell face in the preset memory, and the search sensitivity can also be set from Lo. Switching to DX is possible h'b and efficient memory is performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are flowcharts for explaining its operation. l...FM float/end block, 2...AM tuner float/, 3-φ control block, 4...
...Key matrix, 5...Display device, 6.7...
FLY for FM, AM, circuit, ROM...Read-only memory, RAM...7 types of memory. The movement of the heather is amazing! 6th 70-Tayat related to L shape Figure 3

Claims (1)

[Claims] Receiving the frequency information in a receiver that has a signal auto memory function that sequentially writes broadcast frequency information received during frequency scanning into a preset memory, and is equipped with a switch for starting the function and a microcomputer for mode control. means for detecting a sensitivity level and comparing the detected level with a reception sensitivity level of frequency information in the preset memory; and according to the comparison result, addresses of broadcast frequency information in the preset memory are assigned in descending order of reception sensitivity level; Means to change and reception band 1
1. An electronically tuned radio receiver comprising: means for switching reception sensitivity according to the result of scanning for each round.