JPH0514094A - Reproduction device - Google Patents

Abstract

PURPOSE:To allow the user to increase the satisfaction to the sound quality by operating an electronic volume interposed between a loudness amplifier and a loudness variable resistor through a microcomputer. CONSTITUTION:An electronic volume 12 is interposed between a loudness amplifier 11 and a loudness variable resistor 13 and the electronic volume 12 is operated through a microcomputer 15 outputted from an input terminal of a switch 16. Thus, a desired boost quantity is set by the switch 16 and a variable resistance of the electronic volume 12 is changed through the microcomputer receiving the information. Thus, the user selects freely and sets the boost quantity of the loudness variable resistor having been set and fixed to a conventional sound volume depending on the music source and the preference of the user itself. Thus, even when the sound volume is reduced for listening to the source, the degree of satisfaction of the user to the sound quality is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing device, and more particularly to a reproducing device having a loudness control including a loudness amplifier, a loudness volume connected to the loudness amplifier and a resonance circuit.

[0002]

2. Description of the Related Art Generally,
When listening to music on a playback device such as an audio device, turn down the volume knob to reduce the sound
The human ear generally makes the bass and treble more difficult to hear. Therefore, when listening with a low volume and a low volume, such as in the middle of the night, it is possible to make the frequency characteristics perceptual close to flat by boost-correcting the low range and the high range in response to the decrease in volume. As is possible, conventional normal playback devices have built-in loudness control. However, the loudness volume in this loudness control is linked to the normal volume, and the boost amount of the loudness volume is fixed to the value set by the manufacturer corresponding to the volume value. For this reason, it is not possible to perform boost correction according to changes in the volume according to the preference based on the hearing characteristics of each user having individual differences, and it cannot be said that the best sound was provided to all users. There was a problem called.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a reproducing apparatus capable of adjusting the value of the loudness volume to the user's preference and music source.

[0004]

In order to achieve the above object, a reproducing apparatus according to the present invention is a reproducing apparatus having a loudness control including a loudness amplifier, a loudness volume connected to the loudness amplifier, and a resonance circuit. An electronic volume is interposed between the loudness amplifier and the loudness volume, and the electronic volume is configured to be operated via a microcomputer that outputs by an input from a switch.

[0005]

According to the above structure, in the reproducing apparatus having the loudness control including the loudness amplifier, the loudness volume connected to the loudness amplifier, and the resonance circuit, the electronic volume is provided between the loudness amplifier and the loudness volume. Since it is configured to be operated via a microcomputer that is provided with an electronic volume, which is output by input from a switch, the boost of the loudness volume that has been set and fixed corresponding to a conventional normal volume is provided. The amount can be freely selected and set according to the music source or user's preference by inputting with the switch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a reproducing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an outline of loudness control of the reproducing apparatus. The loudness control circuit is a loudness amplifier 11, an electronic volume 12, a loudness volume 13, a resonance circuit 14, a microcomputer 15, and a preset memory switch 1.
6 is included. + Of loudness amplifier 11
An input signal is input from the outside to the input side of the capacitor via the capacitor C1. Loudness amplifier 11
The loudness volume 13 and the resonance circuit 14 are connected to the input side of-of the electronic volume 12 through the electronic volume 12.
Further, the-input side of the loudness amplifier 11 has a resistor R1.
Alternatively, they are respectively connected to the output side of the loudness amplifier 11 via the capacitor C3, and the output side of the loudness amplifier 11 is further connected to other components (not shown) of the reproducing device. The resistor R1 is a resistor for determining the maximum boost amount, and the capacitor C3 is for preventing oscillation.

The electronic volume 12 is composed of a variable resistance VR1 and is connected in series with a loudness volume 13 composed of a variable resistance VR2. The loudness volume 13 is connected to a resonance circuit 14. The resonance circuit 14 includes capacitors C4 and C
5, the resistor R2 and the resistor R3, and the operational amplifier 17, the loudness volume 13 is connected to the + input side of the operational amplifier 17 via the capacitors C4 and C5, and the capacitor C5 and the + input of the operational amplifier 17 are connected. A connection line branches from between the side and the side, and this connection line is grounded via a resistor R3. The connection line branched from between the capacitors C4 and C5 is connected to the-input side of the operational amplifier 17 through the resistor R2, and the-input side of the operational amplifier 17 is connected to the operational amplifier 1
7 is connected to the output side. Also, electronic volume 1
2 is further connected to a preset memory switch 16 via a microcomputer 15.

In the reproducing apparatus having the above structure,
The variable resistor VR1 of the electronic volume 12 is controlled by the microcomputer 15, and the microcomputer 1
Reference numeral 5 stores a desired boost amount set in a plurality of stages based on a key input by a matrix corresponding to the preset memory switch 16. Then, the variable resistance VR1 of the electronic volume 12 moves according to the control signal from the microcomputer 15, and the boost amount is determined in two steps with the variable resistance VR2 of the loudness volume 13 by this. The frequency characteristic and the Q value are determined by the capacitors C4 and C5, the resistors R2 and R3, which form the resonance circuit 14, respectively.

As described above, in the reproducing apparatus according to the present embodiment, the electronic volume 12 is connected in series with the loudness volume 13, and the variable resistance VR1 of the electronic volume 12 is controlled by the microcomputer 15 to control the resistance. By changing the value, the user can freely select and set the boost amount of the loudness volume 13, which is conventionally set for the normal volume and is fixed, according to the music source and taste. Therefore,
Even when listening at a low volume with a low volume at midnight, the user's satisfaction with the sound quality can be increased, and the commercial value of the playback device can be increased.

As shown in FIG. 2 as another embodiment of the above resonance circuit 14, a coil L1 is used as a resonance circuit.
LC resonance circuit 2 in which a capacitor and a capacitor C6 are connected in series
4 can also be used.

[0011]

As described in detail above, the reproducing apparatus according to the present invention is a reproducing apparatus including a loudness amplifier, a loudness volume connected to the loudness amplifier, and a loudness control including a resonance circuit. An electronic volume is interposed between the loudness volume and the electronic volume, and the electronic volume is configured to be operated via a microcomputer that outputs by an input from a switch, so that a desired boost amount is set by the switch. The variable resistance of the electronic volume can be changed via the microcomputer to which the information is input. As a result, the user can freely select and set the boost amount of the loudness volume, which is conventionally set for the normal volume and is fixed, according to the music source and preference. Therefore, even when listening at a low volume and a low volume at midnight, the user's satisfaction with the sound quality can be increased, and the commercial value of the playback device can be increased.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an outline of loudness control in a reproducing apparatus according to the present invention.

FIG. 2 is a circuit diagram showing another embodiment of loudness control in the reproducing apparatus according to the present invention.

[Explanation of symbols]

 11 loudness amplifier 12 electronic volume 13 loudness volume 14, 24 resonance circuit 15 microcomputer 16 switch

Claims (1)

Claim: What is claimed is: 1. A reproducing device having a loudness control comprising a loudness amplifier, a loudness volume connected to the loudness amplifier, a resonance circuit, and the like, wherein an electronic signal is provided between the loudness amplifier and the loudness volume. A reproducing apparatus characterized in that a volume is interposed, and the electronic volume is operated via a microcomputer which outputs by an input from a switch.