JPS62130007A - Low frequency signal amplifier circuit - Google Patents
Low frequency signal amplifier circuitInfo
- Publication number
- JPS62130007A JPS62130007A JP60270955A JP27095585A JPS62130007A JP S62130007 A JPS62130007 A JP S62130007A JP 60270955 A JP60270955 A JP 60270955A JP 27095585 A JP27095585 A JP 27095585A JP S62130007 A JPS62130007 A JP S62130007A
- Authority
- JP
- Japan
- Prior art keywords
- low frequency
- power amplifiers
- frequency signal
- low
- coupling capacitors
- 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.)
- Pending
Links
Landscapes
- Amplifiers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はラジオ受信機付カセットテープレコーダ、テレ
ビジョン受像機やステレオ再生装置における低周波信号
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 a low frequency signal amplification circuit in a cassette tape recorder with a radio receiver, a television receiver, or a stereo playback device.
従来の技術
一般に、ステレオ方式の音声再生方法は、左右の各々の
信号を電力増幅回路で増幅し、左右のスピーカに接続さ
れるが、スピーカ及びスピーカの箱容積が小型になると
、低い周波数帯域の再生能力φ;荒仁てどスー こh仝
才市浄らムー イ庄い周11υ膣帯域の専用再生回路、
スピーカを用いる「3デイメンシヨン」(以下3Dと略
す)方式が知られている。第2図に従来の3D方式信号
再生器を示す。Conventional technology In general, in stereo audio reproduction methods, left and right signals are amplified using a power amplifier circuit and connected to left and right speakers. Reproduction ability φ; Dedicated regeneration circuit for the 11υ vagina band,
A "3-dimensional" (hereinafter abbreviated as 3D) method using speakers is known. FIG. 2 shows a conventional 3D signal regenerator.
第2図において、左右者々の電力増幅路2,3に左右の
スピーカ6.6を接続し、更に左右の信号を抵抗R11
r R12Kより合成してローパスフィルタ1を通し電
力増幅器7によ重低音用スピーカ4を駆動させる様に構
成されている。なお第2図中C11゜C12,C13,
C14,C16,C16は結合用コンデンサである。In Fig. 2, the left and right speakers 6.6 are connected to the power amplification paths 2 and 3 of the left and right people, and the left and right signals are further connected to the resistor R11.
r R12K, the signal is synthesized through a low-pass filter 1, and a power amplifier 7 drives a deep bass speaker 4. In addition, in Fig. 2, C11°C12, C13,
C14, C16, and C16 are coupling capacitors.
発明が解決しようとする問題点
ところが、この様な回路構成においては、低音再生の為
に専用の電力増幅器が必要となり、この為に使用部品が
増え、又配置する場所が余分に必要になり、価格が上が
ると云う問題があった。Problems to be Solved by the Invention However, in this kind of circuit configuration, a dedicated power amplifier is required for bass reproduction, which increases the number of components used and requires additional space for placement. There was a problem with rising prices.
問題点を解決するだめの手段
本発明の低周波信号増幅回路は、左右の各々の電力増幅
回路の出力に左右のスピーカを接続すると共に低周波数
帯域においては左右の各々の電力増幅器が重低音用スピ
ーカに対しBTL接続される様に構成したものである。Means to Solve the Problem The low frequency signal amplification circuit of the present invention connects the left and right speakers to the outputs of the left and right power amplification circuits, and in the low frequency band, the left and right power amplifiers are used for heavy bass. It is configured to be connected to the speaker via BTL.
作 用
本発明の低周波信号増幅回路は、左右の各々のステレオ
信号増幅機能の他に重低音の再生の為に低い周波数帯域
についてのみ左右の電力増幅器が重低音用スピーカに対
してBTL接続されることにより、従来ステレオ信号の
再生に必要である左右の電力増幅器のみで重低音を再生
する専用スピーカを駆動する事ができ、低価格で再生音
質の向上、特に低域周波数の再生能力の向上を図る事が
できる。Function: In addition to the left and right stereo signal amplification functions, the low frequency signal amplification circuit of the present invention has a BTL connection between the left and right power amplifiers to the deep bass speaker only for low frequency bands in order to reproduce deep bass. By doing so, it is possible to drive a dedicated speaker that reproduces deep bass using only the left and right power amplifiers that are conventionally required for stereo signal reproduction, improving the reproduction sound quality at a low cost, and especially improving the reproduction ability of low frequencies. It is possible to aim for
実施例
以下、本発明の笑施例の低周波信号増幅回路を図面を参
照して説明する。第1図に本発明の一実施例を示す。第
1図において、2,3は左右の電力増幅器、5.6は左
右のスピーカである。通常左右の信号は結合コンデンサ
C1,C2を通じ電力増幅器2,3で増幅され、結合コ
ンデンサC6,C7を通じスピーカ5,6より再生され
る。更に抵抗R1゜R2により混合された左右の信号は
ローパスフィルタ1を通し、低い周波数帯域のみ結合コ
ンデンサC2を通じトランジスタQ1のペースに入る。Embodiments Hereinafter, low frequency signal amplification circuits according to embodiments of the present invention will be explained with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 2 and 3 are left and right power amplifiers, and 5.6 is left and right speakers. Normally, the left and right signals are amplified by power amplifiers 2 and 3 through coupling capacitors C1 and C2, and reproduced by speakers 5 and 6 through coupling capacitors C6 and C7. Furthermore, the left and right signals mixed by resistors R1 and R2 pass through a low-pass filter 1, and only the low frequency band enters the transistor Q1 through a coupling capacitor C2.
ここで抵抗R4,Rρ定数を等しく設定すればトランジ
スタQ1のコレクタ出力とエミッタ出力は位相が反転さ
れた信号が出てくる。この信号を結合コンデンサC4,
C6を通し左右の電力増幅器2,3に加えると、電力増
幅器2,3の出力も位相が反転している為、この出力端
同志の出力電圧をみれば通常信号の2倍の電圧が表われ
、従って低音用スピーカ4を通常の2倍の電圧で駆動す
る事ができる。Here, if the resistor R4 and the Rρ constant are set equal, the collector output and emitter output of the transistor Q1 will output signals whose phases are inverted. This signal is coupled to the capacitor C4,
When applied to the left and right power amplifiers 2 and 3 through C6, the outputs of the power amplifiers 2 and 3 are also inverted in phase, so if you look at the output voltages of these output terminals, a voltage twice the normal signal will appear. Therefore, the bass speaker 4 can be driven with twice the normal voltage.
発明の効果
以上のように本発明の低周波信号増幅回路は、左右の電
力増幅器に重低音用再生の為に低い周波数帯域のみBT
L接続できる様に構成されたものであり、従って従来の
回路に位相反転回路を付加するだけで、価格増を最少限
にしながら音質の向上、重低音再生ができ、実用上きわ
めて有利なものである。Effects of the Invention As described above, the low frequency signal amplification circuit of the present invention uses BT only in the low frequency band for reproduction of heavy bass in the left and right power amplifiers.
It is configured so that it can be connected as an L, and therefore, by simply adding a phase inversion circuit to the conventional circuit, it is possible to improve sound quality and reproduce deep bass while minimizing the increase in price, making it extremely advantageous in practical terms. be.
第1図は本発明の一実施例における低周波信号増幅回路
の回路図、第2図は従来の低周波信号増幅回路の回路図
である。
1・・・・・ローパスフィルタ、2,3・・・・・・電
力増幅器、4・・・・・・重低音用スピーカ、5,6・
・・・・・スピーカ、Ql・・・・・位相反転用トラン
ジスタ。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名1−
−−a−バ入フイ・レフ 4−m−吏イ氏各
用入σ−/l−Q 1 図 2.3−−−
tn4’44r 6.6−−− 7.c’−1Q
−−−t−フンン人り
第2図FIG. 1 is a circuit diagram of a low frequency signal amplification circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional low frequency signal amplification circuit. 1...Low pass filter, 2,3...Power amplifier, 4...Deep bass speaker, 5,6...
...Speaker, Ql...Phase inversion transistor. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
--a-Ba-in-Fui-Ref 4-m-English person's entry σ-/l-Q 1 Figure 2.3---
tn4'44r 6.6--- 7. c'-1Q
---t-Hunn people Figure 2
Claims (1)
共に重低域周波数再生の為に周波数の低い帯域について
のみ左右の電力増幅器が重低音用スピーカに対してBT
L接続される様に構成したことを特徴とする低周波信号
増幅回路。The left and right speakers are connected to the outputs of the left and right power amplifiers, and in order to reproduce deep bass frequencies, the left and right power amplifiers connect BT to the deep bass speakers only for low frequency bands.
A low frequency signal amplification circuit characterized in that it is configured to be L-connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60270955A JPS62130007A (en) | 1985-12-02 | 1985-12-02 | Low frequency signal amplifier circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60270955A JPS62130007A (en) | 1985-12-02 | 1985-12-02 | Low frequency signal amplifier circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62130007A true JPS62130007A (en) | 1987-06-12 |
Family
ID=17493346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60270955A Pending JPS62130007A (en) | 1985-12-02 | 1985-12-02 | Low frequency signal amplifier circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62130007A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04111510A (en) * | 1990-08-30 | 1992-04-13 | Sanyo Electric Co Ltd | Amplifying circuit |
US5191616A (en) * | 1989-12-29 | 1993-03-02 | Yamaha Corporation | Acoustic apparatus |
JP2012100158A (en) * | 2010-11-04 | 2012-05-24 | Alpine Electronics Inc | Audio output device |
-
1985
- 1985-12-02 JP JP60270955A patent/JPS62130007A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5191616A (en) * | 1989-12-29 | 1993-03-02 | Yamaha Corporation | Acoustic apparatus |
JPH04111510A (en) * | 1990-08-30 | 1992-04-13 | Sanyo Electric Co Ltd | Amplifying circuit |
JP2012100158A (en) * | 2010-11-04 | 2012-05-24 | Alpine Electronics Inc | Audio output device |
EP2451190A3 (en) * | 2010-11-04 | 2015-04-08 | Alpine Electronics, Inc. | Sound output apparatus |
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