JPH04137903A - Audio signal amplifier circuit - Google Patents
Audio signal amplifier circuitInfo
- Publication number
- JPH04137903A JPH04137903A JP2260926A JP26092690A JPH04137903A JP H04137903 A JPH04137903 A JP H04137903A JP 2260926 A JP2260926 A JP 2260926A JP 26092690 A JP26092690 A JP 26092690A JP H04137903 A JPH04137903 A JP H04137903A
- Authority
- JP
- Japan
- Prior art keywords
- low
- circuit
- frequency
- headphone
- audio signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005236 sound signal Effects 0.000 title claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 230000003321 amplification Effects 0.000 claims description 15
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 15
- 230000002238 attenuated effect Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、低音域の強調回路を有する音声信号増幅回路
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an audio signal amplification circuit having a bass emphasis circuit.
従来の技術
従来、低音域の強調回路を有した音声信号増幅回路では
、その出力をそのままへッドフオンで聴くと低音がこも
って聞こえるため、へ・ソドフオンが接続されると低音
域の強調回路が働かないようにするスイッチ回路、また
は低音域の強調回路を経由しないヘッドフォン専用の小
出力電力増幅回路を備えているという構成か主流であっ
た。Conventional technology Conventionally, in audio signal amplification circuits that have a bass-range emphasis circuit, if you listen to the output directly with a headphone, the bass sounds muffled, so when a headphone is connected, the bass-range emphasis circuit does not work. The most common configuration was to include a switch circuit to prevent noise from occurring, or a low-output power amplification circuit dedicated to headphones that bypasses the bass emphasis circuit.
発明が解決しようとする課題
しかしながら、上記構成の音声信号増幅回路では、信号
経路を切り換えて低音域の強調回路を経由させないよう
にする回路や、ヘッ、ドフオン専用の電力増幅回路が必
要であり、その分だけ回路構成が複雑になり、高価にな
ってしまうという問題があった。Problems to be Solved by the Invention However, the audio signal amplification circuit configured as described above requires a circuit that switches the signal path so that the signal does not go through the bass emphasis circuit, and a power amplification circuit dedicated to do-on. There was a problem in that the circuit configuration became complicated and expensive accordingly.
本発明は上記課題を解決するもので、低音域の強調回路
と、低域遮断フィルターとを備えた音声信号増幅回路を
提供することを目的としている。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an audio signal amplification circuit including a low-frequency emphasis circuit and a low-frequency cutoff filter.
課題を解決するための手段
本発明は、上記問題点を解決するために、コンデンサと
抵抗器とから構成された低域遮断フィルターヲヘッドフ
ォン用の減衰器とヘソドフォン用の出力端子との間に挿
入することにより、低音域のカットオフ周波数を高くし
、低音域の増強回路により低音の増加分を等価的にキャ
ンセルさせることを実現するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a method for inserting a low-frequency cutoff filter composed of a capacitor and a resistor between an attenuator for headphones and an output terminal for a hesodophone. By doing so, it is possible to raise the cutoff frequency of the bass range and to equivalently cancel the increase in the bass range using the bass range enhancement circuit.
作用
本発明によれば、上記のように、コンデンサとへッドフ
ォンの抵抗分を含んだ抵抗とで構成される低域遮断フィ
ルターによって、低音域強調回路による低音の増加分を
キャンセルできるため、信号経路の切り換え回路やヘソ
ドフォン専用の電力増幅回路を用いる必要がなく、安価
にて同等の性能を得ることができる。According to the present invention, as described above, the low-frequency cutoff filter composed of the capacitor and the resistor including the resistance of the headphones can cancel out the increase in bass caused by the bass emphasis circuit, so that the signal path is reduced. There is no need to use a switching circuit or a dedicated power amplifier circuit for Hesodophone, and the same performance can be obtained at a lower cost.
実施例
以下、本発明の実施例を、図面を用いて詳細に説明する
。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明の一実施例である音声信号増幅回路の回
路図である。第１図において、１０は入力端子、１１は
音量調整用の減衰器、１２は低音域強調回路、１３は低
周波電力増幅回路、１４はへッドフォン１９を接続する
と低周波電力増幅回路１３の出力とスピーカ１５とが切
りはなされる連動スイッチ付きのへッドフォン用出力端
子、１６は低周波電力増幅回路１３の出力をヘッドフォ
ン１９の入力に合わすための減衰器、１７はコンデンサ
、１８は抵抗器であり、抵抗器１８とへッドフォン１９
の抵抗分との合成抵抗とコンデンサ１７とで低減遮断フ
ィルターを構成している。FIG. 1 is a circuit diagram of an audio signal amplification circuit which is an embodiment of the present invention. In FIG. 1, 10 is an input terminal, 11 is an attenuator for volume adjustment, 12 is a bass emphasis circuit, 13 is a low frequency power amplification circuit, and 14 is an output of the low frequency power amplification circuit 13 when headphones 19 are connected. 16 is an attenuator for matching the output of the low frequency power amplifier circuit 13 to the input of the headphones 19, 17 is a capacitor, and 18 is a resistor. , resistor 18 and headphones 19
The combined resistance and the capacitor 17 constitute a reduction cutoff filter.
以下、その動作について図面を参照して説明する。まず
、ヘッドフォン１９が接続されていない場合は、入力端
子１０から入力された音声信号が音ｍ調整用の減衰器１
１によって調整され強調回路１２にて、その低音域成分
だけを強調され低周波電力増幅回路１３で電力を増幅さ
れスピーカ１５を駆動する。次に、ヘッドフォン１９が
接続された場合は、低周波電力増幅回路１３で増幅され
た音声信号が、ヘッドフォン用出力端子１４の連動スイ
ッチによって、スピーカ１５から切りはなされ、減衰器
１６で減衰させコンデンサ１７と抵抗器１８とヘソドフ
ｔン１９とで構成される低域遮断フィルターに入力され
る。このとき、低域遮断フィルターの時定数を小さくし
ておき、低音域強調回路１２での低音域の時定数と合わ
せてやることによって、入力端子１０からみた周波数特
性を等価的にフラットにすることができる。The operation will be explained below with reference to the drawings. First, when the headphones 19 are not connected, the audio signal input from the input terminal 10 is transmitted to the attenuator 1 for adjusting the sound m.
1, the emphasis circuit 12 emphasizes only the low frequency component, and the power is amplified by the low frequency power amplification circuit 13 to drive the speaker 15. Next, when the headphones 19 are connected, the audio signal amplified by the low frequency power amplification circuit 13 is disconnected from the speaker 15 by the interlocking switch of the headphone output terminal 14, attenuated by the attenuator 16, and then capacitor 17, a resistor 18, and a low frequency filter 19. At this time, by keeping the time constant of the low-frequency cutoff filter small and combining it with the time constant of the low-frequency range of the bass-frequency emphasis circuit 12, the frequency characteristics seen from the input terminal 10 can be made equivalently flat. I can do it.
なお、減衰器１８がなくても、ヘッドフォン１９の抵抗
分だけで低域遮断フィルターを構成できるか、減衰器１
８がないとヘノドフォン１９を接続した瞬間に、ヘノド
フォン１９の抵抗を経由して、コンデンサ１７を充電あ
るいは放電するため、その際発生するノズルを防止する
ためのものである。また、この低域遮断フィルターは、
コンデンサと抵抗器、それぞれ１個ずつのみで構成でき
るため、安価に構成することができる。It should be noted that even without the attenuator 18, it is possible to configure a low-frequency cutoff filter using only the resistance of the headphones 19.
8, the moment the henodophone 19 is connected, the capacitor 17 will be charged or discharged via the resistance of the henodophone 19, so this is to prevent nozzles from occurring at that time. In addition, this low-cut filter
Since it can be constructed with only one capacitor and one resistor, it can be constructed at low cost.
また、本発明は本実施例に限定されるものではなく、本
発明の趣旨に基づいて種々の変形が可能であり、これら
を本発明の範囲から削除するものではない。Further, the present invention is not limited to the present embodiment, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
発明の効果
以」二、詳細に説明したように、本発明によれば、次の
ような効果を奏することができる。Effects of the Invention Second, as described in detail, according to the present invention, the following effects can be achieved.
（１） 低域遮断フィルターがコンデンサと抵抗器そ
れぞれ１個ずつで構成されるため回路の単純化が図れる
。(1) The circuit can be simplified because the low-pass cutoff filter consists of one capacitor and one resistor.
（２）構成要因である部品が少数であるため安価に構成
することができる。(2) Since the number of constituent parts is small, it can be constructed at low cost.
第１図は本発明の実施例を示す音声信号増幅回路の回路
図である。
１０・・・・・・入力端子、１１・・・・・・減衰器、
１２・・・中低音域強調回路、１３・・・・・・低周波
電力増幅回路、１４・・・・・・連動スイッチ付きへッ
ドフォン用出力端子、１５・・・・・・スピーカ、１６
・・・・・・減衰器、１７・・・・・・コンデンサ、１
８・・・・・・抵抗器、１９・・・・・・ヘッドフォン
。FIG. 1 is a circuit diagram of an audio signal amplification circuit showing an embodiment of the present invention. 10...Input terminal, 11...Attenuator,
12... Mid-bass emphasis circuit, 13... Low frequency power amplification circuit, 14... Headphone output terminal with interlocking switch, 15... Speaker, 16
...Attenuator, 17...Capacitor, 1
8...Resistor, 19...Headphones.
Claims (1)
幅回路と、 前記低周波電力増幅回路の出力に接続され、その出力電
力を減衰させる減衰器と、 前記減衰器の出力に接続され前記低周波強調回路によっ
て強調された分の低音を減衰させ周波数特性を補正する
ためにコンデンサと抵抗器とから構成された低域遮断フ
ィルターと、 前記低域遮断フィルターの出力に接続された出力端子と
、 を備えた音声信号増幅回路。[Scope of Claims] A circuit for emphasizing the low frequency range of an audio signal; a low frequency power amplification circuit that receives the output signal of the low frequency power amplification circuit; a low-frequency cutoff filter connected to the output of the attenuator and configured of a capacitor and a resistor for attenuating the bass emphasized by the low-frequency emphasizing circuit and correcting frequency characteristics. and an output terminal connected to the output of the low-pass cutoff filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260926A JP2830444B2 (en) | 1990-09-28 | 1990-09-28 | Audio signal amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260926A JP2830444B2 (en) | 1990-09-28 | 1990-09-28 | Audio signal amplification circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04137903A true JPH04137903A (en) | 1992-05-12 |
| JP2830444B2 JP2830444B2 (en) | 1998-12-02 |
Family
ID=17354686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2260926A Expired - Fee Related JP2830444B2 (en) | 1990-09-28 | 1990-09-28 | Audio signal amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2830444B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008103879A (en) * | 2006-10-18 | 2008-05-01 | Sony Corp | Audio reproducer |
| JP2008306420A (en) * | 2007-06-07 | 2008-12-18 | Onkyo Corp | Amplifier circuit |
-
1990
- 1990-09-28 JP JP2260926A patent/JP2830444B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008103879A (en) * | 2006-10-18 | 2008-05-01 | Sony Corp | Audio reproducer |
| JP4666229B2 (en) * | 2006-10-18 | 2011-04-06 | ソニー株式会社 | Audio playback device |
| US8077882B2 (en) | 2006-10-18 | 2011-12-13 | Sony Corporation | Audio reproducing apparatus |
| US8737642B2 (en) | 2006-10-18 | 2014-05-27 | Sony Corporation | Audio reproducing apparatus |
| JP2008306420A (en) * | 2007-06-07 | 2008-12-18 | Onkyo Corp | Amplifier circuit |
| JP4613932B2 (en) * | 2007-06-07 | 2011-01-19 | オンキヨー株式会社 | Amplifier circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2830444B2 (en) | 1998-12-02 |
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