JPS6384769U - - Google Patents
Info
- Publication number
- JPS6384769U JPS6384769U JP18026386U JP18026386U JPS6384769U JP S6384769 U JPS6384769 U JP S6384769U JP 18026386 U JP18026386 U JP 18026386U JP 18026386 U JP18026386 U JP 18026386U JP S6384769 U JPS6384769 U JP S6384769U
- Authority
- JP
- Japan
- Prior art keywords
- switching circuit
- signal
- supplied
- pass filter
- frequency
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図及び第２図はこの考案に係る信号切り換
え回路をＲ―ＤＡＴの入力信号処理回路に適用し
た場合の一例を示す要部の系統図、第３図は従来
の信号処理系の系統図、第４図はその説明に供す
る周波数特性図である。
２……ローパスフイルタ、３……サンプリング
ホールド回路、４……Ａ／Ｄ変換器、１１……ス
イツチング回路、１２……ハイパスフイルタ、１
３……レベル検出回路、１４……制御部（マイク
ロコンピユータ）、Ｓａ……入力信号、Ｓｄ……
高域信号、Ｓｅ……検出出力。
Figures 1 and 2 are system diagrams of essential parts showing an example of the case where the signal switching circuit according to this invention is applied to the input signal processing circuit of R-DAT, and Figure 3 is a system diagram of a conventional signal processing system. , FIG. 4 is a frequency characteristic diagram for explaining this. 2...Low pass filter, 3...Sampling hold circuit, 4...A/D converter, 11...Switching circuit, 12...High pass filter, 1
3...Level detection circuit, 14...Control unit (microcomputer), Sa...Input signal, Sd...
High frequency signal, Se...detection output.
Claims (1)
ツチング回路に供給されると共に、 上記入力信号が直接上記スイツチング回路に供
給され、 上記入力信号がハイパスフイルタに供給されて
上記ローパスフイルタのカツトオフ周波数以上の
高域成分が抽出され、 抽出されたこの高域成分が所定のレベル以上で
あるときには、上記スイツチング回路によつて上
記ローパスフイルタの出力が選択されるようにな
されたことを特徴とする信号切り換え回路。 (2) 上記スイツチング回路の出力がＡ／Ｄ変換
器に供給されたのち、そのデジタル信号がＰＣＭ
記録されるようになされたことを特徴とする実用
新案登録請求の範囲第１項記載の信号切り換え回
路。 (3) 抽出された高域信号に基づいて形成された
検出出力で直接上記スイツチング回路が制御され
るようになされたことを特徴とする実用新案登録
請求の範囲第１項記載の信号切り換え回路。 (4) 抽出された高域信号がマイクロコンピユー
タに供給され、ここにおいて上記高域信号を含む
入力信号であると判断されたとき、このマイクロ
コンピユータからの指令信号で上記スイツチング
回路が制御されるようになされたことを特徴とす
る実用新案登録請求の範囲第１項記載の信号切り
換え回路。[Claims for Utility Model Registration] (1) The input signal is supplied to the switching circuit via a low-pass filter, the input signal is directly supplied to the switching circuit, the input signal is supplied to the high-pass filter, and the above-mentioned input signal is supplied to the switching circuit through the low-pass filter. A high-frequency component higher than a cut-off frequency of the low-pass filter is extracted, and when the extracted high-frequency component is higher than a predetermined level, the output of the low-pass filter is selected by the switching circuit. A signal switching circuit featuring: (2) After the output of the above switching circuit is supplied to the A/D converter, the digital signal is converted into PCM
The signal switching circuit according to claim 1, characterized in that the signal switching circuit is configured to be recorded. (3) The signal switching circuit according to claim 1, wherein the switching circuit is directly controlled by a detection output formed based on the extracted high-frequency signal. (4) The extracted high-frequency signal is supplied to the microcomputer, and when it is determined that the input signal includes the high-frequency signal, the switching circuit is controlled by a command signal from the microcomputer. 1. A signal switching circuit according to claim 1, which is characterized in that the circuit is made by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18026386U JPH064451Y2 (en) | 1986-11-22 | 1986-11-22 | Signal switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18026386U JPH064451Y2 (en) | 1986-11-22 | 1986-11-22 | Signal switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6384769U true JPS6384769U (en) | 1988-06-03 |
| JPH064451Y2 JPH064451Y2 (en) | 1994-02-02 |
Family
ID=31124064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18026386U Expired - Lifetime JPH064451Y2 (en) | 1986-11-22 | 1986-11-22 | Signal switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064451Y2 (en) |
-
1986
- 1986-11-22 JP JP18026386U patent/JPH064451Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH064451Y2 (en) | 1994-02-02 |
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