JPS6158311A - Synthesizer receiver - Google Patents

Abstract

PURPOSE:To easily change a frequency for making priority reception, by exerting a priority function when a numeral key and priority key are simultaneously depressed. CONSTITUTION:A memory 33, priority key 44, and numeral keys 41 are provided. When the priority key 44 and one of the numeral keys 41 are simultaneously depressed, data corresponding to the numeral key are stored in the PRTY address of the memory 33. When a priority function is set to the turned-on condition, the data are fetched from the PRTY address of the memory 33 and a corresponding frequency is selected in accordance with the fetched data. Therefore, the frequency for making priority reception can be changed easily.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a synthesizer type receiver.

[Conventional technology]

In a synthesizer type receiver, a local oscillation circuit is constituted by a PLL, and radio waves of a desired frequency can be received by changing the frequency division ratio of a variable frequency divider circuit included in the PLL.

Some synthesizer type receivers have numeric keys (numeric keys) and are capable of presetting reception frequencies on each of the numeric keys.

That is, for example, when a broadcast with a frequency of 1234kllz is received, and in this receiving state, if you press the memory key while holding down key "9" on the numeric keypad, the data of the PLL frequency division ratio at this time will be stored at address 8009 in the memory. "1 strike" was taken.

The same goes for the other keys "0" to "18", and the data of the PLL frequency division ratio at that time is stored in the memory from 00 to 18.
Each is stored at address 8008.

Therefore, from now on, if you press the key "9" on the numeric keypad, the frequency 1 preset to this key "9" will be activated.
234kllz is selected, and similar preset selection is performed for other keys "0" to "8".

By the way, among such synthesizer receivers having a numeric keypad, some also have a priority function. In other words, this priority function means that if you don't want to miss a particular station, you can turn on the priority switch (key) and automatically listen to that particular station every 3 seconds, for example, even when other stations are being received. When you select a station and that particular station is not transmitting, it returns to the original station, but when that particular station is transmitting,
After that, it is a function to continue receiving that specific station. Therefore, according to this priority function, it is possible to quickly and reliably catch radio waves that are irregularly transmitted such as aviation radio and emergency communications.

[Problem that the invention seeks to solve]

The conventional priority function is lfj < only for the frequency preset to key rlJ of the numeric keypad, and priority reception cannot be performed for frequencies preset to other keys rOJ, r2J to "9". There wasn't. Therefore, when changing the frequency for priority reception, it is necessary to change the frequency preset to key "1" on the numeric keypad, which is a very complicated operation. Also, at this time, in order to exchange the frequency preset for key rlJ of the numeric keypad with the frequency preset for another key (the new priority receiving frequency), you need to remember that frequency. If you do this incorrectly, you will not be able to receive messages.

Means for solving problem C] A memory (33), a priority key (44) and a numerical key (41) are provided, and the priority key (4) is provided.
4) and one of the numeric keys (41) are pressed at the same time, the data corresponding to the pressed numeric key is stored in the PRTY address, which is a predetermined address in the memory (33), and the priority function is activated. When it is turned on, data is retrieved from the PRTV address in the memory (33), and the corresponding frequency is selected based on the retrieved data.

[Effect]

When the priority key (44) and one of the number keys (41) are pressed at the same time, the data corresponding to the pressed number key is stored in the PRTV memory (33).
When the priority function is turned on, data is retrieved from the PRTV address in the memory (33), and the corresponding frequency is selected based on the retrieved data.

〔Example〕

In Fig. 1, the symbol indicates the receiving system, and the antenna (11)
The received signal is supplied to the mixer circuit (13) through the preselector (12), and a local oscillation signal of a predetermined frequency is formed in the PLL (14), and this signal is supplied to the mixer circuit (13). Only the signals at the frequencies desired to be received are converted to intermediate frequency signals. and,
This intermediate frequency signal is supplied to the demodulation circuit (16) through the intermediate frequency amplifier (15), and the audio signals are converted to f, f tN
This signal passes through the squelch circuit (squelch gate circuit 1) (17) and then to the low frequency amplifier (18).
is supplied to the speaker (19) through.

Further, the intermediate frequency signal from the intermediate frequency amplifier (15) is supplied to the detection circuit (21) and is converted into a DC signal 5GNL having a level corresponding to the reception level, and this signal 5GNL is converted into the voltage comparison circuit II! 8 (22) and a setting signal SQ for setting the squelch bell from the variable resistor (23).
is supplied to the compressing circuit (22), and its comparison output COMP
is supplied to the microcomputer (30).

This microcomputer (30) constitutes a control circuit for channel selection, etc. In the microcomputer (30), (31) is 4
BIT's CPU (32) is a ROM and Miko's ROM (3
In 2), a program for channel selection etc. is written, and routines (60) and (70) of the flowcharts shown in FIGS. 2 and 3 are written.

Further, in the microcomputer (30), (33) is a RAM for a work area, (34) is an output port, and (35) is an input port. This microcomputer (30) has a numeric keypad (41), an enter key (42), a memory key (43), a priority key (44), a mode key (45), an LCD (50), and a digital display. Become a concubine. Note that the keys (41) to (45) are non-L tonk type push switches. In addition, the LCD (50) is
It is used to display the frequency, priority mode, etc.

Data at a predetermined frequency division ratio is taken out from the microcomputer (30) and supplied to the variable frequency division circuit (not shown) of the PLL (14), so that the local signal from the PLL (14) is The frequency is a local oscillation frequency corresponding to the frequency desired to be received as described above. In addition, a microcomputer (30
), a squelch control signal CTRL is formed based on the comparison output GOMP of the comparison circuit (22), and this is supplied to the squelch circuit (17) as its control signal.
Squelch is performed when GN signal is SQ.

Tuning and presetting are performed by the microcomputer (30) as follows.

That is, press the mode key (45), then press the numeric keypad (
41) in order of keys rlJ, r2J, r3J.

Press "4" and then press the enter key (42) to receive the division ratio data N for receiving the frequency 1234kHz.
i is formed, and this data Ni is stored in [1
It is stored in the UFR address and loaded into the variable frequency divider circuit of the PLL (14), so that from now on, the frequency 123
It becomes a reception state of 4kllz.

In addition, at this time, the reception level is thick (,5GNL>SQ
If so, a predetermined control signal CTRL is formed based on the comparison output COMP of the comparison circuit (22), and this signal CT
The squelch circuit (17) is turned off (squelch canceled) by RL. In addition, the reception level is small, 5GNL≦S
If Q, the squelch circuit (17) is activated by the signal CTRL.
is turned on (squelch operation).

Furthermore, at this time, for example, the key "9" on the numeric keypad (41)
” and press the memory key (43), the RAM (
33)-81] Data Ni of the frequency division ratio of the PLL (14) at this time is stored at address 09, and a frequency of 1234 kHz is preset to key "3" of the numeric keypad (41).

Then, when receiving other frequencies, and the numeric keypad (4
The same holds true when precenting frequencies to other keys in 1).

In addition, if the frequency is preset on the numeric keypad (41), for example, the key of the numeric keypad (41).

When you press "9", the division ratio data Ni is retrieved from address ADD9 of RAM (33), and this is stored in RAM (33).
is stored at the BUFR address of PLL (14).
Therefore, from now on, the frequency of 1234 kHz will be received.

Further, the frequency (numeric keypad) for priority reception is set by the routine (60) as follows.

That is, the routine (60) is called periodically at short intervals by a main routine (not shown). and,
When the routine (60) is called, step (61)
Next, in step (62), a check is made to see if the priority key (44) has been pressed, and if not, the process proceeds to step (69) and ends this routine (60). But,
When pressed, the process moves to step (62).

In this step (62), it is checked whether the priority key (44) and either the numeric keypad (41) are pressed at the same time, and if only the priority key (44) is pressed, the process continues to step Proceeding to (66), the priority flag FLG is inverted, that is, when the flag FLG has been sent, it is reset, and when it has been reset, it is set,
The routine then proceeds to step (69) and ends this routine (60). Therefore, when only the priority key (44) is pressed, the flag FLG is inverted each time it is pressed.

In addition, the priority key (44) and numeric keypad (41)
is pressed at the same time, for example, when the key "9" of the numeric keypad (41) is pressed at the same time, the process proceeds to step (64), and this step (
64), take out the division ratio data Ni from address D9 of RAM (33) and transfer it to l) RT of RAM (33).
Store at address Y. When any one of the ten keys (41) is pressed at the same time, the data of the frequency division ratio preset to the pressed key is stored in the PRTY address of the RAM (33). Therefore, by this step (64), data on the frequency division ratio of the frequency presented to any key of the numeric keypad (41) is stored in the PRTY address of the RAM (33).

Next, the process proceeds to step (65) to set the flag FLG, and in step (69) this routine (60
).

That is, according to this routine (60), each time the priority key (44) is pressed, the flag FLG is inverted, and when any of the numeric keys (41) is pressed while pressing the priority key (44), that press is The frequency data (frequency division ratio) preset on the numeric keypad is stored in the RAM (33), and a flag FLG is set.

Further, priority reception is performed by a routine (70).

The routine (70) is called by the main routine every three seconds, for example. And the routine (70
) is called, starts from step knob (71), then checks the priority flag FLC in step (72), and if the flag FLG is reset, the process advances to step (79) and performs this process. The routine (70) ends. Therefore, nothing is done when the priority flag FLG is reset.

However, when the flag FLC is set, the process proceeds to step (73) and the PRT of RAM (33)
The frequency division ratio data stored at address Y, for example data Ni, is taken out, and then in step (74) the data Ni is loaded into the PLL (14). Therefore, from this point on, the receiving system GO+ begins to receive the frequency of the data Ni, that is, the frequency 1234kllz preset to the key "9" of the numeric keypad (41).

Then, the process proceeds to step (75), and in this step (75), the frequency 123 is determined by the comparison output GOMP.
It is checked whether the 4kllz signal (broadcast) has been received, and when 5GNL<SQ, the process proceeds to step (76) and the original frequency division ratio stored in the BUFR address of RAM (33) is The data is retrieved, this data is loaded into the PLL (14), and the routine (70) is ended by step (79). Therefore, from the time of step (76), the original frequency reception state is resumed.

In other words, even if priority reception is performed every 3 seconds,
When no signal is received, it will immediately return to its original frequency.

However, when 5GNL≧SQ in step (75), the process proceeds to step (77), and in this step (77), the frequency division ratio data stored in the PRTY address of RAM (33), for example, data Ni, is R.A.
M (33) (7) The BUFR address is varnished, and then the flag FLG is reset in step (78), and this routine (70) is ended in step (79). Therefore, the reception state of the signal received in step (74) continues.

Therefore, the user can perform priority reception as follows.

That is, when the priority switch (44) is pressed,
The priority function is turned on and off each time it is pressed, so turn it on (this is displayed on the LCD (50)). Next, while pressing the priority key (44), press the key on the numeric keypad (41) that is preset for the desired frequency, for example, the key "9". Note that these are processed by the routine (60).

Thereafter, the routine (70) is executed every 3 seconds, so that if a signal is received at the frequency specified by the numeric keypad (41), the signal will be received.

Thus, according to the invention, step (64).

(73) etc., it is possible to give a priority function to any preset frequency on any key on the back of the numeric keypad (41) by simply pressing that key at the same time as the priority key (44).

Therefore, when changing the priority reception frequency,
This can easily be done by non-wealthy people.

In addition, at this time, there is no need to change the preset frequencies, so there is no need to memorize the frequencies each time (there is no trouble or anxiety caused by incorrect frequency changes. There is no need to install new knobs.

In addition, in the above, instead of storing the frequency division ratio at the PRTY address, neo data is stored for the pressed key of the numeric keypad (41), and when priority is received, the frequency division ratio is stored from the corresponding address using that data. Data may be obtained and loaded into the PLL (14).

〔Effect of the invention〕

For the frequency preset to any key on the numeric keypad (41), select that key as the priority key (
44) You can give the priority function by simply pressing the button at the same time, so if you want to change the frequency for priority reception, this can be done very easily.

Also, at this time, there is no need to change the preset frequencies, so there is no need to memorize the frequencies each time (and there is no trouble or anxiety caused by incorrect frequency changes.Furthermore, it is possible to determine the priority frequency. There is no need to provide a new knob for this purpose.

[Brief explanation of drawings]

The first circle is a system diagram of an example of the present invention, and FIGS. 2 and 3 are diagrams for explaining the same. α0) is the receiving system, (30) is the microcomputer, (41) to (4
5) is an operation key. Hidemori Matsukuma Figure 1 Figure 2

Claims (1)

[Claims] It has a memory, a priority key, and a numeric key,
When the priority key and one of the numeric keys are pressed at the same time, the data corresponding to the pressed numeric key is stored at a predetermined address in the memory, and when the priority function is turned on, , a synthesizer receiver that retrieves the data from the address of the memory and selects a corresponding frequency based on the retrieved data.