JPS5899944U - FM receiver - Google Patents
FM receiverInfo
- Publication number
- JPS5899944U JPS5899944U JP19689081U JP19689081U JPS5899944U JP S5899944 U JPS5899944 U JP S5899944U JP 19689081 U JP19689081 U JP 19689081U JP 19689081 U JP19689081 U JP 19689081U JP S5899944 U JPS5899944 U JP S5899944U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- output
- signal
- intermediate frequency
- controls
- 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.)
- Granted
Links
Landscapes
- Superheterodyne Receivers (AREA)
- Noise Elimination (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ａ、 ｂは中間周波段のフィルタの特性を説明
する図、第２図は本考案の一実施例を示すブロック図、
第３図ａ、 ｂは上記実施例の動作を示す周波数スペ
クトラムである。
１・・・・・・フロントエンド、１ａ・・・・・・ミク
サー、１ｂ・・・・・・局部発振回路、２・・・・・・
フィルタ、３・・・・・・中間周波増幅・検波回路、４
・・・・・・第１の電圧制御増幅器、５・・・・・・第
２の電圧制御増幅器、６・・・・・・バイパスフィルタ
、７・・・・・・整流回路、訃・・・・・マルチプレク
廿、ＶＣ・・・・・・電圧可変容量素子。FIGS. 1a and 1b are diagrams explaining the characteristics of the intermediate frequency stage filter, and FIG. 2 is a block diagram showing an embodiment of the present invention.
FIGS. 3a and 3b are frequency spectra showing the operation of the above embodiment. 1...Front end, 1a...Mixer, 1b...Local oscillation circuit, 2...
Filter, 3...Intermediate frequency amplification/detection circuit, 4
...First voltage control amplifier, 5 ... Second voltage control amplifier, 6 ... Bypass filter, 7 ... Rectifier circuit, ...Multiplex, VC...Voltage variable capacitance element.
Claims (1)
と混合して一定周波数の中間周波信号に変換するフロン
トエンドと、このフ・ロントエンドから出力する中間周
波信号をフィルタを介して与えられ増幅・検波する中間
周波増幅・検波回路と、この中間周波増幅・検波回路の
検波出力を与えられそのレベルに応じて上記局部発振回
路の発振周波数を制御し上記中間周波信号の周波数偏移
を圧縮する第１の電圧制御増幅器と、上記検波出力から
混信ビート成分を得るバイパスフィルタと、このバイパ
スフィルタの出力を整流した直流信号により上記第１の
電圧制御増幅器の増幅率を制御して中間周波信号の周波
数偏移の圧縮比を制御する整流回路と、上記検波出力を
与えられ上記直流信号に応じて低周波出力を一定に制御
する第２の電圧制御増幅器とを具備するＦＭ受信機。A front end that mixes FM radio waves with the oscillation frequency of a local oscillation circuit in a mixer and converts them into an intermediate frequency signal of a constant frequency, and an intermediate section that amplifies and detects the intermediate frequency signal output from this front end by applying it through a filter. a frequency amplification/detection circuit; and a first voltage that is given the detection output of the intermediate frequency amplification/detection circuit and controls the oscillation frequency of the local oscillation circuit according to its level to compress the frequency deviation of the intermediate frequency signal. a control amplifier, a bypass filter for obtaining an interference beat component from the detection output, and a DC signal obtained by rectifying the output of the bypass filter to control the amplification factor of the first voltage control amplifier to reduce the frequency deviation of the intermediate frequency signal. An FM receiver comprising: a rectifier circuit that controls a compression ratio; and a second voltage control amplifier that is supplied with the detected output and controls a low frequency output to a constant level in accordance with the DC signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19689081U JPS5899944U (en) | 1981-12-24 | 1981-12-24 | FM receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19689081U JPS5899944U (en) | 1981-12-24 | 1981-12-24 | FM receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5899944U true JPS5899944U (en) | 1983-07-07 |
| JPS6244600Y2 JPS6244600Y2 (en) | 1987-11-26 |
Family
ID=30110117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19689081U Granted JPS5899944U (en) | 1981-12-24 | 1981-12-24 | FM receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5899944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6172418A (en) * | 1984-09-17 | 1986-04-14 | Alps Electric Co Ltd | Receiver for satellite broadcast |
-
1981
- 1981-12-24 JP JP19689081U patent/JPS5899944U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6172418A (en) * | 1984-09-17 | 1986-04-14 | Alps Electric Co Ltd | Receiver for satellite broadcast |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244600Y2 (en) | 1987-11-26 |
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