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Loudspeaker driving circuit

A technology for driving circuits and loudspeakers, applied in transducer circuits, sensors, electrical components, etc., can solve problems such as inability to drive air enough, adverse effects on sound quality, etc.

Inactive Publication Date: 2005-07-20
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the speaker is relatively small, for example, when it is a speaker installed in a television, when the audio signal level is raised and the speaker 8 is driven by an ultra-low audio signal having a high level, the diaphragm itself of the speaker 9 Vibrates, but not enough to drive air
Therefore, the sound quality is adversely affected

Method used

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  • Loudspeaker driving circuit
  • Loudspeaker driving circuit
  • Loudspeaker driving circuit

Examples

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Embodiment Construction

[0017] An embodiment of the speaker driving circuit of the present invention is illustrated with reference to FIGS. 1 and 2 . In FIG. 1, components corresponding to those in FIG. 5 are denoted by the same reference numerals.

[0018] In Fig. 1, reference numeral 1 denotes an audio signal input terminal for receiving an audio signal, and this audio signal input terminal 1 is connected with one end of a coupling capacitor 2, and the other end of the coupling capacitor 2 is connected by a capacitor 3, 4 The series circuit formed with resistor 5 is grounded, the connecting midpoint of coupling capacitor 2 and capacitor 3 is grounded through variable resistor 6, and the grounded midpoint of capacitors 3 and 4 is connected with the midpoint of variable resistor 6 resistance element 6a. Capacitors 3, 4, resistor 5 and variable resistor 6 constitute a volume control circuit.

[0019] In this example, the movable part 6b of the variable resistor 6 is connected via the coupling capacit...

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PUM

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Abstract

To avoid adverse effect on sound quality when level of audio signal is raised, in a speaker driving circuit comprising ultralow range emphasizing means for emphasizing an ultralow range and a high-pass filter, switching means for removing the high-pass filter from an audio signal path when an audio signal to be supplied to a speaker is below a medium level, and inserting the high-pass filter in the audio signal path when an audio signal to be supplied to the speaker is above the medium level is provided.

Description

technical field [0001] The present invention relates to a speaker drive circuit suitable for driving relatively small speakers such as those incorporated in television sets. Background technique [0002] In television sets, for example, relatively small speakers are used, which usually do not reproduce the subwoofer range well because of the limited space. In addition, the human hearing characteristic curve varies according to the sound level and has the following tendency. As the sound level decreases, so does the sensitivity to the subwoofer range. Thus, when the sound level is low, there is a problem that it is difficult to hear the subwoofer. [0003] In order to solve the above-mentioned problem that it is difficult to hear the subwoofer when the sound level is low, a method using a so-called volume control circuit that changes the frequency characteristic curve of the speaker drive circuit corresponding to the sound level monitoring level has hitherto been known. . ...

Claims

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Application Information

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IPC IPC(8): H04R3/04H03G9/00H04R3/00
CPCH04R3/00
Inventor 前岛吉道
Owner SONY CORP