JPS6365313U - - Google Patents
Info
- Publication number
- JPS6365313U JPS6365313U JP16037586U JP16037586U JPS6365313U JP S6365313 U JPS6365313 U JP S6365313U JP 16037586 U JP16037586 U JP 16037586U JP 16037586 U JP16037586 U JP 16037586U JP S6365313 U JPS6365313 U JP S6365313U
- Authority
- JP
- Japan
- Prior art keywords
- level
- circuit
- average amplitude
- output
- amplitude 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
- 230000003321 amplification Effects 0.000 claims 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims 3
- 238000001514 detection method Methods 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Communication Control (AREA)
Description
第１図は本考案によるＡＧＣ回路の一実施例を
示すブロツク図、第２図はその各部の電圧波形を
示す図、第３図は従来のデジタルＡＧＣ回路を示
すブロツク図である。
１：入力端子、４：ローパスフイルタ、６，１
３：切換回路。
FIG. 1 is a block diagram showing one embodiment of the AGC circuit according to the present invention, FIG. 2 is a diagram showing voltage waveforms at various parts thereof, and FIG. 3 is a block diagram showing a conventional digital AGC circuit. 1: Input terminal, 4: Low pass filter, 6, 1
3: Switching circuit.
Claims (1)
の平均振幅レベルを検出し、その平均振幅レベル
と基準出力レベルとのレベル差が所定値以下にな
るまで前記増幅回路の増幅利得を前記平均振幅レ
ベルに応じて切換設定して行き、前記レベル差が
上記所定値以下になつたときに前記平均振幅レベ
ルと前記基準出力レベルの大小比較を行なう比較
回路の出力によつて前記増幅利得をアツプダウン
させるようにしたＡＧＣ回路に於いて、前記入力
信号の振幅のピーク値を保持するピークホールド
回路と、このピークホールド回路の出力が予め設
定されたレベル以下になつたときに検出出力を呈
する比較回路を設け、この比較回路に上記検出出
力が生じたときに、前記増幅回路に対して前記平
均振幅レベルに応じた増幅利得の設定動作を開始
するようにしたことを特徴とするデジタルＡＧＣ
回路。 Detecting the average amplitude level of the input signal obtained through the programmable amplifier circuit, and switching the amplification gain of the amplifier circuit according to the average amplitude level until the level difference between the average amplitude level and a reference output level becomes equal to or less than a predetermined value. an AGC circuit that increases or decreases the amplification gain by the output of a comparison circuit that compares the average amplitude level with the reference output level when the level difference becomes equal to or less than the predetermined value; A peak hold circuit that holds the peak value of the amplitude of the input signal and a comparison circuit that provides a detection output when the output of the peak hold circuit becomes equal to or less than a preset level are provided, and the comparison circuit The digital AGC is characterized in that when the detection output occurs in the digital AGC, an operation for setting an amplification gain according to the average amplitude level is started for the amplifier circuit.
circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16037586U JPS6365313U (en) | 1986-10-20 | 1986-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16037586U JPS6365313U (en) | 1986-10-20 | 1986-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365313U true JPS6365313U (en) | 1988-04-30 |
Family
ID=31085699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16037586U Pending JPS6365313U (en) | 1986-10-20 | 1986-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365313U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679511A (en) * | 1979-12-04 | 1981-06-30 | Ricoh Co Ltd | Automatic gain control circuit |
-
1986
- 1986-10-20 JP JP16037586U patent/JPS6365313U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679511A (en) * | 1979-12-04 | 1981-06-30 | Ricoh Co Ltd | Automatic gain control circuit |
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