JPS5826216U - automatic level adjustment circuit - Google Patents
automatic level adjustment circuitInfo
- Publication number
- JPS5826216U JPS5826216U JP11939581U JP11939581U JPS5826216U JP S5826216 U JPS5826216 U JP S5826216U JP 11939581 U JP11939581 U JP 11939581U JP 11939581 U JP11939581 U JP 11939581U JP S5826216 U JPS5826216 U JP S5826216U
- Authority
- JP
- Japan
- Prior art keywords
- level
- adjustment circuit
- audio signal
- level adjustment
- automatic level
- 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
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 2
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の自動レベル調整回路の回路図、第２図は
本考案になる自動レベル調整回路の一実施例の回路図で
ある。
図中、符号１は入力端子、２は音声信号増幅器、３は自
動レベル調整回路、４は入側端子、５は出側端子、６は
倍電圧整流回路、７は出力端子、８は高レベル変動検出
回路、９はリップルフィルタ、１０はレベル設定回路、
Ｃ１は゛倍電圧コンデンサ、Ｃ２は平滑コンデンサ、Ｑ
１＋ Ｑ２はトランジスタ、Ｑ３は高しベ／Ｌ／検出ト
ランジスタ、Ｑ４は放電用トランジスタである。FIG. 1 is a circuit diagram of a conventional automatic level adjustment circuit, and FIG. 2 is a circuit diagram of an embodiment of the automatic level adjustment circuit according to the present invention. In the figure, 1 is an input terminal, 2 is an audio signal amplifier, 3 is an automatic level adjustment circuit, 4 is an input terminal, 5 is an output terminal, 6 is a voltage doubler rectifier circuit, 7 is an output terminal, and 8 is a high level A fluctuation detection circuit, 9 a ripple filter, 10 a level setting circuit,
C1 is a voltage doubler capacitor, C2 is a smoothing capacitor, Q
1+ Q2 is a transistor, Q3 is a high level/L/detection transistor, and Q4 is a discharge transistor.
Claims (1)
該平滑コンデンサの電荷に応じて音声信号増幅器のレベ
ル調整を行なうよう構成された自動レベル調整回路にお
いて、前記音声信号の入力レベルが、所定の高レベルと
変動したことを検知するレベル変動検出手段と、該レベ
ル変動検出手段で所定の高レベルへの変動が検出された
とき、前記平滑コンデンサの電荷を放電する放電手段と
を備え、音声信号の入力レベルが急激に変化したときレ
ベル調整が遅延しないよう構成したことを特徴とする自
動レベル調整回路。Input the audio signal to a rectifier circuit equipped with a smoothing capacitor,
The automatic level adjustment circuit configured to adjust the level of the audio signal amplifier according to the charge of the smoothing capacitor, further comprising level fluctuation detection means for detecting that the input level of the audio signal has changed from a predetermined high level. and discharging means for discharging the charge of the smoothing capacitor when the level fluctuation detecting means detects a fluctuation to a predetermined high level, so that the level adjustment is not delayed when the input level of the audio signal suddenly changes. An automatic level adjustment circuit characterized in that it is configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11939581U JPS5826216U (en) | 1981-08-13 | 1981-08-13 | automatic level adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11939581U JPS5826216U (en) | 1981-08-13 | 1981-08-13 | automatic level adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5826216U true JPS5826216U (en) | 1983-02-19 |
Family
ID=29913457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11939581U Pending JPS5826216U (en) | 1981-08-13 | 1981-08-13 | automatic level adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5826216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60119663U (en) * | 1984-01-23 | 1985-08-13 | 三上 正夫 | car roof lining |
-
1981
- 1981-08-13 JP JP11939581U patent/JPS5826216U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60119663U (en) * | 1984-01-23 | 1985-08-13 | 三上 正夫 | car roof lining |
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