JPS6428017U - - Google Patents
Info
- Publication number
- JPS6428017U JPS6428017U JP12281587U JP12281587U JPS6428017U JP S6428017 U JPS6428017 U JP S6428017U JP 12281587 U JP12281587 U JP 12281587U JP 12281587 U JP12281587 U JP 12281587U JP S6428017 U JPS6428017 U JP S6428017U
- Authority
- JP
- Japan
- Prior art keywords
- bandpass filters
- variable capacitance
- differential amplifier
- capacitance diode
- amplifier
- 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
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例のリミツタアンプの
同調周波数補償回路のブロツク図、第２図は一実
施例の動作を説明するための図、第３図は従来の
ＦＭ無線機の要部ブロツク図である。
図において、１はアンテナ、２は受信部、３は
リミツタアンプ、３−１はトランジスタ、４は同
調回路、４−１はコンデンサ、４−２はコイル、
５はデイスクリ回路、６は低周波増幅部、７はス
ピーカ、８は第１のバンドパスフイルタ（第１の
ＢＰＦ）、９は第２のＢＰＦ、１０は差動増幅器
、１１は可変容量ダイオード、１２，１３はダイ
オード（整流用）を示している。
Fig. 1 is a block diagram of a tuning frequency compensation circuit of a limiter amplifier according to an embodiment of the present invention, Fig. 2 is a diagram for explaining the operation of an embodiment, and Fig. 3 is a block diagram of the main parts of a conventional FM radio. It is a diagram. In the figure, 1 is an antenna, 2 is a receiver, 3 is a limiter amplifier, 3-1 is a transistor, 4 is a tuning circuit, 4-1 is a capacitor, 4-2 is a coil,
5 is a disk drive circuit, 6 is a low frequency amplification section, 7 is a speaker, 8 is a first band pass filter (first BPF), 9 is a second BPF, 10 is a differential amplifier, 11 is a variable capacitance diode, 12 and 13 indicate diodes (for rectification).
Claims (1)
ミツタアンプ３に、前記同調回路の通過帯域の両
端域信号をそれぞれ取出す第１および第２のバン
ドパスフイルタ８，９と、前記取出された両端域
信号のレベル差値を検出する差動増幅器１０と、
前記検出したレベル差値に応じた容量を発生する
可変容量ダイオード１１とを設け、前記可変容量
ダイオードの一端に前記リミツタアンプ３の出力
端および第１、第２のバンドパスフイルタの入力
端と、該第１および第２のバンドパスフイルタの
出力端に前記差動増幅器の入力端と、該差動増幅
器の出力端に前記可変容量ダイオードの他の一端
とをそれぞれ接続したことを特徴とするリミツタ
アンプの同調周波数補償回路。 A limiter amplifier 3 that limits the amplitude of the passband signal of the tuning circuit 4 includes first and second bandpass filters 8 and 9 that take out signals at both ends of the passband of the tuning circuit, respectively, and the taken out both endband signals. a differential amplifier 10 that detects a level difference value;
A variable capacitance diode 11 that generates a capacitance according to the detected level difference value is provided, and one end of the variable capacitance diode is connected to the output terminal of the limiter amplifier 3 and the input terminals of the first and second bandpass filters. A limiter amplifier characterized in that an input end of the differential amplifier is connected to the output ends of the first and second bandpass filters, and another end of the variable capacitance diode is connected to the output end of the differential amplifier. Tuned frequency compensation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12281587U JPS6428017U (en) | 1987-08-10 | 1987-08-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12281587U JPS6428017U (en) | 1987-08-10 | 1987-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6428017U true JPS6428017U (en) | 1989-02-17 |
Family
ID=31371095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12281587U Pending JPS6428017U (en) | 1987-08-10 | 1987-08-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6428017U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7559563B2 (en) | 2005-06-27 | 2009-07-14 | Toyota Jidosha Kabushiki Kaisha | Suspension apparatus for vehicle |
| US7813853B2 (en) | 2005-12-26 | 2010-10-12 | Toyota Jidosha Kabushiki Kaisha | Damping force control apparatus for vehicle |
-
1987
- 1987-08-10 JP JP12281587U patent/JPS6428017U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7559563B2 (en) | 2005-06-27 | 2009-07-14 | Toyota Jidosha Kabushiki Kaisha | Suspension apparatus for vehicle |
| US7813853B2 (en) | 2005-12-26 | 2010-10-12 | Toyota Jidosha Kabushiki Kaisha | Damping force control apparatus for vehicle |
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