JPH0188514U - - Google Patents
Info
- Publication number
- JPH0188514U JPH0188514U JP18554787U JP18554787U JPH0188514U JP H0188514 U JPH0188514 U JP H0188514U JP 18554787 U JP18554787 U JP 18554787U JP 18554787 U JP18554787 U JP 18554787U JP H0188514 U JPH0188514 U JP H0188514U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- outputs
- section
- preamble
- amplifier
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- 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、第２
図は本実施例の動作を説明するためのタイミング
図である。
１…増幅器、２…検波器、３…比較器、４…プ
リアンブル検出部、５…直流増幅部。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a timing diagram for explaining the operation of this embodiment. DESCRIPTION OF SYMBOLS 1...Amplifier, 2...Detector, 3...Comparator, 4...Preamble detection part, 5...DC amplifier part.
Claims (1)
号に応じた利得で増幅し信号を出力する増幅器と
、この増幅器からの信号を包絡線検波した信号を
出力する検波器と、この検波器からの信号と基準
信号とを比較し差信号を出力する比較器と、前記
ＡＭ信号の分岐入力から検出した前記プリアンブ
ルパターンにより区間信号を出力するプリアンブ
ル検出部と、前記区間信号を受けたときは時定数
を小さくして前記比較器からの差信号を増幅し前
記制御信号を出力する直流増幅部とを有すること
を特徴とするＡＧＣ回路。 An amplifier that amplifies an AM signal including a preamble pattern with a gain according to a control signal and outputs the signal, a detector that outputs a signal obtained by envelope detection of the signal from this amplifier, and a signal from this detector and a reference signal. a preamble detection section that outputs a section signal based on the preamble pattern detected from the branch input of the AM signal, and a preamble detection section that reduces the time constant when receiving the section signal. An AGC circuit comprising: a DC amplification section that amplifies a difference signal from the comparator and outputs the control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18554787U JPH0188514U (en) | 1987-12-04 | 1987-12-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18554787U JPH0188514U (en) | 1987-12-04 | 1987-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0188514U true JPH0188514U (en) | 1989-06-12 |
Family
ID=31476852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18554787U Pending JPH0188514U (en) | 1987-12-04 | 1987-12-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0188514U (en) |
-
1987
- 1987-12-04 JP JP18554787U patent/JPH0188514U/ja active Pending