JPH01122636U - - Google Patents
Info
- Publication number
- JPH01122636U JPH01122636U JP1867688U JP1867688U JPH01122636U JP H01122636 U JPH01122636 U JP H01122636U JP 1867688 U JP1867688 U JP 1867688U JP 1867688 U JP1867688 U JP 1867688U JP H01122636 U JPH01122636 U JP H01122636U
- Authority
- JP
- Japan
- Prior art keywords
- inductance
- receiver
- value
- capacitance
- amplifier circuit
- 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
- 239000002131 composite material Substances 0.000 claims 2
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 3
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案の実施例を表わす図、第２図は
第１図の装置の感度特性を表わす図、第３図はア
ンテナ容量・ケーブル容量を説明するための図、
第４図は従来のＡＭ受信機の感度特性を表わす図
、第５図は低周波数域の感度低下を説明する図。
図において、１……コイル、２……ＦＥＴ、Ｘ
……アンテナ容量、Ｙ……ケーブル容量。
FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the sensitivity characteristics of the device shown in FIG. 1, and FIG. 3 is a diagram for explaining antenna capacity and cable capacity.
FIG. 4 is a diagram showing the sensitivity characteristics of a conventional AM receiver, and FIG. 5 is a diagram illustrating the decrease in sensitivity in the low frequency range. In the figure, 1...Coil, 2...FET,
...Antenna capacity, Y...Cable capacity.
Claims (1)
Ａであり、該アンテナ入力端は高周波増幅回路に
接続され、高周波増幅回路の入力に並列にインダ
クタンスＬＡのコイルが接続されたスーパーヘテ
ロダイン方式のＡＭ受信機において、 該インダクタンスＬＡの値は、容量ＣＡとイン
ダクタンスＬＡとの直列接続による合成インピー
ダンスの値に対するインダクタンスＬＡのインピ
ーダンスの値の比の値が、該ＡＭ受信機の受信最
低周波数において、他の受信周波数における値よ
りも大きく、且つ該合成インピーダンスが誘導性
を示す範囲に設定されることを特徴とするＡＭ受
信機。[Scope of claim for utility model registration] The capacitance on the antenna side seen from the antenna input end is C.
In a superheterodyne AM receiver in which the antenna input end is connected to a high frequency amplifier circuit and a coil with an inductance LA is connected in parallel to the input of the high frequency amplifier circuit, the value of the inductance LA is equal to the capacitance CA. The value of the ratio of the impedance value of the inductance LA to the value of the composite impedance resulting from the series connection of the AM receiver and the inductance LA is larger at the lowest reception frequency of the AM receiver than at other reception frequencies, and the composite impedance is An AM receiver characterized in that it is set in a range that exhibits inductive properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1867688U JPH01122636U (en) | 1988-02-17 | 1988-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1867688U JPH01122636U (en) | 1988-02-17 | 1988-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01122636U true JPH01122636U (en) | 1989-08-21 |
Family
ID=31233534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1867688U Pending JPH01122636U (en) | 1988-02-17 | 1988-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01122636U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144418A (en) * | 1984-08-08 | 1986-03-04 | 岡村製油株式会社 | Electrolyte for driving electrolytic condenser |
-
1988
- 1988-02-17 JP JP1867688U patent/JPH01122636U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144418A (en) * | 1984-08-08 | 1986-03-04 | 岡村製油株式会社 | Electrolyte for driving electrolytic condenser |
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