JPS6012349Y2 - preset receiver - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a preset receiver equipped with a storage device and capable of electronically storing a plurality of receiving stations, and in particular, the present invention relates to a preset receiver that is equipped with a storage device and is capable of electronically storing a plurality of receiving stations. The present invention relates to a preset receiver characterized by having a preset forwarding function that can be recalled.

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

The figure shows a receiver in which a local oscillation circuit 1 is composed of a PLL synthesizer 2, and by changing the division ratio N of a programmable frequency divider 3 that constitutes the PLL 2, the necessary local oscillation frequency can be obtained from a voltage controlled oscillator 4. f, is generated as appropriate to perform channel selection.

Reference numeral 5 denotes a frequency division ratio setting means connected in parallel to the programmable frequency divider 3 and changing the frequency division ratio of the programmable frequency divider by counting the sweep pulses from the sweep pulse generator 6, which is composed of a counter. has been done.

7 is generally a RAM (RAM) that stores the value of the dividing ratio setting means 5.
A storage device consisting of a random access memory (random access memory), which can store up to 5 stations in the case shown in the figure, each address is selected by address signals AD, ~AD5, and write signals W1 ~ W, by operating a memory key M. The configuration is such that when the signal is generated, it is stored in the selected address of the frequency division ratio setting means 5.

Reference numeral 8 denotes a control circuit that receives signals from the preset keys P1 to P5, the preset sequential key PA, and the sweep start key ST, and controls the recording frequency division ratio setting means 5, the sweep pulse generator 6, and the RAM 7; 9 is a preset sequential key; It is an up counter that counts the pulses generated from the one-shot multi-by-break-10 every time the PA is operated, and the counting output is sent to the decoder 11 as the respective address signals AD□ to AD,
By operating the preset forward key PA and increasing the counting output by 1,
Address signals AD□, D2, .

Also, the preset manual power of this up counter 9 J1~J,
, preset keys P1 to P5 are connected via a decoder 12, and the selected preset key signal is converted into a corresponding numerical value by the decoder 12 and sent to the counter 9.
For example, when the third preset key P3 is operated, the decoder 12 presets the number "3" to the counter 9, and the decoder 11 specifies the address. Signal AD3 is generated and address C is selected.

13, the output of counter 9 is connected to decoder 1 on one input.
1, and the output of the counter 9 is added to the output of the constant setting means 14 in which the numerical data defining the upper limit of preset forwarding, that is, the upper limit of the operating range of the counter 9 is set to the other input. is the constant setting means 14
When the counter 9 matches the value of , it generates a match signal and resets the counter 9 through the OR gate 15
It is connected to the reset terminal R of.

In the illustrated case, since the storage capacity of the RAM 7 is 5 stations, the constant setting means 14 contains the value "5".

is set and is configured to be reset when the counter 9 counts up to "5".

16 is an OR gate whose input is the output of the decoder 12, and whose output is the preset enable terminal PE of the counter 9.
It is also connected to the preset enable terminal PE of the frequency division ratio setting means 5 via the OR gate 17, and when the preset keys P1 to P5 are operated, it presets the output of the decoder 12 to the counter 9, and
It acts to preset the address data of the selected RAM 7 in the frequency division ratio setting means 5.

Also, the output of one-shot multivibrator-10 is OR
It is connected to the other input of the gate 17, and is configured such that the data in the RAM 7 is also preset in the frequency division ratio setting means 5 by operating the preset forward key PA.

Further, the signal from the sweep start key ST is connected to the sweep pulse generation circuit 6, and the sweep pulse generation circuit 6, which stops generating pulses during reception, is controlled to generate pulses by operating the sweep start key ST. It is connected to the reset terminal R of the counter 9 via the OR gate 15, and is configured to reset the counter 9 at the start of the sweep.

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

First, the operation of storing receiving stations in the RAM 7 will be explained.

At this time, after operating the memory key M in advance to set the RAM 7 to a writable state, operating the sweep start key ST to generate a sweep pulse from the sweep pulse generation circuit 6, and changing the value of the frequency division ratio setting means 5 to select the Start the station.

When a channel is received during channel selection, the pulse generation of the sweep pulse generation circuit 6 is stopped by the generation of the reception detection signal S, and the frequency division ratio setting means 5
is held at its current value.

If you wish to memorize the station currently being received, for example, by operating the first preset key P□, the value "1" will be preset to the counter 9 from the decoder 12.
Further, by converting the output of the counter 9 into an address signal AD1 by the decoder 11, address A of the RAM 7 is selected, and the numerical data of the frequency division ratio setting means 5 is stored in the RAM.
It is stored at address A of 7.

When storing another station, use the same operation, first operate the sweep start key ST to change the value of the division ratio setting means 5, and after receiving it, operate another preset key.
The value of the frequency division ratio setting means 5 is stored at the address specified by the preset key.

In this way, up to five receiving stations can be stored in the RAM 7.

After the storage in the RAM 7 is completed, by releasing the memory key M, the write enabled state of the RAM 7 is released and the RAM 7 is set to the read state.

Next, the operation of calling the receiving station stored in the RAM 7 will be explained.

The calling operation can be performed by operating the preset keys P1 to P5 and the preset forwarding key PA, but first, the calling operation by operating the preset keys P1 to P will be explained.

For example, when the second preset key P2 is operated, the counter 9 is preset with the value 2 from the decoder 12, and the address signal AD is sent from the decoder 11.
2 is generated and address B of RAM 7 is selected.

A preset enable signal is generated from the OR gate 17, and this numerical data of the selected address B is preset in the frequency division ratio setting means 5, and this value is transferred to the programmable frequency divider 3, so that the PLL 2 It operates with the data stored at the address and receives the station stored at address B.

When other preset keys are operated in the same way, the address in RAM 7 specified by the operated preset key is selected, the data at the selected address is preset in the frequency division ratio setting means 5, and reception of the stored station is performed. It is done.

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

When the preset forward key PA is operated, the one-shot multivibrator 10 generates a pulse to increment the counter 9 by 1 each time it is operated, and the address signals AD to AD5 from the decoder 11 are sequentially generated.

Therefore, for example, by operating preset key P2, R
Assuming that the station at address B of AM7 is being received, and if the preset forward key PA is operated here, the counter 9 increases by 1 from the set value of "2" set by operating the preset key P2 to "3", and the decoder 11 address signal A from
D3 is generated and address C of RAM 7 is selected.

Subsequently, when the preset forward key PA is operated, the counter 9 changes to °°4' and address D of the RAM 7 is selected.

Similarly, when the last address E of the RAM 7 is selected, that is, when the counter 9 reaches "5", a coincidence output is generated from the coincidence circuit 13, and by resetting the counter 9, after selecting the address E, the preset order is sent. key pa
When you operate counter 9 becomes “1゛°” and RAM7
The first address A is selected.

Thus, by operating the preset forward key PA, RAM7
memory addresses A to E can be sequentially recalled.

Since the counter 9 is configured to be reset by operating the sweep start key ST, once the sweep start key ST is operated, if the preset forward key PA is operated,
Sequential forwarding is performed from the first address A in the RAM 7.

Therefore, if you have been receiving presets up until now, then operate the sweep start key ST to receive them, and then operate the preset forward key PA to receive presets, the first address A will always be selected. Preferable sequential feeding can be performed.

As mentioned above, the preset receiver of the present invention is equipped with a preset forwarding function that allows memory addresses to be called up sequentially with a single operation key, and by resetting the preset forwarding function with a sweep start operation, once the sweep start operation is performed, the preset forwarding function is reset. When a preset is entered, sequential forwarding starts from the first address of the storage device, which improves the operability of preset sequential forwarding and has a great practical effect.

[Brief explanation of the drawing]

The drawing is a diagram showing the configuration of a preset receiver according to the present invention. 2...PLL, 5...Dividing ratio setting means, 6...Sweep pulse generation circuit, 7...
・Storage device, control circuit, P1 to P,...
...Preset key, PA...Preset order key, M...Memory key, ST...
...Sweep start key.

Claims (1)

[Claims for Utility Model Registration] 1. A sweep means having an operation key for starting a sweep and searching for at least a receiving station, a storage means for storing data of a plurality of reception stations, and a sweep means for storing data of a plurality of reception stations, and a sweep means having an operation key for starting a sweep, and a storage means for storing data of a plurality of reception stations; A preset receiver comprising: a preset forwarding means for sequentially recalling data stored in the means; and a reset means for resetting the preset forwarding means in response to a sweep start operation by an operation key of the sweep means. 2. Utility model registration claim 1, wherein the preset sequential feeding means sequentially calls stored data by a counter means, and the resetting means resets the counter means by an operation key of a sweep means. Preset receiver listed.