JPH0193660U - - Google Patents
Info
- Publication number
- JPH0193660U JPH0193660U JP18828287U JP18828287U JPH0193660U JP H0193660 U JPH0193660 U JP H0193660U JP 18828287 U JP18828287 U JP 18828287U JP 18828287 U JP18828287 U JP 18828287U JP H0193660 U JPH0193660 U JP H0193660U
- Authority
- JP
- Japan
- Prior art keywords
- correction circuit
- frequency
- aperture correction
- circuit
- output
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図乃至第２図はこの考案に係る復調回路の
周波数特性補正回路の実施例を示し、第１図はブ
ロツク図、第２図Ａ，Ｂ，Ｃは各部の周波数特性
を表した特性図である。第３図は従来例のブロツ
ク図である。
主な番号、符号の説明、２……サンプルホール
ド回路、４，５，２０……ローパスフイルタ、６
，７，２１……アパーチヤ補正回路、８，９……
アンプ、Ｓ１，Ｓ２，Ｓ３……切換スイツチ。
1 and 2 show an embodiment of the frequency characteristic correction circuit of the demodulation circuit according to this invention, FIG. 1 is a block diagram, and FIG. 2 A, B, and C are characteristic diagrams showing the frequency characteristics of each part. It is. FIG. 3 is a block diagram of a conventional example. Explanation of main numbers and symbols, 2... Sample hold circuit, 4, 5, 20... Low pass filter, 6
, 7, 21...Aperture correction circuit, 8, 9...
Amplifier, S1, S2, S3...changeover switch.
Claims (1)
るサンプルホールド回路を用い、ローパスフイル
タ回路とアパーチヤ補正回路で構成された、復調
回路の周波数特性補正回路において、 第１に高いカツトオフ周波数に設定した第１の
ローパスフイルタと、このカツトオフ周波数近傍
の高域領域で利得を上げて、高域を上昇させた周
波数特性を備えた第１のアパーチヤ補正回路と、
第２に高いカツトオフ周波数に設定された第２の
ローパスフイルタと、このカツトオフ周波数近傍
の高域領域で利得を上げて、高域を上昇させた周
波数特性を備えた第２のアパーチヤ補正回路とを
縦属接続して構成し、上記第１のアパーチヤ補正
回路の出力と、第２のアパーチヤ補正回路の出力
を、サンプリング周波数に対応して切換える切換
手段とを備え、出力アンプで増幅して出力するよ
うに構成したことを特徴とする復調回路の周波数
特性補正回路。[Claim for Utility Model Registration] A frequency characteristic correction circuit for a demodulation circuit that uses a sample hold circuit that samples in accordance with the sampling frequency and is composed of a low-pass filter circuit and an aperture correction circuit. a set first low-pass filter; a first aperture correction circuit having a frequency characteristic that increases the gain in the high frequency region near the cutoff frequency to raise the high frequency region;
A second low-pass filter set to a second highest cutoff frequency, and a second aperture correction circuit that increases the gain in the high frequency region near the cutoff frequency and has frequency characteristics that raise the high frequency region. The first aperture correction circuit and the second aperture correction circuit are configured to be connected in series, and include switching means for switching the output of the first aperture correction circuit and the output of the second aperture correction circuit in accordance with the sampling frequency, and are amplified by an output amplifier and output. A frequency characteristic correction circuit for a demodulation circuit, characterized in that it is configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18828287U JPH0713089Y2 (en) | 1987-12-12 | 1987-12-12 | Frequency characteristic correction circuit for demodulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18828287U JPH0713089Y2 (en) | 1987-12-12 | 1987-12-12 | Frequency characteristic correction circuit for demodulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0193660U true JPH0193660U (en) | 1989-06-20 |
| JPH0713089Y2 JPH0713089Y2 (en) | 1995-03-29 |
Family
ID=31479384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18828287U Expired - Lifetime JPH0713089Y2 (en) | 1987-12-12 | 1987-12-12 | Frequency characteristic correction circuit for demodulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713089Y2 (en) |
-
1987
- 1987-12-12 JP JP18828287U patent/JPH0713089Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0713089Y2 (en) | 1995-03-29 |
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