JPS6415417U - - Google Patents
Info
- Publication number
- JPS6415417U JPS6415417U JP10918087U JP10918087U JPS6415417U JP S6415417 U JPS6415417 U JP S6415417U JP 10918087 U JP10918087 U JP 10918087U JP 10918087 U JP10918087 U JP 10918087U JP S6415417 U JPS6415417 U JP S6415417U
- Authority
- JP
- Japan
- Prior art keywords
- agc
- circuit
- section
- control
- voltage
- 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 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression 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 12
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の第１の実施例を示すブロツク
図、第２図は本考案の第２の実施例を示すブロツ
ク図、第３図ａは第１図の実施例の検波出力と制
御電圧との関係の一例を示す特性図、第３図ｂは
第１図の実施例のＡＧＣ出力特性図、第４図ａ，
ｂおよびｃはそれぞれ第１図の実施例の受信信号
波形図ａ、検波出力波形図ｂおよび出力波形図ｃ
、第５図は従来のＡＧＣ回路のブロツク図、第６
図ａ，ｂおよびｃはそれぞれ第５図の従来のＡＧ
Ｃ回路の受信信号波形図ａ、検波出力波形図ｂお
よび出力波形図ｃである。
１……受波器、２……前置増幅器、３……ＡＧ
Ｃ部、４……ＡＧＣ制御部、５，８……振幅圧縮
検回路、６……リツプル除去回路、７……制御電
圧回路、３１……利得制御回路、３２……増幅器
、４１……検波回路、４２……直流増幅回路、５
１Ａ〜Ｃ……直流対数増幅器、５２Ａ〜Ｃ……抵
抗、５３Ａ〜Ｃ……ダイオード、５４……コンデ
ンサ、８１Ａ〜Ｃ……直線検波回路、８２Ａ〜Ｃ
……対数増幅回路、８３……加算回路。
Fig. 1 is a block diagram showing a first embodiment of the present invention, Fig. 2 is a block diagram showing a second embodiment of the invention, and Fig. 3a shows the detection output and control of the embodiment of Fig. 1. A characteristic diagram showing an example of the relationship with voltage, Figure 3b is an AGC output characteristic diagram of the embodiment of Figure 1, Figure 4a,
b and c are the received signal waveform diagram a, the detected output waveform diagram b, and the output waveform diagram c of the embodiment shown in FIG. 1, respectively.
, Figure 5 is a block diagram of a conventional AGC circuit, and Figure 6 is a block diagram of a conventional AGC circuit.
Figures a, b and c are respectively the conventional AG of Figure 5.
They are a received signal waveform diagram a, a detected output waveform diagram b, and an output waveform diagram c of the C circuit. 1...Receiver, 2...Preamplifier, 3...AG
C section, 4...AGC control unit, 5, 8...amplitude compression detection circuit, 6...ripple removal circuit, 7...control voltage circuit, 31...gain control circuit, 32...amplifier, 41...detection Circuit, 42...DC amplifier circuit, 5
1A-C...DC logarithmic amplifier, 52A-C...Resistor, 53A-C...Diode, 54...Capacitor, 81A-C...Linear detection circuit, 82A-C
... Logarithmic amplifier circuit, 83 ... Addition circuit.
Claims (1)
るＡＧＣ（Ａｕｔｏｍａｔｉｃ Ｇａｉｎ Ｃｏ
ｎｔｒｏｌ）部と、このＡＧＣ部における利得制
御に必要な制御信号を供給するＡＧＣ制御部とを
備えたＡＧＣ回路において、 前記ＡＧＣ制御部の入力を前記ＡＧＣ部の入力
段か受けてその入出力特性がほぼ対数特性を示す
よに圧縮権検波を行なつて入力を広くダイナミツ
クレンジにわたつて圧縮して検波した直流電圧を
出力する振幅圧縮検波回路と、 前記振幅圧縮検波回路の出力する直流電圧を受
けてこれに含まれるリツプルを除去して出力する
リツプル除去回路と、 前記リツプル除去回路の出力を受けてこれを基
準電圧と比較し差電圧を前記制御信号として前記
ＡＧＣ部に提供する制御電圧回路とを有するＡＧ
Ｃ制御部を備えて成ることを特徴とするＡＧＣ回
路。[Claims for Utility Model Registration] AGC (Automatic Gain Co.) that automatically controls the amplification gain of sonar reception signals
ntrol) section and an AGC control section that supplies a control signal necessary for gain control in this AGC section, wherein the input of the AGC control section is received through the input stage of the AGC section to determine its input/output characteristics. an amplitude compression detection circuit that compresses an input over a wide dynamic range and outputs the detected DC voltage by performing compression right detection so that the signal exhibits approximately logarithmic characteristics; and the DC voltage output from the amplitude compression detection circuit. a ripple removal circuit that receives the output of the ripple removal circuit, removes the ripples contained in the ripple removal circuit, and outputs the same; and a control voltage that receives the output of the ripple removal circuit, compares it with a reference voltage, and provides the difference voltage as the control signal to the AGC section. AG having a circuit
An AGC circuit comprising a C control section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10918087U JPS6415417U (en) | 1987-07-15 | 1987-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10918087U JPS6415417U (en) | 1987-07-15 | 1987-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415417U true JPS6415417U (en) | 1989-01-26 |
Family
ID=31345187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10918087U Pending JPS6415417U (en) | 1987-07-15 | 1987-07-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02284547A (en) * | 1989-04-25 | 1990-11-21 | Nec Corp | Orthogonal signal demodulation system |
-
1987
- 1987-07-15 JP JP10918087U patent/JPS6415417U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02284547A (en) * | 1989-04-25 | 1990-11-21 | Nec Corp | Orthogonal signal demodulation system |
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