JPS5919468Y2 - Receiving machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a receiver equipped with a storage device and capable of electronically setting a receiving station.

As a receiver that performs electronic presetting in this way,
Recently, synthesizer receivers as shown in FIG. 1 have been widely used.

That is, the local oscillation circuit 1 of the receiver is configured with a PLL 2, and the PL
The frequency division ratio N of the programmable frequency divider 3 that constitutes L2 is
The voltage controlled oscillator 5 generates and tunes a predetermined local oscillation frequency fO, which is changed by the frequency division ratio setting means 4 connected in parallel. It is composed of a counter that counts pulses, and automatic sweeping can be performed by controlling the pulse generation of the sweep pulse generation circuit 6 using a sweep start key 7, a sweep stop key 8, and a reception detection signal S.

Furthermore, a storage device 9 such as a RAM (random access memory) is provided, and a memory key M and preset keys P1 to
By specifying an address in the RAM 9 using P5 and writing the data of the frequency division ratio setting means 4 to the specified address, preset tuning can be performed.

By the way, when configuring such a synthesizer receiver to be mounted on a vehicle, it is difficult to install as many control keys as described above due to the limited mounting space, and improvements have been desired.

Therefore, the present invention was devised in view of this point, and focused on the fact that the sweep stop key 8 that controls the sweep pulse generation circuit 6 has no effect in the receiving state, and the sweep stop key 8 is also used as a memory key. The present invention provides a receiver characterized by the following features.

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

Note that the same components as in FIG. 1 are indicated by the same figure numbers.

A sweep pulse generation circuit 6 is connected to a pulse oscillator 10, a one-shot multi-by-break-11 that operates upon the generation of a reception detection signal S, an inverter 12 that inverts its output, and a sweep start key 7 connected to a set terminal to perform a sweep operation. Flip-flop 13 with stop key 8 connected to reset terminal
, the pulse oscillator 10, an inverter 12, and an AND gate 14 whose input is a flip-flop and whose output is connected to the frequency division ratio setting means 4.

Further, the key signal of the sweep stop key 8 is applied to the write signal terminals W1 to W5 of the storage device 9.

Therefore, in the receiver of the present invention having such a configuration, when the sweep start key 7 is operated, the flip-flop 13 is set and the AND gate 14 is opened.
The oscillation pulses from the pulse oscillator 10 are input to the frequency division ratio setting means 4 and are counted by the frequency division ratio setting means 4. At the same time, the frequency division ratio N of the program frequency divider 3 is changed and the sweep is started. Ru.

When a broadcast is received during sweeping, the one-shot multivibrator 11 is activated by the generation of the reception detection signal S to generate an output for a predetermined period of time, and the inverter 12 closes the AND gate 14 during that period.

Therefore, it is possible to listen to stations received during that time.

However, after a predetermined period determined by the one-shot multivibrator 11 has elapsed, the AND gate 14 is opened again, and a pulse is input to the frequency division ratio setting means 4 to start sweeping again.

This is the so-called pause function in automatic sweep. If you want to continue receiving the station you are currently receiving during pause, operate the sweep stop key 8 to reset the flip-flop 13 and close the AND gate 14. Frequency division ratio setting means 4
By cutting off the pulse input to the receiver, continuous reception is possible.

Next, in the preset operation of storing the station being received in the storage device 9 as described above, first operate the sweep stop key 8 to generate write signals W1 to W5, and set the storage device 9 to a writable state. Thereafter, by operating a desired key among the preset keys P1 to P5, the value of the frequency division ratio setting means 4 is stored at the address selected by the operated briquette key.

Therefore, for example, when preset key P1 is operated,
The A address is selected by the generation of the address signal AD1, and the value of the frequency division ratio setting means 4, ie, the station currently being received, is stored at the A address.

By repeating the sweep operation and preset operation in this way, up to five receiving stations can be stored in the case shown.

Note that when the sweep stop key 8 is operated, a signal for resetting the flip-flop 13 and a write signal W1 for the storage device 9 are generated.
~W5 are generated at the same time, but if they are operated during the sweep, since the preset keys P1 to P5 are not operated at the same time, they act as a reset signal for the flip-flop 13 and have no effect on the storage device 9. .

On the other hand, when operated during reception, since the flip-flop 13 has already been reset, it acts as write signals W1 to W5 and has no effect on the flip-flop 13.

When calling up a station stored in this manner, by operating a desired preset key, the data at the selected address in the storage device 9 is set by the frequency division ratio setting means 4 upon generation of the preset enable signal PE. The station that was read out and stored is received.

In the above explanation, when writing to the storage device 9, it is necessary to operate the sweep stop key 8 and the preset keys P1 to P5 at the same time. , if these outputs are used as write signals W1 to W5, simultaneous operations are not required and the operation is simplified.

As mentioned above, in the receiver of the present invention, the sweep stop key, which does not function during reception, doubles as a memory key, and is suitable for vehicle-mounted receivers where installation space is limited.

[Brief explanation of the drawing]

Figure 1 shows a conventional example of a synthesizer receiver, Figure 2 shows a conventional example of a synthesizer receiver.
The figure shows the configuration of a receiver according to the present invention.・・・Local oscillation circuit, 2・・・・PLL, 4
. . . Frequency division ratio setting means, 6 . . . Sweep pulse generation circuit, 9 . . . Storage device.

Claims (1)

[Scope of utility model registration request] It has a sweep function that starts the sweep by operating the sweep start key and stops the sweep by operating the sweep stop key.It also has a sweep function that starts sweeping by operating the sweep start key and stops the sweep by operating the sweep stop key. 1. A receiver equipped with a memory function for calling up a certain receiving station, characterized in that the receiver is equipped with means for making the memory device into a writable state by operating the sweep stop key.