JP3063948B2 - Sound output device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a buzzer to output a key touch sound, an error sound in an erroneous operation, an end sound, and a ringing sound to a called party in an automatic switching mode between a facsimile apparatus and a telephone. Facsimile machine.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus using a buzzer has a key touch sound, an operation error sound, an end sound,
Then, all of the ring tones for calling the called party are output at the same volume.

FIG. 9 is a circuit diagram showing a conventional circuit.

In FIG. 1, a transistor Q21 is turned on.
Then, a ringing voltage Vo is applied to both ends of the buzzer 23. An operating frequency signal for sounding a buzzer is provided to the base of the transistor Q21 by the CPU 1.
Is entered from

[0005]

However, in the above conventional example, the key touch sound, the error sound, the end sound,
For example, when the ringing tone is increased for a user who has a low ringing tone and is difficult to hear, the key touch tone, the error tone, and the end tone are also increased at the same time, so that the ringing tone becomes loud. I will.

[0006] On the other hand, a user who has a loud key touch sound, an error sound, and an end sound and is difficult to use.
When those sounds are reduced, the ringing tone is also reduced, making it difficult to hear.

Accordingly, an object of the present invention is to provide a facsimile apparatus capable of outputting the above-mentioned key touch sound, error sound, end sound, and ringing sound at an appropriate volume.

[0008]

SUMMARY OF THE INVENTION The present invention provides an analog
Combine the tiplexer, volume and fixed resistor.
And increase the volume without increasing the number of amplifiers.
Sound that can change the volume
Sound output device that selectively switches between a sound that outputs a constant volume
It is a place.

[0009] The buzzer used here is, for example, a piezoelectric buzzer whose volume level increases in proportion to the applied voltage.

[0010]

FIG. 1 is a block diagram showing an outline of an apparatus according to a first embodiment of the present invention.

The CPU 1 is composed of a microprocessor or the like, and controls the entire facsimile apparatus in accordance with a program stored in the ROM 2.

The RAM 3 stores binarized image data read by the reading section 7 and analog waveforms input from the telephone line 10 via the NCU 9 and demodulated by the modem 8 as binarized data. .

The nonvolatile RAM 4 reliably stores data to be stored even when the power of the facsimile machine is cut off.

CG (character generator) 5
This is a ROM for storing characters such as IS codes and ASCII codes.

The recording unit 6 records and outputs the recording data stored in the RAM 3 as a hard copy.

The reading section 7 binarizes data read by using a CCD, and sequentially sends the binarized data to the RAM 3. It is to be noted that the filling state of the document in the reading unit 7 can be detected by a document sensor.
This document detection signal is input to CPU1.

The modem 8 controls R based on the control of the CPU 1.
The transmission data stored in AM3 is modulated, and NCU 9
Is output to the telephone line 10 via the Internet. further,
The modem 8 introduces an analog signal input from the telephone line 10 through the NCU 9, and demodulates the analog signal and stores it in the RAM 3.

The NCU 9 switches and connects the telephone line 10 to either the modem 8 or the telephone 11 under the control of the CPU 1.

The telephone 11 includes a handset, a speech network, a dialer, and the like.

The operation unit 12 includes keys for starting image transmission and reception, and fine, standard,
It is composed of a mode selection key for designating an operation mode such as automatic reception, a numeric keypad for dialing, and the like. Note that the CPU 1 detects the pressed states of these keys and controls the above-described units according to the detected states.

The display unit 13 is a liquid crystal display for displaying 16 digits, and displays predetermined characters under the control of the CPU 1.

The buzzer sound output section 14 is controlled by the CPU 1 to generate a key touch sound generated by pressing a key on the operation section 12.
An error sound at the time of erroneous operation, an end sound at the time of completion of the operation, and a ringing sound of the called party in the automatic switching mode between the facsimile machine and the telephone set 11 are output.

Next, the function of this embodiment will be described in detail.

FIG. 2 shows the buzzer sound output unit 14 of this embodiment.
FIG. 3 is a circuit diagram showing the configuration of FIG.

This circuit is a buzzer control circuit capable of outputting a ringing tone for calling the called party at a higher volume than the above-mentioned key touching tone, error tone, and end tone.

The buzzer 23 is a piezoelectric buzzer whose volume level increases in proportion to the magnitude of the input voltage. In addition,
Here, the input voltage of the buzzer is a voltage applied to the resistor R1.

Further, the buzzer 23 is designed to apply a voltage only at the time of sounding, and not to apply the voltage at other times. That is, when no sound is output, 0 V (LOW) is input from the CPU 1 to the base of the transistor 21 to turn off the transistor 21.

When outputting the above-mentioned key touch sound, error sound, and end sound, the relay 22 is connected to the contact A, and then the operating frequency signal is inputted from the CPU 1 to the transistor 21 to sound the buzzer 23. . At this time, R1
Is (R1 / R1 + R2) V ₀ .

When outputting a ringing tone for calling the called party, the relay 22 is connected to the contact B, and the same is applied to the contact C.
The operating frequency signal is input to the transistor 21 from the PU 1 and the buzzer 23 sounds. In this case, the voltage across the R1 is a V _0.

The volume level of the buzzer 23 is proportional to the voltage applied to R1. Therefore, V ₀ > (R1 / R1 + R2)
Than V _0, towards the ringing, key touch sound, it is to be output at a greater volume than the error sound, and end sound.

Next, as a second embodiment of the present invention, a buzzer control circuit which outputs a key touch sound, an error sound, an end sound, and a ringing sound independently and is capable of adjusting respective volume levels. Will be described.

FIG. 3 is a circuit diagram showing a configuration of the buzzer sound output section 14 of the second embodiment.

The buzzer 33 is provided in the same manner as in the first embodiment.
This is a piezoelectric buzzer, and the volume level increases in proportion to the magnitude of the input voltage. The input voltage of the buzzer is
This is a voltage applied to the resistor R1.

Further, the buzzer 33 is designed to apply a voltage only at the time of sounding, and not to apply the voltage at other times. That is, when no sound is output, 0 V (LOW) is input from the CPU 1 to the base of the transistor 31 to turn off the transistor 31.

The analog switch IC 32 selects one of the output terminals a to h when a control signal from the CPU 1 is input to the input terminals A, B, and C. FIG. 4 is an explanatory diagram showing the correspondence table.

For example, (A, B, C) = (0, 0, 0)
Is input, the analog switch IC 32 outputs the resistance R
2 and the collector of the transistor 31 are connected.

Next, the relationship between the resistors R2 to R8 is as follows: R2 <R
3 <R4 <R5 <R6 <R7 <R8. And R
The voltage applied to 1 decreases as the resistances R2 to R8 increase, and increases as the resistances R2 to R8 decrease. Accordingly, the volume of the buzzer is greatest when the selection pin of the analog switch IC 32 is h, and gradually decreases from a to g. That is, in the case of this circuit, eight levels of sound volume setting are possible.

The sound volume can be set for each of a key touch sound, an error sound, an end sound, and a ringing sound.

FIG. 5 is a flowchart showing the operation (in the case of a key touch sound) of the second embodiment.

When the buzzer is sounded by pressing a key on the operation unit (S1), the base of the transistor 31 is
The operating frequency signal from the PU1 is input (S3), but before the signal is input, a setting signal for each sound is input from the CPU 1 to A, B, and C of the analog switch IC 32 (S2). ).

Next, as a third embodiment of the present invention, it is possible to raise the input voltage of the buzzer to twice the reference voltage V ₀ and apply the same, and to make a key touch sound, an error sound, and an end sound. A buzzer control circuit configured to output at a sound volume level twice as high as that of the ringing tone will be described.

FIG. 6 is a circuit diagram showing the configuration of the buzzer sound output section 14 of the third embodiment.

The buzzer 54 is similar to the first embodiment,
This is a voltage-type buzzer, and the volume level increases in proportion to the magnitude of the input voltage. Here, the input voltage of the buzzer depends on the output voltages of the amplifiers 52 and 53.

These amplifiers 52 and 53 are for a single power supply, and the power supply is V ₀ . The operating frequency signal of the buzzer 54 is input from the CPU 1 to the plus terminal of the amplifier 52 and the minus terminal of the amplifier 53. The amplifiers 52 and 53 output 0 V when 0 V is input to two input terminals.

The transistor 51 is for separately outputting the three sounds of the key touch sound, the error sound and the end sound and the volume of the ringing sound.

To increase the volume, the control signal from the CPU 1 is set to 0V (LOW), and the input voltage of the minus terminal of the amplifier 52 and the plus terminal of the amplifier 53 is set to 2.5V.
To Then, the plus terminal of the amplifier 52 and the amplifier 53
The operating frequency signal from the CPU 1 is input to the minus terminal of.

When this signal is 5 V, the output of the amplifier 52 is V ₀ and the output of the amplifier 53 is ₀ V. When the signal is ₀ V, the outputs of the amplifiers 52 and 53 are reversed, but with reference to the B terminal of the buzzer 54. Considering this, a voltage of + V ₀ is applied to both ends of the buzzer 54 when the signal is 5V, and a voltage of −V ₀ is applied when the signal is 0V. Therefore, a voltage of 2V ₀ is relatively applied. FIG. 7 shows this timing chart.

On the other hand, when reducing the volume, the CPU
1 is set to 5 V (HIGH) and the amplifier 52
And the input voltage of the plus terminal of the amplifier 53 is set to 0V. Then, the operating frequency signal from the CPU 1 is input to the plus terminal of the amplifier 52 and the minus terminal of the amplifier 53.

When this signal is 5 V, the output of the amplifier 52 is V ₀ and the output of the amplifier 53 is ₀ V. When the signal is ₀ V, the outputs of the amplifiers 52 and 53 are both 0 V. Therefore, the B terminal of the buzzer 54 is considered. Then, a voltage of + V ₀ is applied to both ends of the buzzer 54 when the signal is 5V, and a voltage of 0V is applied when the signal is 0V. Therefore, the buzzer 54 has V
A voltage of ₀ will be applied.

Normally, a control signal of 5 V is input to the transistor 51, and a control signal of 0 V is input only when a ringing tone sounds.

FIG. 8 is a flowchart showing an operation when a ringing tone is sounded.

At the time of automatic switching between the facsimile apparatus and the telephone (S11), a control signal of 0 V is inputted from the CPU 1 to the base of the transistor 51 (S12), and an operating frequency signal is inputted from the CPU 1 to the amplifiers 52 and 53 (S1).
3). As a result, a voltage of 2V ₀ is applied to both ends of the buzzer 54, and the buzzer starts sounding.

Next, a fourth embodiment of the present invention will be described from the background.

This embodiment relates to a device that outputs a plurality of sounds such as a key touch sound, an alarm sound, and voice guidance from one speaker when the device is operated or operated.

As described in the above prior art, in a device that outputs a key touch sound, an alarm sound, or the like at the time of operation or operation, the volume of those sounds is adjusted by a speaker amplifier or a preamplifier in a stage preceding the speaker amplifier. By adjusting the degree of amplification by the volume, a desired sound volume is obtained.

However, since the volume control is uniformly applied to all the sounds, there is a disadvantage that if the volume is reduced, a warning sound such as an alarm sound cannot be heard. In addition, even when there are a plurality of sound sources, similarly, there is a disadvantage that the volume control is uniformly applied to all the sound sources.

Therefore, in the following embodiments, by combining an analog multiplexer, a volume, and a fixed resistor, a sound whose volume can be varied by the volume without increasing the amplifier and a sound that outputs a constant volume regardless of the volume. Can be selectively switched.

For example, the key touch sound can be adjusted by the volume, and the alarm sound can be output at a fixed volume regardless of the volume.

Further, for a sound to be output at a fixed volume, the output level can be selected in multiple stages.

FIG. 10 is a circuit diagram showing a fourth embodiment of the present invention.

In this embodiment, a sound source 101 for outputting sound from a speaker 107, an input resistor 102 for determining the amplification of the amplifier 106, and a variable resistor (volume) 103 for varying the amplification of the amplifier 106 are provided. A fixed resistor 104 for determining the amplification of the amplifier 106;
Control for controlling the analog multiplexer 105 via a control line 109, an amplifier 106, a speaker 107, and a control line 109 for switching the feedback resistor for determining the amplification degree of the variable resistor 6 to either the variable resistor 103 or the fixed resistor 104. And a unit 108. Further, the amplification system uses an inverting amplifier of an operational amplifier as a model to simplify the description.

In FIG. 10, as shown in Table 1 of FIG. 12, when outputting a sound whose volume is to be changed according to the user's preference, for example, a key touch sound, the control unit 108
Sets the control line 109 to the “L” level, sets the feedback resistor to the variable resistor side, and allows the user to vary the variable resistor 103 so that a desired volume can be obtained. In the case of a sound, such as an alarm sound, which is always desired to be output at a constant volume, the control line 109 is set to “H” level, the feedback resistor is set to the fixed resistor side, and a constant volume is output regardless of the volume. To do.

In this way, the volume can be made effective depending on the type and meaning of the output sound.
It is possible to switch between outputting at a constant volume.

FIG. 11 is a circuit diagram showing a fifth embodiment of the present invention. This circuit can vary the volume of a sound output at a fixed level in four steps, and can select a sound source when there are a plurality of sound sources.

The apparatus of this embodiment has a first sound source 201 for outputting a sound from the speaker 207, second, third and fourth sound sources 220 to 222, and a variable amplification degree of the amplifier 206. A variable resistor (volume) 203 of
A fixed resistor 204 for determining the amplification of the amplifier 206; a 4053 type analog multiplexer 205 for switching the feedback resistor for determining the amplification of the amplifier 206 to either the variable resistor 203 or the fixed resistor 204;
, A speaker 207, and control lines 209, 210, 211
20 for controlling an analog multiplexer via the
6, a 4051-type analog multiplexer 212 for switching the output level of sound output at a fixed level and selecting a sound source, and input resistors 213 to 219 for determining the amplification of sound from each sound source. Have.
The amplification system uses an inverting amplifier of an operational amplifier as a model in order to simplify the description.

Here, in order to change the output level of the sound output at a fixed level, the input resistors 215, 214, 213
Have the relationship of R5>R6> R7. Therefore, when the input resistance is set to R7, a loud sound is output, and when the input resistance is set to R5, a loud sound is output. If the X4 terminal of the analog multiplexer 212 is selected, the output sound can be silenced.

Further, the control line 209 also serves as the control line of the analog multiplexer 205. When the terminals X4 to X7 of the analog multiplexer 212 are selected, the analog multiplexer 205 is on the fixed resistor 204 side, that is, on the fixed level side. In the case of other terminals, the output is on the variable resistor side, and the output level can be changed by the variable resistor 203.

As described above, the control unit 208 controls the control lines 209, 210, and 211 according to the sound to be output as shown in Table 2 of FIG. be able to.

The fifth embodiment described above is merely an example, and various variations can be considered depending on the number of sound sources and the number of variable fixed levels, and if necessary, a logic circuit may be added to the control line. , You can further expand the variation. Further, if the output port of the control unit has a margin, the analog multiplexer for selecting the input resistance and the analog multiplexer for selecting the feedback resistance may be independently controlled.

[0070]

[0071]

According to the present invention, by combining a fixed resistor and an analog multiplexer and volume, without increasing the number of amplifiers, and outputs the variable can sound volume by volume, a fixed volume regardless of the volume The sound can be selectively switched, and there is an effect that a sound desired to be effective for the user such as an alarm sound can be output at a constant level even if the volume is reduced. Further, there is an effect that only a certain sound can be output louder or lower as required.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a buzzer sound output unit of the first embodiment.

FIG. 3 is a circuit diagram illustrating a configuration of a buzzer sound output unit according to a second embodiment of the present invention.

FIG. 4 is an analog switch IC according to the second embodiment.
FIG. 4 is an explanatory diagram showing a correspondence table between inputs and outputs of FIG.

FIG. 5 is a flowchart showing the operation of the second embodiment.

FIG. 6 is a circuit diagram illustrating a configuration of a buzzer sound output unit according to a third embodiment of the present invention.

FIG. 7 is a timing chart showing a control operation of a buzzer sound according to the third embodiment.

FIG. 8 is a flowchart showing the operation of the third embodiment.

FIG. 9 is a circuit diagram showing a configuration of a conventional buzzer sound output unit.

FIG. 10 is a circuit diagram showing a configuration of a fourth embodiment of the present invention.

FIG. 11 is a circuit diagram showing a configuration of a fifth embodiment of the present invention.

FIG. 12 is a table showing an operation for a control line according to the fourth embodiment.

FIG. 13 is a table showing an operation for a control line according to the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Non-volatile RAM, 5 ... CG, 6 ... Recording part, 7 ... Reading part, 8 ... Modem, 9 ... NCU, 10 ... Telephone line, 11 ... Telephone, 12 ... operation unit, 13 ... display unit, 14 ... buzzer sound output unit.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Takashi Ono 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-5-48804 (JP, A) JP-A-1 -129638 (JP, A) Japanese Utility Model 62-173868 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/00

Claims (3)

(57) [Claims] 1. A sound source for generating an audio signal at an audio frequency, an amplifier for amplifying a signal from the sound source, a resistor and a variable resistor serving as feedback resistors for determining the degree of amplification of the amplifier; Switching means for selectively switching according to the sound output from the variable resistor. 2. A sound source for generating an audio signal at an audio frequency, an amplifier for amplifying a signal from the sound source, and a plurality of input resistors having different resistance values for determining the amplification degree of the amplifier are connected in parallel to the sound source. Input resistance switching means for selecting and switching between these input resistances, a resistor and a variable resistor serving as feedback resistors for determining the amplification of the amplifier, and feedback resistance switching means for switching between these resistors and the variable resistor. And
A sound output device for selectively switching between the input resistance and switching between a fixed resistance and a variable resistance of the feedback resistance according to a sound to be output and a desired output level at that time. 3. A plurality of sound sources for generating an electric signal of a variable frequency, an amplifier for amplifying a signal from the sound source, and an input resistor for determining an amplification degree of the amplifier are independently connected for each sound source. Input resistance switching means for selecting and switching an input resistance, and feedback resistance switching means for switching between a resistor serving as a feedback resistor and a variable resistor for determining the amplification degree of the amplifier, and a sound source of a sound to be output; A sound output device characterized by selectively switching the input resistance and switching between the fixed resistance and the variable resistance of the feedback resistance according to a desired output method, that is, a fixed level or a variable level.