JP2545776Y2 - Low temperature boost circuit - Google Patents
Low temperature boost circuitInfo
- Publication number
- JP2545776Y2 JP2545776Y2 JP1990097822U JP9782290U JP2545776Y2 JP 2545776 Y2 JP2545776 Y2 JP 2545776Y2 JP 1990097822 U JP1990097822 U JP 1990097822U JP 9782290 U JP9782290 U JP 9782290U JP 2545776 Y2 JP2545776 Y2 JP 2545776Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pass filter
- boost circuit
- resonance frequency
- bass boost
- 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.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
【考案の詳細な説明】 （イ）産業上の利用分野 本考案は音響機器における低音ブースト回路に関す
る。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a bass boost circuit in audio equipment.
（ロ）従来の技術 近年、ミニコンポなどの音響機器はますます小型化さ
れていく傾向がある。従って、以前は大型だったスピー
カ装置もかなり小型化されてきている。このような機器
においては再生音の低音成分が不足する傾向がある。こ
れは一般に低音の再生能力はスピーカ装置のスピーカユ
ニット及びエンクロージャの大きさによってある程度決
まってしまうが、前述したようにスピーカが小型化され
たために生じる問題である。(B) Conventional technology In recent years, audio devices such as mini components have tended to be further miniaturized. Accordingly, the previously large speaker device has been considerably reduced in size. In such a device, the bass component of the reproduced sound tends to be insufficient. Generally, the bass reproduction capability is determined to some extent by the size of the speaker unit and the enclosure of the speaker device, but this is a problem caused by the miniaturization of the speaker as described above.
このため、第１図に示されるようなオペアンプ
（１）、コンデンサ（C1）（C2）、抵抗（R1）（R2）で
構成されるハイパスフィルタの共振を利用した低音ブー
スト回路を音声信号ライン中に設け、これによってスピ
ーカ装置の低音が不足する付近の帯域の信号レベルを増
強することで上記問題を解決しているものである。Therefore, a bass boost circuit using resonance of a high-pass filter composed of an operational amplifier (1), capacitors (C1) (C2), and resistors (R1) (R2) as shown in FIG. The above problem is solved by enhancing the signal level in a band near the low sound of the speaker device.
尚、図中（２）はパワーアンプ、（３）はスピーカ装
置を示している。また第３図ａは同回路による再生周波
数特性を示す。In the drawing, (2) indicates a power amplifier, and (3) indicates a speaker device. FIG. 3A shows the reproduction frequency characteristics of the same circuit.
（ハ）考案が解決しようとする課題 然し乍ら、上記した従来の低音ブースト回路は回路構
成が簡単であるという長所を有する反面、共振周波数
（fc）及びＱ値がコンデンサ及び抵抗によって決められ
てしまうため、決められた周波数の音は増強されるもの
の、それ以外の周波数の音には効果が得られない（増幅
されない）といった問題がある。(C) Problems to be Solved by the Invention However, the above-described conventional bass boost circuit has an advantage that the circuit configuration is simple, but the resonance frequency (fc) and the Q value are determined by the capacitor and the resistor. However, there is a problem that the sound of the determined frequency is enhanced, but the sound of other frequencies is not effective (is not amplified).
（ニ）課題を解決するための手段 上記課題を解決するために本考案では、コンデンサ及
び抵抗とで構成されるハイパスフィルタと、該ハイパス
フィルタを介した信号を正入力へ導くと共に出力信号を
負入力へと帰還するオペアンプとで構成される低音ブー
スト回路の出力を、共振周波数が前記ハイパスフィルタ
の共振周波数の２倍に設定されたイコライザ回路に導く
ように構成し、前記ハイパスフィルタの共振周波数の信
号及び該信号の２倍の周波数帯域の信号とを増幅するよ
うにした低音ブースト回路を提供せんとするものであ
る。(D) Means for Solving the Problems In order to solve the above problems, according to the present invention, a high-pass filter including a capacitor and a resistor, a signal passed through the high-pass filter to a positive input, and an output signal being negative. The output of the bass boost circuit composed of an operational amplifier that feeds back to the input is configured to be guided to an equalizer circuit whose resonance frequency is set to twice the resonance frequency of the high-pass filter. It is an object of the present invention to provide a bass boost circuit for amplifying a signal and a signal in a frequency band twice as high as the signal.
（ホ）作用 上記の如く構成したので、ハイパスフィルタの共振周
波数の帯域の信号が増幅されると共にイコライザ回路に
よって低音ブースト回路におけるハイパスフィルタの共
振周波数の２倍の周波数帯域の信号が増幅される。(E) Operation With the configuration described above, the signal in the resonance frequency band of the high-pass filter is amplified, and the signal in the frequency band twice the resonance frequency of the high-pass filter in the bass boost circuit is amplified by the equalizer circuit.
（ヘ）実施例 以下、図面を参照しつつ、本考案の一実施例について
説明する。(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.
第２図は本考案の低音ブースト回路を示している。同
図において、オペアンプ（１）、コンデンサ（C1）（C
2）、抵抗（R1）（R2）にてハイパスフィルタを構成
し、フィルタの共振周波数（fc）、Ｑ値、減衰特性（12
dB/octまたは8dB/oct）はこれらの定数によって決定さ
れる。FIG. 2 shows the bass boost circuit of the present invention. In the figure, operational amplifier (1), capacitor (C1) (C
2) A high-pass filter is composed of the resistors (R1) and (R2). The filter's resonance frequency (fc), Q value, and attenuation characteristics (12
dB / oct or 8 dB / oct) is determined by these constants.
そしてオペアンプ（１）の出力信号がイコライザ回路
（４）に導かれるように構成されており、前記イコライ
ザ回路（４）の中心周波数は前記ハイパスフィルタの共
振周波数（fc）の２倍に設定されている。従って、第３
図ｂに示す如くハイパスフィルタの共振周波数（fc）の
帯域の信号が増幅されるだけでなく、共振周波数（fc）
の２倍の帯域の信号を増幅することができるので厚みの
ある低音再生が可能である。The output signal of the operational amplifier (1) is configured to be guided to an equalizer circuit (4), and the center frequency of the equalizer circuit (4) is set to twice the resonance frequency (fc) of the high-pass filter. I have. Therefore, the third
As shown in FIG. B, not only the signal in the band of the resonance frequency (fc) of the high-pass filter is amplified, but also the resonance frequency (fc).
Since a signal in a band twice as large as that of the above can be amplified, a thick bass sound can be reproduced.
（ト）考案の効果 上記の如く本考案に依れば、コンデンサ及び抵抗とで
構成されるハイパスフィルタと、該ハイパスフィルタを
介した信号を正入力へ導くと共に出力信号を負入力へと
帰還するオペアンプとで構成される低音ブースト回路の
出力を、共振周波数が前記ハイパスフィルタの共振周波
数の２倍に設定されたイコライザ回路に導くように構成
し、前記ハイパスフィルタの共振周波数の信号及び該信
号の２倍の周波数帯域の信号とを増幅するようにしたの
で、イコライザ回路によって低音ブースト回路のハイパ
スフィルタの共振周波数の信号（基本波）と該信号の２
倍の周波数の信号（高調波成分）とが増幅されるので、
豊かな低音再生を実現させることができる。(G) Effects of the present invention As described above, according to the present invention, a high-pass filter constituted by a capacitor and a resistor, and a signal passed through the high-pass filter is guided to a positive input and an output signal is fed back to a negative input. An output of a bass boost circuit composed of an operational amplifier is configured to be guided to an equalizer circuit whose resonance frequency is set to twice the resonance frequency of the high-pass filter, and a signal of the resonance frequency of the high-pass filter and a signal of the signal are output. Since the signal of the double frequency band is amplified, the signal (fundamental wave) of the resonance frequency of the high-pass filter of the bass boost circuit and the signal of the signal (basic wave) are amplified by the equalizer circuit.
Since the signal (harmonic component) of the double frequency is amplified,
Rich bass reproduction can be realized.
第１図は従来の低音ブースト回路の構成を示す回路図、
第２図は本考案の低音ブースト回路の構成を示す回路
図、第３図は低音ブースト回路の周波数特性を示す図。 （１）…オペアンプ、（C1）（C2）…コンデンサ、（R
1）（R2）…抵抗、（４）…イコライザ回路。FIG. 1 is a circuit diagram showing a configuration of a conventional bass boost circuit.
FIG. 2 is a circuit diagram showing the configuration of the bass boost circuit of the present invention, and FIG. 3 is a diagram showing the frequency characteristics of the bass boost circuit. (1) ... operational amplifier, (C1) (C2) ... capacitor, (R
1) (R2): resistor, (4): equalizer circuit.
Claims (1)
スフィルタと、該ハイパスフィルタを介した信号を正入
力へ導くと共に出力信号を負入力へと帰還するオペアン
プとで構成される低音ブースト回路の出力を、共振周波
数が前記ハイパスフィルタの共振周波数の２倍に設定さ
れたイコライザ回路に導くように構成し、前記ハイパス
フィルタの共振周波数の信号及び該信号の２倍の周波数
帯域の信号とを増幅するようにしたことを特徴とする低
音ブースト回路。1. An output of a bass boost circuit comprising a high-pass filter composed of a capacitor and a resistor, and an operational amplifier for guiding a signal passed through the high-pass filter to a positive input and returning an output signal to a negative input. To an equalizer circuit whose resonance frequency is set to twice the resonance frequency of the high-pass filter, and amplifies a signal of the resonance frequency of the high-pass filter and a signal of a frequency band twice as high as the signal. A bass boost circuit characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990097822U JP2545776Y2 (en) | 1990-09-17 | 1990-09-17 | Low temperature boost circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990097822U JP2545776Y2 (en) | 1990-09-17 | 1990-09-17 | Low temperature boost circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455823U JPH0455823U (en) | 1992-05-13 |
| JP2545776Y2 true JP2545776Y2 (en) | 1997-08-27 |
Family
ID=31838531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990097822U Expired - Fee Related JP2545776Y2 (en) | 1990-09-17 | 1990-09-17 | Low temperature boost circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545776Y2 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55125710A (en) * | 1979-03-20 | 1980-09-27 | Trio Kenwood Corp | Tone control circuit |
| JPS55143811A (en) * | 1979-04-26 | 1980-11-10 | Trio Kenwood Corp | Tone control circuit |
| JPH0139034Y2 (en) * | 1980-05-12 | 1989-11-21 | ||
| JPS5899916U (en) * | 1981-12-24 | 1983-07-07 | パイオニア株式会社 | portable audio equipment |
| JPS599620U (en) * | 1982-07-08 | 1984-01-21 | 三洋電機株式会社 | Graphic equalizer circuit |
| JPS5998253A (en) * | 1982-11-27 | 1984-06-06 | Toshiba Corp | Microprogram controller |
| JPS6072407A (en) * | 1983-09-29 | 1985-04-24 | Oki Electric Ind Co Ltd | Ac amplifier circuit |
| JPS61321U (en) * | 1984-06-06 | 1986-01-06 | クラリオン株式会社 | Bass-treble control device |
-
1990
- 1990-09-17 JP JP1990097822U patent/JP2545776Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0455823U (en) | 1992-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |