JPS5819510U - FM detection circuit - Google Patents
FM detection circuitInfo
- Publication number
- JPS5819510U JPS5819510U JP11107181U JP11107181U JPS5819510U JP S5819510 U JPS5819510 U JP S5819510U JP 11107181 U JP11107181 U JP 11107181U JP 11107181 U JP11107181 U JP 11107181U JP S5819510 U JPS5819510 U JP S5819510U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- circuit
- bandpass filter
- output
- detection
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はＦＭ検波回路の従来例を示すブロック図、第２
図は本考案のＦＭ検波回路を示すブロック図、第３図は
本考案の動作を説明する各部の波形を示す波形図、第４
図は本考案に係る帯域特性を示す特性図、第５図は本考
案の要部の具体的実施例を示す回路図である。
２・・・増幅器、４・・・ＦＭ検波器、６・・・可変帯
域フィルタ、７・・・整流回路、Ｃ２，Ｃ５・・・コン
デンサ、Ｌｌ・・・コイル、Ｑ２・・・ＦＥＴ、 Ｑ４
． Ｑｓ・・・トランジスタ、Ｒ３，Ｒ１・・・抵抗。Figure 1 is a block diagram showing a conventional example of an FM detection circuit;
The figure is a block diagram showing the FM detection circuit of the present invention, Figure 3 is a waveform diagram showing the waveforms of each part to explain the operation of the present invention, and Figure 4 is a waveform diagram showing the waveforms of each part to explain the operation of the present invention.
The figure is a characteristic diagram showing the band characteristics according to the present invention, and FIG. 5 is a circuit diagram showing a specific embodiment of the main part of the present invention. 2... Amplifier, 4... FM detector, 6... Variable band filter, 7... Rectifier circuit, C2, C5... Capacitor, Ll... Coil, Q2... FET, Q4
．． Qs...transistor, R3, R1...resistance.
Claims (1)
帯域フィルタを通して検波するＦＭ検波回路において、
検波出力を整流する整流回路と、前記整流回路出力の供
給を受けて前記帯域フィルタの帯域幅が可変する可変イ
ンピーダンス手段とを設けることを特徴とするＦＭ検波
回路。In an FM detection circuit that amplifies a frequency-modulated signal and detects it through a bandpass filter having a predetermined bandwidth,
An FM detection circuit comprising: a rectifier circuit that rectifies a detection output; and variable impedance means that receives the output of the rectification circuit and varies the bandwidth of the bandpass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107181U JPS5819510U (en) | 1981-07-28 | 1981-07-28 | FM detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107181U JPS5819510U (en) | 1981-07-28 | 1981-07-28 | FM detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5819510U true JPS5819510U (en) | 1983-02-07 |
Family
ID=29905414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11107181U Pending JPS5819510U (en) | 1981-07-28 | 1981-07-28 | FM detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819510U (en) |
-
1981
- 1981-07-28 JP JP11107181U patent/JPS5819510U/en active Pending
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