JPS6093349U - Different frequency signal discrimination circuit - Google Patents
Different frequency signal discrimination circuitInfo
- Publication number
- JPS6093349U JPS6093349U JP1983185063U JP18506383U JPS6093349U JP S6093349 U JPS6093349 U JP S6093349U JP 1983185063 U JP1983185063 U JP 1983185063U JP 18506383 U JP18506383 U JP 18506383U JP S6093349 U JPS6093349 U JP S6093349U
- Authority
- JP
- Japan
- Prior art keywords
- different frequency
- frequency signal
- discrimination circuit
- signal discrimination
- circuit
- 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
- Monitoring And Testing Of Transmission In General (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来回路の一例の回路図、第２図は帯域フィル
タの周波数特性を説明するための図、第３図Ａ〜Ｃは従
来回路における帯域フィルタの入力レベルとコンパレー
タの出力及び入力との関係を説明するための図、第４図
は本考案回路の一実施例の回路図、第５図Ａ〜Ｃは本考
案回路におけるＡＧＣ回路の入力レベルとコンパレータ
の出力及び入力との関係を説明するための図である。
１・・・テスト信号入力端子、３１，３゜・・・帯域フ
ィルタ、４□、４゜・・・検波器、５□、５□・・・コ
ンパレータ、６ｉ ＝ ６２・・・出力端子１．７・
・・自動利得制御（ＡＧＣ）回路。Fig. 1 is a circuit diagram of an example of a conventional circuit, Fig. 2 is a diagram for explaining the frequency characteristics of a bandpass filter, and Figs. 3A to C show the input level of the bandpass filter and the output and input of the comparator in the conventional circuit. 4 is a circuit diagram of an embodiment of the circuit of the present invention, and FIGS. 5A to 5C are diagrams for explaining the relationship between the input level of the AGC circuit and the output and input of the comparator in the circuit of the present invention. It is a figure for explaining. 1... Test signal input terminal, 31, 3°... Bandpass filter, 4□, 4°... Detector, 5□, 5□... Comparator, 6i = 62... Output terminal 1. 7.
...Automatic gain control (AGC) circuit.
Claims (1)
タに供給し、該複数のフィルタ出力信号を夫々検波した
後夫々基準電圧と比較して該検波して得た電圧が該基準
電圧以上であるか否かを判別することにより該入力信号
の周波数を判別する異周波数信号判別回路において、該
フィルタの前段に、所定電圧以上の入力を印加された場
合その出力を減衰する自動利得制御回路を設けてなる異
周波数信号判別回路。The input signal is supplied to a plurality of filters that each pass a different frequency, and after each of the plurality of filter output signals is detected, each is compared with a reference voltage to determine whether the voltage obtained by the detection is greater than or equal to the reference voltage. In the different frequency signal discriminating circuit that discriminates the frequency of the input signal by discriminating whether or not the input signal is present, an automatic gain control circuit is provided before the filter to attenuate the output when an input of a predetermined voltage or higher is applied. Different frequency signal discrimination circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983185063U JPS6093349U (en) | 1983-11-30 | 1983-11-30 | Different frequency signal discrimination circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983185063U JPS6093349U (en) | 1983-11-30 | 1983-11-30 | Different frequency signal discrimination circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6093349U true JPS6093349U (en) | 1985-06-26 |
Family
ID=30400095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983185063U Pending JPS6093349U (en) | 1983-11-30 | 1983-11-30 | Different frequency signal discrimination circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093349U (en) |
-
1983
- 1983-11-30 JP JP1983185063U patent/JPS6093349U/en active Pending
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