JPS63158021U - - Google Patents
Info
- Publication number
- JPS63158021U JPS63158021U JP5063487U JP5063487U JPS63158021U JP S63158021 U JPS63158021 U JP S63158021U JP 5063487 U JP5063487 U JP 5063487U JP 5063487 U JP5063487 U JP 5063487U JP S63158021 U JPS63158021 U JP S63158021U
- Authority
- JP
- Japan
- Prior art keywords
- automatic gain
- gain control
- output voltage
- noise
- envelope detector
- 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
- 238000000605 extraction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003595 spectral effect Effects 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を示すブロツク図、
第２図は第１図の自動利得制御器の出力に含まれ
る雑音のスペクトル分布図、第３図は第１図の乗
積検波器の出力のスペクトル分布図である。
１……帯域波器、２……自動利得制御受信器
、３……包絡線検波器、４……移相器、５……乗
積検波器、６……低域波器、７……包絡線検波
器、８……非線形増幅器、９……減算器、１０…
…雑音成分抽出回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
2 is a spectral distribution diagram of noise included in the output of the automatic gain controller of FIG. 1, and FIG. 3 is a spectral distribution diagram of the output of the product detector of FIG. 1. 1...Band wave detector, 2...Automatic gain control receiver, 3...Envelope detector, 4...Phase shifter, 5...Product detector, 6...Low frequency detector, 7... Envelope detector, 8... Nonlinear amplifier, 9... Subtractor, 10...
...Noise component extraction circuit.
Claims (1)
号を出力する自動利得制御回路において、自動利
得制御受信器と、この自動利得制御受信器の出力
電圧を検出する包絡線検波器と、自動利得制御器
の出力電圧の中の雑音電圧成分を抽出する雑音成
分抽出回路と、前記抽出された雑音電圧成分を前
記包絡線検波器の検出した出力電圧に含まれる雑
音電圧に等しく非線形増幅するための非線形増幅
器と、前記包絡線検波器の出力電圧の中の雑音電
圧成分から前記非線形増幅器の出力電圧である雑
音電圧成分を差引きこれを自動利得制御電圧とし
て前記自動利得制御受信器に供給する減算器とを
備えて自動利得制御を行なうことを特徴とする自
動利得制御回路。 An automatic gain control circuit that suppresses fluctuations in the input signal level and outputs a signal at a constant level includes an automatic gain control receiver, an envelope detector that detects the output voltage of the automatic gain control receiver, and an automatic gain controller. a noise component extraction circuit for extracting a noise voltage component from the output voltage of the envelope detector; and a nonlinear amplifier for nonlinearly amplifying the extracted noise voltage component to be equal to the noise voltage included in the output voltage detected by the envelope detector. and a subtracter that subtracts the noise voltage component that is the output voltage of the nonlinear amplifier from the noise voltage component in the output voltage of the envelope detector and supplies this to the automatic gain control receiver as an automatic gain control voltage. An automatic gain control circuit characterized in that it performs automatic gain control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5063487U JPS63158021U (en) | 1987-04-02 | 1987-04-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5063487U JPS63158021U (en) | 1987-04-02 | 1987-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63158021U true JPS63158021U (en) | 1988-10-17 |
Family
ID=30874170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5063487U Pending JPS63158021U (en) | 1987-04-02 | 1987-04-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63158021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001024459A (en) * | 1999-07-07 | 2001-01-26 | Alpine Electronics Inc | Audio device |
-
1987
- 1987-04-02 JP JP5063487U patent/JPS63158021U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001024459A (en) * | 1999-07-07 | 2001-01-26 | Alpine Electronics Inc | Audio device |
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