JPH0447760Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention plays a melody corresponding to a melody signal output from a melody signal processing circuit, more specifically a melody signal generation circuit, and
This invention relates to a melody signal processing circuit formed to perform other optical or mechanical operations in synchronization with the melody.

[Prior Art] Conventionally, greeting cards, toys, watches, and the like have been provided with built-in melody signal generation circuits to generate music, signals, and the like.

The melody signal generation circuit used here has a built-in oscillation circuit, frequency dividing circuit, performance memory circuit, etc. for generating melody signals, and generates the performance signal of the song according to the song pre-programmed in the memory circuit. It is something that occurs.

Recently, other operations have been started in synchronization with the melody tempo of such a melody signal generation circuit.
For example, devices have also been provided that allow lighting of a light emitting diode or mechanical operation using an electromagnetic solenoid.

In order to perform such other operations, the operation procedure is stored in the operation memory circuit inside the melody signal generation circuit, and the output from this operation memory circuit lights up the light emitting diode or turns on the electromagnetic This was used to operate the solenoids.

[Problems to be Solved by the Invention] However, with such conventional means, the performance memory program and the working memory program must be stored in the memory circuit of the melody signal generating circuit.

For this reason, in a melody signal generating circuit having a small storage capacity, as the working memory program is stored, the number of pieces to be played has decreased, and the operation itself has had to be simplified.

Therefore, the present invention provides a melody signal processing circuit that makes it possible to increase the number of pieces to be played by enriching the performance memory program inside the melody signal generation circuit without providing a working memory program in the melody signal generation circuit itself. The purpose is to do.

[Means for solving the problems] In order to solve the above-mentioned problems, the present invention has the following features:
The electroacoustic transducer is driven by a melody signal with a pause period from the melody signal generation circuit, and the same melody signal is supplied to a smoothing circuit that smooths the melody signal to smooth out the pause section present in the melody signal. A smoothed signal having a waveform corresponding to is formed, this smoothed signal is supplied to a pulse forming circuit to obtain a waveform-shaped drive signal, and this drive signal is formed to be used as an operation signal. .

[Function] According to the present invention, a melody signal from a melody signal generation circuit provided with a pause section is used to operate an electroacoustic transducer to play a melody.

On the other hand, a melody signal having a pause section is smoothed by a smoothing circuit, and is further supplied to a pulse forming circuit to extract a drive signal, which is used as an operation signal.

That is, the operation signal is obtained from the pause period provided in the melody signal.

Therefore, when storing a melody signal in the melody signal generation circuit, the melody signal can be used as an operation signal by simply setting an extremely short pause section in the melody signal. All of the memory circuits inside can be used as circuits for melody signals.

[Embodiment] FIG. 1 is a circuit diagram showing an embodiment of the present invention.

In this embodiment, the melody signal generation circuit 10
The output end of the diode D is connected to the electroacoustic transducer 11 and the rectifying diode D, and the output end of the diode D is connected to the pulse forming circuit 13 via the smoothing circuit 12.
It is connected to. Further, the output terminal of this pulse forming circuit 13 is connected to the base of the switching transistor TR. Furthermore, a light emitting diode LED is connected between the collector of this switching transistor TR and the power supply Vcc.

The melody signal generation circuit 10 consists of an oscillation circuit, a frequency dividing circuit, a performance storage circuit, etc. for generating melody signals, and in this embodiment, each of these circuits is integrated into an IC.
It uses a melody chip that has been transformed into a melody chip.

Further, the signal output from the melody signal generating circuit 10 has a pause section t, as shown in FIG. 2A. This pause section t is about 5~
It is 20msec. Also, the interval of this pause section t is
It is possible to have an interval after a plurality of consecutive notes, that is, to match a change in melody, or there may be a plurality of rest periods t between a single note.

The electroacoustic transducer 11 plays music based on the output signal from the melody signal generating circuit 10, and although a piezoelectric buzzer PB is used in the embodiment, other devices such as a speaker may also be used. You can also do that.

The smoothing circuit 12 is formed by connecting a capacitor C and a resistor R1 in parallel.

The signal output from the melody signal generating circuit 10 becomes a smooth signal as shown in FIG. 2B by passing through the diode D and the smoothing circuit 12.

Furthermore, the signal smoothed in this manner is input to the pulse forming circuit 13. This pulse forming circuit 1
3, a one-shot circuit is used in the embodiment, but in addition to this one-shot circuit, a pulse forming circuit using an operational amplifier or the like may be used.

The width of the waveform output from this pulse forming circuit 13, that is, the operating time T, is as shown in FIG.
It is determined by the constant of the pulse forming circuit 13.
By the way, in the example, the operation time T is 100~
It is set to 200msec.

In the embodiment, the melody signal input to the electroacoustic transducer 11 has a pause period t of 5 to 20 msec, as shown in FIG. 2A. However, in the pause period t of this extent, when listening to music etc. from the electroacoustic transducer 11, the melody can be heard continuously.

Therefore, the pause section t can be provided to match the change in the melody, or even if it is formed so that a plurality of pause sections t are provided within a single note,
The pause section t does not impair musicality.

Further, in the embodiment, the light emitting diode LED is turned on according to the pause section t provided in the melody signal. However, since the pause period t in the melody signal is as short as 5 to 20 msec, the light emitting diode LED cannot be sufficiently illuminated as it is.
Since the operating time T is 100 to 200 msec, the light emitting diode LED is also sufficiently lit.

In the above description, the case where the operating signal is used as an operating signal for a light emitting diode LED is taken as an example, but the operating signal can also be used as an operating signal for an electromagnetic solenoid. In this case, for example, a melody can be generated from the doll and the doll can be made to perform predetermined movements in accordance with the melody. In addition to electromagnetic solenoids, it is also possible to operate motors and the like.

Of course, it is also possible to take out a plurality of actuation signals and operate the light emitting diode, electromagnetic solenoid, motor, etc. using one operation signal or by using a plurality of operation signals.

[Effects of the invention] As explained above, in the present invention, the melody signal generation circuit itself does not have an operation memory circuit, and the operation is performed by the melody signal from the performance memory circuit inside the melody signal generation circuit. Even with the same storage capacity, it is possible to significantly increase the number of pieces to be played. Furthermore, Melody IC
It is also reasonable in the production of products that utilize it, as it can be shared synchronously or asynchronously.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a waveform diagram for explaining the circuit. 10... Melody forming circuit, 11... Electro-acoustic transducer, 12... Smoothing circuit, 13... Pulse forming circuit, t... Rest section.

Claims (1)

[Claims for Utility Model Registration] 1. Driving an electroacoustic transducer with a melody signal provided with a rest period from a melody signal generation circuit, and supplying the same melody signal to a smoothing circuit for smoothing, A smoothed signal having a waveform corresponding to the pause section existing in the melody signal is formed, this smoothed signal is supplied to a pulse forming circuit to obtain a waveform-shaped drive signal, and this drive signal is used as an operating signal. A melody signal processing circuit characterized in that it is formed as follows. 2. The melody signal processing circuit according to claim 1, wherein the pause period is extremely short, from 5 to 20 msec. 3 Utility model registration claim paragraph 1 or 2 that uses a piezoelectric buzzer as an electroacoustic transducer
The melody signal processing circuit described in . 4. The melody signal processing circuit according to claim 1, 2, or 3 of the utility model registration claim, which uses a one-shot circuit as a pulse forming circuit. 5. The melody signal processing circuit according to claim 1, 2, 3, or 4, which uses an operation signal as an operation signal for a light emitting element. 6 Utility model registration claims in which the operating signal is used as an operating signal for an electromagnetic solenoid Paragraphs 1 and 2
4. The melody signal processing circuit according to item 1, 3 or 4.