JPS60145729U - Tracking type bandpass filter circuit - Google Patents
Tracking type bandpass filter circuitInfo
- Publication number
- JPS60145729U JPS60145729U JP3284184U JP3284184U JPS60145729U JP S60145729 U JPS60145729 U JP S60145729U JP 3284184 U JP3284184 U JP 3284184U JP 3284184 U JP3284184 U JP 3284184U JP S60145729 U JPS60145729 U JP S60145729U
- Authority
- JP
- Japan
- Prior art keywords
- bandpass filter
- tracking type
- filter
- output
- phase 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
Landscapes
- Filters And Equalizers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の追尾形帯域Ｐ波回路を示す構成図、第２
図は第１図の帯域ろ波器の特性を示す図、第３図はこの
考案の一実施例を示す追尾形帯域ろ波回路の構成図であ
る。
図中１，７は入力端子、２・・・は出力端子、３は帯域
ろ波器、４は位相検波器、５は低域ろ波器、６は増幅器
、６′は利得可変形増幅器である。なお図中同一あるい
は相当部分には同一符号を付して示しである。Figure 1 is a configuration diagram showing a conventional tracking type band P-wave circuit;
This figure is a diagram showing the characteristics of the bandpass filter shown in FIG. 1, and FIG. 3 is a block diagram of a tracking type bandpass filter circuit showing an embodiment of this invention. In the figure, 1 and 7 are input terminals, 2... are output terminals, 3 is a bandpass filter, 4 is a phase detector, 5 is a low-pass filter, 6 is an amplifier, and 6' is a variable gain amplifier. be. In the drawings, the same or corresponding parts are designated by the same reference numerals.
Claims (1)
位相検波器の出力を低域ろ波器を介して上記帯域戸波器
に印加せしめ、上記帯域ろ波器の中心周波数を入力周波
数と同一になるように制御する追尾形帯域戸波回路にお
いて、上記位相検波器、および低域ろ波器とから構成さ
れる帯域戸波器の中心周波数制御ルニプに上記低域戸波
器の出力を増幅する利得可変形の増幅器を設は上記増幅
器の利得を同期確立を検出した同期信号により可変する
ことを特徴とする追尾形帯域戸波回路。Detect the input/output phase difference of the bandpass filter with a phase detector, apply the output of the phase detector to the bandpass filter via a low-pass filter, and input the center frequency of the bandpass filter. In a tracking type bandpass filter circuit that controls the frequency to be the same as the frequency, the output of the lowpass filter is amplified by the center frequency control circuit of the bandpass filter, which is composed of the phase detector and the lowpass filter. A tracking type band door wave circuit, characterized in that a variable gain amplifier is provided, and the gain of the amplifier is varied in accordance with a synchronization signal that detects the establishment of synchronization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3284184U JPS60145729U (en) | 1984-03-07 | 1984-03-07 | Tracking type bandpass filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3284184U JPS60145729U (en) | 1984-03-07 | 1984-03-07 | Tracking type bandpass filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60145729U true JPS60145729U (en) | 1985-09-27 |
Family
ID=30534732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3284184U Pending JPS60145729U (en) | 1984-03-07 | 1984-03-07 | Tracking type bandpass filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60145729U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439807A (en) * | 1987-08-05 | 1989-02-10 | Matsushita Electric Ind Co Ltd | Filter frequency controller |
| JPH02203608A (en) * | 1989-02-02 | 1990-08-13 | Matsushita Electric Ind Co Ltd | Filter frequency controller |
-
1984
- 1984-03-07 JP JP3284184U patent/JPS60145729U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439807A (en) * | 1987-08-05 | 1989-02-10 | Matsushita Electric Ind Co Ltd | Filter frequency controller |
| JPH02203608A (en) * | 1989-02-02 | 1990-08-13 | Matsushita Electric Ind Co Ltd | Filter frequency controller |
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