JPS6031311Y2 - Multi-band preset receiver - Google Patents

Description

[Detailed description of the invention] The present invention is equipped with a storage device and has a preset function that electronically stores a plurality of receiving stations, and stores the receiving station data that was being received at the time of band switching, and stores the receiving station data that was received at the time of band switching. The last received station memory function allows you to receive the station that was previously received, and the preset sequential forwarding function allows you to sequentially recall data stored in the storage device by operating a preset key instead of using a preset key, by operating a single operation key. The present invention relates to a band preset receiver equipped with a band preset receiver, and is characterized in that it is configured to call up the last receiving station stored at the time of band switching by operating a preset forward key, and in effect calls up one station more than the number of preset keys. This invention relates to a multi-band preset receiver.

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

FIG. 1 shows a receiver in which a local oscillation circuit 1 is composed of a PLL synthesizer 2. By changing the division ratio N of a programmable frequency divider 3 constituting the PLL 2, AM,
Necessary local oscillation frequencies fo and fo' are appropriately generated from the FM voltage control oscillator 45 and applied to the mixing circuits 6 and 7 for channel selection.

Reference numeral 8 denotes a frequency division ratio setting means connected in parallel to the programmable frequency divider 3, which changes the frequency division ratio of the programmable frequency divider 3 by counting the sweep pulses from the sweep pulse generator 9; It is configured.

10 is generally a RAM for storing the value of the frequency division ratio setting means 8.
(Random access memory), as shown in Figure 2, there is an address A for storing previously received AMM transmission data, an address F for storing 1M broadcast data, and 1M preset data. It is composed of addresses B to E for storing AM preset data, and addresses G to J to store AM preset data.

Reference numeral 11 denotes a control circuit that receives signals from the 1M band key 12, AM band key 13, preset keys P□ to P1, preset forward key PA, and memory key M, and controls the frequency division ratio setting means 8 and RAMIQ. RAM1 Q
The signal of the 1M band key 12 is applied to the write signal terminal W□ of the AM address A of The signal of the key 13 and the output signal of the AND gate A1, which will be described later, are added, and the RAM
It is configured to control writing and reading to and from 10.

Further, the signal of the AM band key 13 is applied to the FM address write signal terminal W6 of the RAM i Q, and the signal of the AM band key 13 and the delay circuit 15 are applied to the address signal terminal AD6 via the OR gate OR2. A signal from the FM band key 12 and an output signal from an AND gate A2, which will be described later, are added.

The preset addresses B-E and G-J have write signal terminals W2 to W5. A signal from the memory key M is applied to W7 to W1o, a signal from the FM band key 12 is applied to one input of the address signal terminals AD2 to AD5, and an address signal S1 to S4, which will be described later, is applied to the other input. AND gates A3 to A6 are connected thereto.

Further, the address signal terminals AD7 to AD1° are connected to an AND gate A7 to which the signal of the AM band key 13 is applied to one input, and the address signal S□ to S is applied to the other input.
~AIO is connected.

16 is an up counter that counts the pulses generated from the one-shot multivibrator 17 every time the preset forward key PA is operated, and the count output is sent to the decoder 18, and is an address signal S for selecting the address of RAMI Q.

-84, and the address signal S.

has AM and FM band keys 13.1 to one input respectively.
2 signals are applied to the ΔAND gate A1. The remaining address signals S1 to S, which are applied to the other input of A2, are applied to AND gates A3 to A6 and A7 to A10, respectively, and the counting output is increased by 1 by operating the preset forward key PA. The signal is S.

, S□, . . .

Also, this up counter 16 preset input J□~J
, are connected to preset keys P0 to P through a decoder 19, and the selected preset key signal is converted into a corresponding numerical value by the decoder 19 and inputted to the counter 16, so that the decoder 18 outputs a corresponding value. The preset keys P1 to P are common, and in combination with the FM and AM band keys 12 and 13, the preset addresses of the RAMIQ are selected. .

For example, when the third preset key P3 is operated, the decoder 19 presets the numerical value "3" to the counter 16, and the decoder 18 generates the address signal S3. At this time, the FM band key 12 is operated. Then, AND gate A5 is opened and the preset address is selected.

It should be noted that when the preset forward key PA was operated, the address signal S0 was generated and AM and FM addresses A and F could be called up, but when the preset keys P1 to P4 were operated, the address signal S was generated.

is not generated, so AM and FM addresses A and F, where the previously received broadcast data is stored, are not called.

20 is the output of a constant setting means 21 in which the output of the counter 16 is applied to one input via the decoder 18, and numerical data defining the upper limit of preset order forwarding, that is, the upper limit of the operating range of the counter 16 is set to the other input. is connected to the reset terminal R of the counter 16 so that when the output of the counter 16 exceeds the value of the constant setting means 21, an over signal is generated and the counter 16 is reset.

In the illustrated case, the preset storage capacity of the RAMIQ is 4 stations for each band, and the constant setting means 21 is set to a numerical value of 4°, and is configured to be reset when the counter 16 counts up to 4. has been done.

OR3 is an OR gate whose input is the output of the decoder 19 and whose output is connected to the preset enable terminal PE of the counter 16, and presets the output of the decoder 19 to the counter 16 when the preset keys P1 to P4 are operated.

Further, OR4 is an OR gate which inputs the output of the delay circuit 14.15 and the address signals S0 to S4, and whose output is connected to the preset enable terminal PE of the frequency division ratio setting means 8. RAMIQ
It acts to preset the data in the frequency division ratio setting means 8.

Next, the operation of the present invention having such a configuration will be explained.

First, a description will be given of the last received station storage function that allows reception of the station that was previously received when switching bands.

Here, it is assumed that a 1000 KHz broadcast in the AM band is currently being received.

Then, when the FM band key 12 is operated, the write signal W
1 and an AM address signal Nλ are generated, and the data of 1000K H2 of the frequency division ratio setting means 8 is stored at the address A.

Then, by the output of the delay circuit 15 that occurs thereafter, the FM
Address F is selected and the data of FM address F is preset in the frequency division ratio setting means 8.

Therefore, for example, if 80.0 MHz data is received, an 80.0 MHz station will be received.

To receive broadcasts of tropic frequencies, press start key 2.
This is possible by operating the sweep pulse generating circuit 9 and varying the value of the frequency division ratio setting means 8 according to 2, and assume that, for example, a station of 85.0 MHz is being received in this way.

So, when I tried to receive the AM broadcast again (when I operated the m-band key 13, the write signal WI3 and the FM address signal AD6 were generated, and the 85.0 MH signal was sent to the FM address F.
At the same time as the data of AM address A is stored, the clear address A is selected by the output of the delay circuit 14 generated thereafter, and the 1000 KHz data of the AM address A is preset in the frequency division ratio setting means 8.

Thus, the AM that was being received before switching to the FM band
Stations on the band 1000K H2 can be received again.

Thereafter, in the same manner, each time you select a band, you can receive the station that you previously received.

Next, a preset function for storing receiving stations in RAMIQ will be explained.

At this time, after operating the memory key M in advance to set RAMl0 to a writable state, operating the start key 22 to generate a sweep pulse from the sweep pulse generation circuit 9, change the value of the frequency division ratio setting means 8, and select a channel. start.

When received during channel selection, the pulse generation of the sweep pulse generation circuit 9 is stopped by the generation of the reception detection signal S, and the frequency division ratio setting means 8 is held at the value at that time.

If you wish to memorize the station currently being received, for example, by operating the first preset key P1, the counter 16 is preset with the numerical value "Po" from the decoder 19, and the output of the counter 16 is sent to the decoder 18 as an address signal. If it is currently switched to the FM band, AND gate A3 is opened and the RAM is converted to S1.
The B address of IQ is selected, and the numerical data of the frequency division ratio setting means 8 is stored in the B address of RAMIQ.

When storing another station, use the same operation, first operate the start key 22 to change the value of the frequency division ratio setting means 8, and after receiving it, operate another preset key.
The value of the frequency division ratio setting means 8 is stored in the address of RAM10 specified by the preset key.

In this way, by combining the FM and AM band keys 12.13 and the preset keys P□ to P4, it is possible to store four receiving stations for each band in the RAMIQ.

After the data has been stored in RAMIQ, by releasing memory key M, the write-enabled state of RAM 10 is released.
Set to read state.

Next, the operation of calling a receiving station stored in RAMIQ will be explained.

The calling operation can be performed by operating the preset keys P, -P and the preset order feeder -PA, but first, the calling operation by operating the preset keys P1 to P4 will be explained.

For example, if the FM band key 12 is now operated and the FM band reception state is in progress, and the second preset key P2 is operated, the counter 16 will receive the value "2°" from the decoder 19.
By presetting .degree., an address signal S2 is generated from the decoder 18, and an AND gate A4 is opened, thereby selecting address C in the RAM10.

The numerical data of this selected C address is OR gate OR
A preset enable signal is generated from 4 and preset in the frequency division ratio setting means 8, and this value is transferred to the programmable frequency divider 3, so that the PLL 2 is operated with the data stored at address C, to receive stations stored in the .

The address signal S specified by the preset key operated in the same way with other preset keys P□9 P39 P4 operation.

S3. When S4 occurs, AND gate A3. A5. A6 is opened, addresses B, D, and E where FM broadcast data of RAMI Q is set are selected, and the data of the selected addresses is preset in the frequency division ratio setting means 8, and the reception of the stored station is performed. will be carried out.

The same goes for the AM band; by selecting AND game) A7 to Ale using the combination of AM band key 13 and preset keys P1 to P4, addresses G to J where AM broadcast data is set can be arbitrarily selected. You can choose.

Incidentally, when operating these preset keys P1 to P4, an address signal S is generated.

is not generated, it is not possible to call addresses A and F that store the broadcast data that was previously received.

Next, the calling operation using the preset forward key PA will be explained.

Each time the preset forward key PA is operated, a pulse is generated from the one-shot multi-by-break 17, and the counter 16 is counted up by 1, and the address signal S from the decoder 18 is generated.

-3, are generated sequentially. Therefore, for example, in the AM band, by operating the preset key P2, the RAMIQ
Assuming that the station at the address is being received, if you operate the preset forward key PA, the counter 16 will increase by 1 from the set value of °゛2゛ by operating the preset key P2.
3', the address signal S3 is generated from the decoder 18, the AND gate A9 is opened, and the address (2) of RAMIQ is selected.

Subsequently, when the preset forward key PA is operated, the counter 16 becomes "4" and address J of RAMIQ is selected in the same manner.

Further, when the preset order feeder-PA is operated, the counter 16 becomes "°5", which exceeds the set value "°4" of the constant setting means 21, and an over signal is generated from the comparator circuit 20, and the counter 16 becomes "°5". will be reset.

When the counter 16 is reset, the decoder 18 outputs the address signal S.

is generated and the AND gate A1 is opened, thereby selecting the address A where the previously received broadcast data called at the time of band switching is stored.

Thereafter, by operating the preset forward key PA, the addresses A, G-J where the broadcast data of the frequency bands are stored can be sequentially cycled through and recalled.

Similarly for the FM band, addresses F and BE where 1M broadcast data is stored can be called up cyclically by operating the preset forward key PA.

In this way, addresses A and F, which could not be called by operating the preset keys P1 to P4, can be called up.

As described above, the band preset receiver of the present invention includes a storage means for storing reception station data set in correspondence with a preset key and reception station data immediately before band switching, and a storage means for writing the reception station data in the storage means. In the multi-band preset receiver, the control means includes an address selection means for selecting an address of the storage means based on a number input by the preset key, and a control means for controlling readout. When a single operation key is operated, a preset sequential forwarding key means that sequentially counts and calls instead of a preset key, and a preset sequential forwarding key means that a counted value different from the input number of the preset key is obtained. Since the detection means detects this and operates the address selection means to read the reception station data immediately before the band switching, it is possible to effectively utilize the stored data that is not used except when switching the band. This is essentially the same as having one more station preset than the number of presets, which contributes to increasing the added value of the product, and has extremely great practical value.

[Brief explanation of drawings]

FIGS. 1 and 2 are diagrams showing the configuration of the main parts of the multi-band preset receiver of the present invention. DESCRIPTION OF SYMBOLS 1...Local oscillation circuit, 1...P ratio, Divide ratio setting means, 10...Storage device, 11... Control circuit, 12...FM band key, 13...AM band key, PA...
...Preset sequential feed mechanism, P1 to P4...
・Preset key, M...Memory key.

Claims (1)

[Claims for Utility Model Registration] Storage means for storing receiving station data set in correspondence with a preset key and receiving station data immediately before band switching;
In the multi-band preset receiver, the multi-band preset receiver includes a control means for controlling writing and reading of the receiving station data in the storage means, wherein the control means selects an address of the storage means based on an input number of a preset key. a selection means; a preset sequential readout means for sequentially counting and reading out numbers input by the preset keys in place of the preset keys by operating a single operation key; and the preset sequential readout means; A band preset receiver comprising a detection means for detecting that a count value is different from a key input number and operating the address selection means to read reception station data immediately before the band switching.