JPS59152837U - Practical sensitivity/frequency characteristic improvement circuit for AM radio receivers - Google Patents
Practical sensitivity/frequency characteristic improvement circuit for AM radio receiversInfo
- Publication number
- JPS59152837U JPS59152837U JP4634883U JP4634883U JPS59152837U JP S59152837 U JPS59152837 U JP S59152837U JP 4634883 U JP4634883 U JP 4634883U JP 4634883 U JP4634883 U JP 4634883U JP S59152837 U JPS59152837 U JP S59152837U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- emphasizing
- output
- agc
- frequency characteristic
- 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
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案の実施例を示すもので、第１図は本考案の実
用感度周波数特性改善回路図、第２図はアンテナ入力と
ＡＧＣ電圧との関係図、第３図は検波出力周波数特性図
である。
５・・・検波回路、６・・・出力回路、７・・・ＡＭ出
力回路、８・・・ＡＧＣ回路、１０・・・実用感度周波
数特性改善回路、１１・・・高域成分強調回路、１２・
・・スイッチング回路。The figures show an embodiment of the present invention. Figure 1 is a circuit diagram for improving the practical sensitivity frequency characteristics of the present invention, Figure 2 is a diagram of the relationship between antenna input and AGC voltage, and Figure 3 is a diagram of the detection output frequency characteristics. It is. 5... Detection circuit, 6... Output circuit, 7... AM output circuit, 8... AGC circuit, 10... Practical sensitivity frequency characteristic improvement circuit, 11... High frequency component emphasis circuit, 12・
...Switching circuit.
Claims (1)
れ、アンテナ入力により直流電圧が変化するＡＧＣ回路
と、該ＡＧＣ回路の出力に応じ作動されるスイッチング
回路と、検波回路出力側とＡＭ出力装置との間に直列に
設けられ周波数高域成分を強調する高域成分強調回路と
よりなり、スイッチング回路の一方の端は上記高域成分
強調回路の出力側に、他端は接地されており、該スイッ
チング回路はＡＧＣ電圧が設定値以下のときは閉路され
強調された高域成分を減衰せしめ、ＡＧＣ電圧が設定値
以上のときは開路され、高域成分を強調してＡＭ出力回
路に印加することを特徴とするＡＭラジオ受信機におけ
る実用感度・周波数特性改善回路。In an AM radio receiver, an AGC circuit that is provided on the output side of a detection circuit and whose DC voltage changes depending on the antenna input, a switching circuit that is activated according to the output of the AGC circuit, and an output side of the detection circuit and an AM output device. A high frequency component emphasizing circuit is provided in series between the switching circuits and emphasizing high frequency components, one end of the switching circuit is connected to the output side of the high frequency component emphasizing circuit, and the other end is grounded. When the AGC voltage is below the set value, the switching circuit is closed to attenuate the emphasized high-frequency components, and when the AGC voltage is above the set value, it is opened, emphasizing the high-frequency components and applying them to the AM output circuit. A circuit for improving practical sensitivity and frequency characteristics in an AM radio receiver, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4634883U JPS59152837U (en) | 1983-03-30 | 1983-03-30 | Practical sensitivity/frequency characteristic improvement circuit for AM radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4634883U JPS59152837U (en) | 1983-03-30 | 1983-03-30 | Practical sensitivity/frequency characteristic improvement circuit for AM radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59152837U true JPS59152837U (en) | 1984-10-13 |
Family
ID=30176903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4634883U Pending JPS59152837U (en) | 1983-03-30 | 1983-03-30 | Practical sensitivity/frequency characteristic improvement circuit for AM radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199138A (en) * | 1992-02-10 | 1993-08-06 | Chiyuunaa Kk | Fm radio receiver |
-
1983
- 1983-03-30 JP JP4634883U patent/JPS59152837U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199138A (en) * | 1992-02-10 | 1993-08-06 | Chiyuunaa Kk | Fm radio receiver |
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