JPH0213373U - - Google Patents
Info
- Publication number
- JPH0213373U JPH0213373U JP8995088U JP8995088U JPH0213373U JP H0213373 U JPH0213373 U JP H0213373U JP 8995088 U JP8995088 U JP 8995088U JP 8995088 U JP8995088 U JP 8995088U JP H0213373 U JPH0213373 U JP H0213373U
- Authority
- JP
- Japan
- Prior art keywords
- trigger signal
- synchronization signal
- monostable multivibrator
- output
- composite synchronization
- 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
- 239000002131 composite material Substances 0.000 claims 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図は本考案に係る周波数自動判別回路の一
実施例を示す回路図、第２図は第１図の実施例を
説明するためのタイミングチヤート、第３図は従
来の周波数自動判別回路を示す回路図、第４図は
第３図の動作を説明するためのタイミングチヤー
トである。
１…入力端子、２…単安定マルチバイブレータ
、３…積分回路、４…増幅回路、５…周波数／電
圧変換回路、Ｑ１，Ｑ２…トランジスタ、Ｒ４…
抵抗、Ｃ２…コンデンサ。
Fig. 1 is a circuit diagram showing an embodiment of an automatic frequency discrimination circuit according to the present invention, Fig. 2 is a timing chart for explaining the embodiment of Fig. 1, and Fig. 3 is a circuit diagram showing a conventional automatic frequency discrimination circuit. The circuit diagram shown in FIG. 4 is a timing chart for explaining the operation of FIG. 3. 1... Input terminal, 2... Monostable multivibrator, 3... Integrating circuit, 4... Amplifying circuit, 5... Frequency/voltage conversion circuit, Q1, Q2... Transistor, R4...
Resistor, C2...capacitor.
Claims (1)
づいてトリガ信号を発生するトリガ信号発生手段
と、 前記複合同期信号の垂直同期信号期間に前記ト
リガ信号の発生を遮断する制御手段と、 前記トリガ信号発生手段からのトリガ信号によ
つて一定パルス幅のパルスを出力する単安定マル
チバイブレータと、 この単安定マルチバイブレータの出力を積分し
て平均化し周波数判別出力を出力する積分回路と
を具備したことを特徴とする周波数自動判別回路
。[Claims for Utility Model Registration] Trigger signal generating means for introducing a composite synchronization signal and generating a trigger signal based on the composite synchronization signal, and blocking generation of the trigger signal during a vertical synchronization signal period of the composite synchronization signal. a monostable multivibrator that outputs a pulse with a constant pulse width in response to a trigger signal from the trigger signal generation means, and a monostable multivibrator that integrates and averages the output of the monostable multivibrator to output a frequency discrimination output. An automatic frequency discrimination circuit characterized by comprising an integrating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8995088U JPH0213373U (en) | 1988-07-08 | 1988-07-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8995088U JPH0213373U (en) | 1988-07-08 | 1988-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0213373U true JPH0213373U (en) | 1990-01-26 |
Family
ID=31314488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8995088U Pending JPH0213373U (en) | 1988-07-08 | 1988-07-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0213373U (en) |
-
1988
- 1988-07-08 JP JP8995088U patent/JPH0213373U/ja active Pending