JPS6295334U - - Google Patents
Info
- Publication number
- JPS6295334U JPS6295334U JP18615685U JP18615685U JPS6295334U JP S6295334 U JPS6295334 U JP S6295334U JP 18615685 U JP18615685 U JP 18615685U JP 18615685 U JP18615685 U JP 18615685U JP S6295334 U JPS6295334 U JP S6295334U
- Authority
- JP
- Japan
- Prior art keywords
- bandpass filter
- signal
- frequency
- local oscillator
- band
- 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 4
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の信号探索装置の一実施例の構
成図、第２図は信号探策全周波帯域を狭い帯域幅
ｂ１のｎ倍広い帯域幅ｂ２で分割した図、第３図
は第２図の帯域中信号の見つかつた帯域を狭い帯
域幅ｂ１で分割した図、第４図は従来例の構成図
、第５図は信号探索全周帯域を狭い帯域幅ｂ１で
分割した図である。
１……周波数変換器、２……局部発振器、３…
…帯域通過フイルタ、４……レベル検出回路、５
……制御回路、Ｗ……信号探索全周波帯域、ｂ１
……狭い帯域幅、ｂ２……ｂ１のｎ倍広い帯域幅
。
Fig. 1 is a block diagram of an embodiment of the signal search device of the present invention, Fig. 2 is a diagram in which the signal search full frequency band is divided into a narrow band width b 1 and a band width b 2 that is n times wider, and Fig. 3 is a diagram in which the band in which the signal was found in the band in Figure 2 is divided by a narrow bandwidth b1 , Figure 4 is a configuration diagram of a conventional example, and Figure 5 is a diagram in which the signal search all-round band is divided by a narrow bandwidth b1. This is a diagram. 1... Frequency converter, 2... Local oscillator, 3...
...bandpass filter, 4...level detection circuit, 5
...Control circuit, W...Signal search full frequency band, b 1
... Narrow bandwidth, b 2 ... Bandwidth n times wider than b 1 .
Claims (1)
力とし、複数の帯域幅を有する帯域通過フイルタ
と、 前記帯域通過フイルタの出力レベルを検出する
レベル検出回路と、 局部発振器および帯域通過フイルタを制御して
入力信号を探索する周波数帯を順次ずらし、レベ
ル検出回路の検出レベルにより入力信号の存在す
る周波数帯を検出する制御回路であつて、帯域通
過フイルタをまず最も広い帯域幅に設定して信号
探索し、信号の発見された帯域内を帯域通過フイ
ルタの帯域幅を順次狭くして探索し、周波数帯を
しぼりこんで前述の動作を繰返す制御回路を有す
る信号探索装置。[Claims for Utility Model Registration] A frequency converter that converts the frequency of an input signal; a local oscillator for the frequency converter; and a signal frequency-converted by the frequency converter, which has a plurality of bandwidths as an input. a bandpass filter; a level detection circuit that detects the output level of the bandpass filter; and a local oscillator and a bandpass filter that control a local oscillator and the bandpass filter to sequentially shift the frequency band in which the input signal is searched, and detect the input signal according to the detection level of the level detection circuit. A control circuit that detects the frequency band in which a signal exists, first setting a bandpass filter to the widest bandwidth to search for a signal, and then sequentially narrowing the bandwidth of the bandpass filter within the band where the signal is found. A signal search device that includes a control circuit that searches, narrows down a frequency band, and repeats the above operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18615685U JPS6295334U (en) | 1985-12-02 | 1985-12-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18615685U JPS6295334U (en) | 1985-12-02 | 1985-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6295334U true JPS6295334U (en) | 1987-06-18 |
Family
ID=31135453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18615685U Pending JPS6295334U (en) | 1985-12-02 | 1985-12-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6295334U (en) |
-
1985
- 1985-12-02 JP JP18615685U patent/JPS6295334U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS561619A (en) | Phase comparator | |
| JPS6295334U (en) | ||
| JPS5513512A (en) | Frequency converter | |
| JPS61122583U (en) | ||
| SU465716A1 (en) | Electrical signal delay device | |
| JPS62195771U (en) | ||
| JPS58123635U (en) | Receiving machine | |
| JPS5336426A (en) | Photoelectric converter device | |
| JPS6421517U (en) | ||
| JPH0195676U (en) | ||
| JPS62193157U (en) | ||
| JPS6312921U (en) | ||
| JPS6188345U (en) | ||
| JPS6258930U (en) | ||
| DOTSENKO et al. | Method for fault point determination in the dynamic system | |
| JPS5826674U (en) | Characteristic measurement circuit of reverberation adding device | |
| JPH036341U (en) | ||
| JPH0358043U (en) | ||
| JPS6316733U (en) | ||
| JPS6355601U (en) | ||
| JPS6242377U (en) | ||
| JPS586452U (en) | AM receiver | |
| JPS62100711U (en) | ||
| JPH0195675U (en) | ||
| JPS5946050U (en) | wireless receiving device |