JPS58166137U - receiving device - Google Patents
receiving deviceInfo
- Publication number
- JPS58166137U JPS58166137U JP6335382U JP6335382U JPS58166137U JP S58166137 U JPS58166137 U JP S58166137U JP 6335382 U JP6335382 U JP 6335382U JP 6335382 U JP6335382 U JP 6335382U JP S58166137 U JPS58166137 U JP S58166137U
- Authority
- JP
- Japan
- Prior art keywords
- receiving device
- changing
- variable capacitance
- change
- capacitance diode
- 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 3
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (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図は可変容量ダイオードの逆バイアス電圧対静電容
量特性の一例を示す図、第２図はこの考案に係る受信装
置の一実施例の要部を示す回路図、第３図は第２図の回
路の動作を説明するために用いた図、第４図はこの考案
の他の実施例を示す回路図である。
、１１・・・・・・ＦＭ検波部、１２・・・・・・低周
波増幅器、１３・・・・・・減算器、１４・・・・・・
局部発振器、■。・・・・・・基準電源、ＶＣ・・・・
・・可変容量コンデンサ、Ｌ・・・・・・コイル、Ｄｖ
・・・・・・可変容量ダイオード、Ｒ１乃至Ｒ３・・・
・・・抵抗、Ｃ１乃至Ｃ１・・・・・・コンデンサ、Ｄ
ｌ・・・・・・ダイオード。Fig. 1 is a diagram showing an example of the reverse bias voltage versus capacitance characteristics of a variable capacitance diode, Fig. 2 is a circuit diagram showing the main part of an embodiment of the receiving device according to this invention, and Fig. 3 is a diagram showing an example of the reverse bias voltage versus capacitance characteristic of a variable capacitance diode. FIG. 4, which is a diagram used to explain the operation of the circuit shown in the figure, is a circuit diagram showing another embodiment of this invention. , 11...FM detection unit, 12...Low frequency amplifier, 13...Subtractor, 14...
Local oscillator,■. ...Reference power supply, VC...
...Variable capacitor, L...Coil, Dv
・・・・・・Variable capacitance diode, R1 to R3...
...Resistance, C1 to C1...Capacitor, D
l...Diode.
Claims (1)
じ可変容量ダイオードの逆バイアスを変化させ、局部発
振器の発振周波数を変化させることにより、ＦＭ変調波
に対する同調周波数のずれを補正するＡＦＣ回路を備え
た受信装置において、前記直流成分のレベル変化に対し
て前記可変容量ダイオードの容量変化が略比例するよう
に補償する補償回路を具備してなることを特徴とする受
信装置。Equipped with an AFC circuit that corrects the deviation of the tuning frequency with respect to the FM modulation wave by changing the reverse bias of the variable capacitance diode according to the DC component level extracted from the detection signal of the FM detection section and changing the oscillation frequency of the local oscillator. 1. A receiving device comprising: a compensation circuit that compensates for a change in the capacitance of the variable capacitance diode to be substantially proportional to a change in the level of the DC component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6335382U JPS58166137U (en) | 1982-04-30 | 1982-04-30 | receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6335382U JPS58166137U (en) | 1982-04-30 | 1982-04-30 | receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58166137U true JPS58166137U (en) | 1983-11-05 |
Family
ID=30073458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6335382U Pending JPS58166137U (en) | 1982-04-30 | 1982-04-30 | receiving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166137U (en) |
-
1982
- 1982-04-30 JP JP6335382U patent/JPS58166137U/en active Pending
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