JPH02123120U - - Google Patents
Info
- Publication number
- JPH02123120U JPH02123120U JP3140389U JP3140389U JPH02123120U JP H02123120 U JPH02123120 U JP H02123120U JP 3140389 U JP3140389 U JP 3140389U JP 3140389 U JP3140389 U JP 3140389U JP H02123120 U JPH02123120 U JP H02123120U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- low frequency
- amplifier
- components
- 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
- 230000002265 prevention Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
第１図は、この考案の一実施例に係る低域クリ
ツブ防止回路の基本構成を示すブロツク図、第２
図は、第１図の回路の動作概念説明図、第３図は
、第１図の回路の第１の具体例を示す回路図、第
４図は、第１図の回路の第２の具体例を示す回路
図、第５図は、第３および第４図の回路の変形例
を示す回路図、第６図は、第３〜第５図の変形例
を説明するための周波数特性図、第７図は、従来
における増幅器の低域クリツプを説明するための
波形図、そして、第８図は、ＡＧＣ回路を用いた
従来のクリツプ防止回路の一例を示す回路図、そ
して、第９図は、第１図の回路の変形例を示す回
路図である。
１：パワーアンプ、２：低域クリツプ防止回路
、３：低域通過手段（ローパスフイルタ）、４：
高域通過手段（ハイパスフイルタ）、５：位相補
正回路、６：ソフトクリツプ回路、７：加算回路
。
FIG. 1 is a block diagram showing the basic configuration of a low-frequency crimp prevention circuit according to an embodiment of the invention, and FIG.
1 is a conceptual diagram of the operation of the circuit in FIG. 1, FIG. 3 is a circuit diagram showing a first specific example of the circuit in FIG. 1, and FIG. 4 is a second specific example of the circuit in FIG. A circuit diagram showing an example, FIG. 5 is a circuit diagram showing a modified example of the circuit in FIGS. 3 and 4, and FIG. 6 is a frequency characteristic diagram for explaining the modified example of FIGS. 3 to 5. FIG. 7 is a waveform diagram for explaining the low frequency clip of a conventional amplifier, FIG. 8 is a circuit diagram showing an example of a conventional clip prevention circuit using an AGC circuit, and FIG. , is a circuit diagram showing a modification of the circuit of FIG. 1; 1: Power amplifier, 2: Low-frequency clip prevention circuit, 3: Low-pass means (low-pass filter), 4:
High-pass means (high-pass filter), 5: phase correction circuit, 6: soft clip circuit, 7: addition circuit.
Claims (1)
成分による該増幅器の出力信号のクリツプを防止
する回路であつて、 可聴周波入力信号を低域成分と中高域成分とに
分割する帯域分割回路と、前記低域成分の振幅を
前記増幅器の入力レベルが無歪最大入力レベル以
下となるように非線形かつ滑らかに圧縮する振幅
制限回路と、振幅制限された低域成分と前記中高
域成分とを合成する帯域合成回路と を具備することを特徴とする低域クリツプ防止
回路。[Scope of Claim for Utility Model Registration] A circuit that is connected upstream of an audio frequency amplifier and prevents clipping of the output signal of the amplifier due to low frequency signal components, which divides the audio frequency input signal into low frequency components and middle and high frequency components. an amplitude limiting circuit that nonlinearly and smoothly compresses the amplitude of the low frequency component so that the input level of the amplifier is equal to or less than the undistorted maximum input level; A low frequency clip prevention circuit comprising: a band synthesis circuit for synthesizing the middle and high frequency components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3140389U JPH079452Y2 (en) | 1989-03-22 | 1989-03-22 | Low frequency clip prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3140389U JPH079452Y2 (en) | 1989-03-22 | 1989-03-22 | Low frequency clip prevention circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02123120U true JPH02123120U (en) | 1990-10-09 |
| JPH079452Y2 JPH079452Y2 (en) | 1995-03-06 |
Family
ID=31257242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3140389U Expired - Fee Related JPH079452Y2 (en) | 1989-03-22 | 1989-03-22 | Low frequency clip prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079452Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016171447A (en) * | 2015-03-12 | 2016-09-23 | キヤノン株式会社 | Audio processing apparatus and audio processing method |
-
1989
- 1989-03-22 JP JP3140389U patent/JPH079452Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016171447A (en) * | 2015-03-12 | 2016-09-23 | キヤノン株式会社 | Audio processing apparatus and audio processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079452Y2 (en) | 1995-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |