JPH032269U - - Google Patents
Info
- Publication number
- JPH032269U JPH032269U JP6258489U JP6258489U JPH032269U JP H032269 U JPH032269 U JP H032269U JP 6258489 U JP6258489 U JP 6258489U JP 6258489 U JP6258489 U JP 6258489U JP H032269 U JPH032269 U JP H032269U
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- frequency
- deviation
- bandpass filter
- gain
- 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 5
- 230000005856 abnormality Effects 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Networks Using Active Elements (AREA)
Description
第１図は本考案の一実施例に係る周波数異常検
出回路の構成を示すブロツク図、第２図は第１図
の回路におけるバンドパスフイルタの特性図、第
３図は同じくバンドパスフイルタの出力信号を示
す波形図、第４図は従来の周波数異常検出回路の
構成例を示すブロツク図、第５図は第４図の回路
の各部の信号を示す波形図、第６図は従来の周波
数異常検出回路の他の構成例を示すブロツク図で
ある。
１３……バンドパスフイルタ、１４……反転回
路、１５……加算器、１６……絶対値回路、１８
……コンパレータ。
Fig. 1 is a block diagram showing the configuration of a frequency abnormality detection circuit according to an embodiment of the present invention, Fig. 2 is a characteristic diagram of the bandpass filter in the circuit of Fig. 1, and Fig. 3 is the output of the bandpass filter. Figure 4 is a block diagram showing a configuration example of a conventional frequency abnormality detection circuit. Figure 5 is a waveform diagram showing signals of each part of the circuit in Figure 4. Figure 6 is a conventional frequency abnormality detection circuit. FIG. 3 is a block diagram showing another example of the configuration of the detection circuit. 13...Band pass filter, 14...Inverting circuit, 15...Adder, 16...Absolute value circuit, 18
……comparator.
Claims (1)
て、 入力信号を濾過するものであつて、入力信号の
周波数が適正周波数であるとき、利得がほぼ１で
あり位相ずれを発生せず、入力信号の周波数が適
正周波数から外れたとき、利得の変化および位相
ずれの少なくとも一方が発生するバンドパスフイ
ルタと、 このバンドパスフイルタの出力と入力信号の偏
差をとる偏差検出部と、 この偏差の絶対値を基準値と比較し、偏差が基
準値をこえるときに異常検出信号を出力する比較
器と を具備することを特徴とする周波数異常検出回
路。[Claims for Utility Model Registration] In a device that detects a frequency shift of an input signal, the input signal is filtered, and when the frequency of the input signal is a proper frequency, the gain is approximately 1 and the phase shift is detected. a bandpass filter that generates at least one of a change in gain and a phase shift when the frequency of the input signal deviates from the appropriate frequency; and a deviation detector that detects the deviation between the output of the bandpass filter and the input signal. , and a comparator that compares the absolute value of this deviation with a reference value and outputs an abnormality detection signal when the deviation exceeds the reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6258489U JPH032269U (en) | 1989-05-30 | 1989-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6258489U JPH032269U (en) | 1989-05-30 | 1989-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032269U true JPH032269U (en) | 1991-01-10 |
Family
ID=31591867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6258489U Pending JPH032269U (en) | 1989-05-30 | 1989-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280055A (en) * | 2007-05-09 | 2008-11-20 | Daiki:Kk | Pocket tissue paper pack container |
-
1989
- 1989-05-30 JP JP6258489U patent/JPH032269U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280055A (en) * | 2007-05-09 | 2008-11-20 | Daiki:Kk | Pocket tissue paper pack container |
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