JPS5933348U - AM radio receiver - Google Patents
AM radio receiverInfo
- Publication number
- JPS5933348U JPS5933348U JP12947082U JP12947082U JPS5933348U JP S5933348 U JPS5933348 U JP S5933348U JP 12947082 U JP12947082 U JP 12947082U JP 12947082 U JP12947082 U JP 12947082U JP S5933348 U JPS5933348 U JP S5933348U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- resonant circuit
- bias current
- radio receiver
- tuning
- 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
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＡＭラジオ受信機における高周波同調増
幅回路の回路図、第２図は第１図に示す回路のインピー
ダンス特性の説明図、第３図は本考案の一実施例を示す
回路図、第４図は第３図に示す回路のインピーダンス特
性の説明図、第５図は中間周波妨害排除特性の説明図で
ある。
Ｑｌ・・・ＦＥＴ１Ｃｖ・・・可変容量、Ｌｏ、 Ｌ、
・・・コイル。Fig. 1 is a circuit diagram of a high frequency tuned amplifier circuit in a conventional AM radio receiver, Fig. 2 is an explanatory diagram of the impedance characteristics of the circuit shown in Fig. 1, and Fig. 3 is a circuit diagram showing an embodiment of the present invention. , FIG. 4 is an explanatory diagram of the impedance characteristic of the circuit shown in FIG. 3, and FIG. 5 is an explanatory diagram of the intermediate frequency interference rejection characteristic. Ql...FET1Cv...Variable capacitance, Lo, L,
···coil.
Claims (1)
らなる高周波増幅用トランジスタのソース又はエミッタ
とアースとの間に、可変容量とコイルとからなる同調用
直列共振回路を接続し、この共振回路と並列に、直流バ
イアス電流用コイルを接続レー同調帯域の下限付近にお
いて前記可変容量と前記直流バイアス電流用コイルとに
よって中間周波数に並列共振するように、前記直流バイ
アス電流用コイルのインダクタンス値を設定したＡＭラ
ジオ受信機。A tuning series resonant circuit consisting of a variable capacitor and a coil is connected between the source or emitter of a high-frequency amplification transistor consisting of a field effect transistor or a bipolar transistor and the earth, and a tuning series resonant circuit consisting of a variable capacitance and a coil is connected in parallel with the resonant circuit for direct current bias current. An AM radio receiver in which an inductance value of the DC bias current coil is set so that the variable capacitor and the DC bias current coil resonate in parallel at an intermediate frequency near the lower limit of a tuning band in which the coil is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12947082U JPS5933348U (en) | 1982-08-26 | 1982-08-26 | AM radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12947082U JPS5933348U (en) | 1982-08-26 | 1982-08-26 | AM radio receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5933348U true JPS5933348U (en) | 1984-03-01 |
| JPS636904Y2 JPS636904Y2 (en) | 1988-02-27 |
Family
ID=30293346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12947082U Granted JPS5933348U (en) | 1982-08-26 | 1982-08-26 | AM radio receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933348U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6247383U (en) * | 1985-01-11 | 1987-03-24 | ||
| JP2008510333A (en) * | 2004-08-13 | 2008-04-03 | ノキア コーポレイション | Single-chip LNA and VCO with similar resonant circuit topology and compensating for process variations using the same calibration signal |
-
1982
- 1982-08-26 JP JP12947082U patent/JPS5933348U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6247383U (en) * | 1985-01-11 | 1987-03-24 | ||
| JPH0226459Y2 (en) * | 1985-01-11 | 1990-07-18 | ||
| JP2008510333A (en) * | 2004-08-13 | 2008-04-03 | ノキア コーポレイション | Single-chip LNA and VCO with similar resonant circuit topology and compensating for process variations using the same calibration signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636904Y2 (en) | 1988-02-27 |
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