JPS59134915U - FM detection circuit - Google Patents
FM detection circuitInfo
- Publication number
- JPS59134915U JPS59134915U JP2917983U JP2917983U JPS59134915U JP S59134915 U JPS59134915 U JP S59134915U JP 2917983 U JP2917983 U JP 2917983U JP 2917983 U JP2917983 U JP 2917983U JP S59134915 U JPS59134915 U JP S59134915U
- Authority
- JP
- Japan
- Prior art keywords
- detector
- resonant circuit
- detection circuit
- voltage
- change
- 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
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
図はこの考案のＦＭ検波回路の一実施例を示す回路図で
ある。゛
Ａ・・；・・・検波器、Ｂ・・・・・・演算増幅器、Ｒ
１−Ｒ３・・・・・・抵抗、Ｃ１〜ｃ３・・・・・・コ
ンデンサ、ＣＶ・・・・・・バリキャップ、Ｔ・・・・
・・検波コイル。The figure is a circuit diagram showing an embodiment of the FM detection circuit of this invention.゛A...;...Detector, B...Operation amplifier, R
1-R3...Resistor, C1-c3...Capacitor, CV...Varicap, T...
...Detection coil.
Claims (1)
構成された共振回路と、上記ＦＭ検波器から出力される
Ｓカーブ電圧と基準電圧とを入力してＦＭ検波器のドリ
フトによりＳカーブ電圧の変動分に相当する直流電圧を
上記容量可変素子に加えて上記共振回路から共振周波数
を変化させるとともに、その変化に対応した電圧を共振
回路からＦＭ検波器にフィードバックさせる演算増幅器
とよりなるＦＭ検波回路。An FM detector, a resonant circuit including a variable capacitance element and configured with a detection coil, and an S-curve voltage outputted from the FM detector and a reference voltage are input to detect fluctuations in the S-curve voltage due to the drift of the FM detector. An FM detection circuit comprising an operational amplifier that applies a direct current voltage corresponding to 100 volts to the variable capacitance element to change the resonant frequency from the resonant circuit, and feeds back a voltage corresponding to the change from the resonant circuit to the FM detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2917983U JPS59134915U (en) | 1983-02-28 | 1983-02-28 | FM detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2917983U JPS59134915U (en) | 1983-02-28 | 1983-02-28 | FM detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59134915U true JPS59134915U (en) | 1984-09-08 |
Family
ID=30160037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2917983U Pending JPS59134915U (en) | 1983-02-28 | 1983-02-28 | FM detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59134915U (en) |
-
1983
- 1983-02-28 JP JP2917983U patent/JPS59134915U/en active Pending
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