JPS61158724U - - Google Patents
Info
- Publication number
- JPS61158724U JPS61158724U JP4266385U JP4266385U JPS61158724U JP S61158724 U JPS61158724 U JP S61158724U JP 4266385 U JP4266385 U JP 4266385U JP 4266385 U JP4266385 U JP 4266385U JP S61158724 U JPS61158724 U JP S61158724U
- Authority
- JP
- Japan
- Prior art keywords
- variable gain
- gain circuit
- input level
- set value
- 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
- 230000005236 sound signal Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例のブロツク図であり
、第２図は上記実施例のシステムコントロール部
で行なわれる入力レベル自動設定の処理のフロー
チヤートである。
１…入力端子、２…利得可変回路、３…Ａ／Ｄ
変換器、４，５…出力端子、６…保持回路、７…
システムコントロール部、８…スイツチパネル。
FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a flowchart of the automatic input level setting process carried out by the system control section of the above embodiment. 1...Input terminal, 2...Variable gain circuit, 3...A/D
Converter, 4, 5... Output terminal, 6... Holding circuit, 7...
System control section, 8... switch panel.
Claims (1)
ベル設定用のスイツチと、オーデイオ信号及び該
オーデイオ信号に先立つて基準信号が入力される
利得可変回路と、該利得可変回路の出力をデジタ
ル化するＡ／Ｄ変換器と、該Ａ／Ｄ変換器出力の
上記基準信号のレベルのデータを保持する保持回
路と、上記設定値と上記保持回路より得られる保
持値との比較誤差を得る手段と、該比較誤差に応
じて上記利得可変回路を制御する制御手段とを備
え、上記入力レベル設定用のスイツチの操作があ
つたときに上記制御手段により上記利得可変回路
を制御して上記利得可変回路の出力レベルを上記
設定値に等しくするようにしたことを特徴とする
オーデイオ入力レベル自動設定装置。 means for storing a set value of an input level; a switch for setting the input level; a variable gain circuit to which an audio signal and a reference signal are input prior to the audio signal; and A for digitizing the output of the variable gain circuit. a /D converter, a holding circuit for holding level data of the reference signal output from the A/D converter, means for obtaining a comparison error between the set value and the held value obtained from the holding circuit; control means for controlling the variable gain circuit in accordance with a comparison error; when the switch for setting the input level is operated, the control means controls the variable gain circuit to control the output of the variable gain circuit; An audio input level automatic setting device characterized in that the level is made equal to the above set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4266385U JPS61158724U (en) | 1985-03-25 | 1985-03-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4266385U JPS61158724U (en) | 1985-03-25 | 1985-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61158724U true JPS61158724U (en) | 1986-10-01 |
Family
ID=30553628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4266385U Pending JPS61158724U (en) | 1985-03-25 | 1985-03-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61158724U (en) |
-
1985
- 1985-03-25 JP JP4266385U patent/JPS61158724U/ja active Pending
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