JPS63125438U - - Google Patents
Info
- Publication number
- JPS63125438U JPS63125438U JP1645787U JP1645787U JPS63125438U JP S63125438 U JPS63125438 U JP S63125438U JP 1645787 U JP1645787 U JP 1645787U JP 1645787 U JP1645787 U JP 1645787U JP S63125438 U JPS63125438 U JP S63125438U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- diode
- variable capacitance
- capacitance diode
- frequency
- 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
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図〜第３図はそれぞれ本考案による高周波
結合回路の実施例の構成図、第４図は従来及び本
考案の実施例における出力レベルを示す特性図、
第５図〜第７図は従来の高周波結合回路の構成図
である。
１…ＶＨＦ同調回路、４，５，２３…トランジ
スタ、４１，４３，４５…可変容量ダイオード、
４２，４４，４６…スイツチ、９，２７…Ｂ電源
、２１…ＶＨＦ局部発振回路。
1 to 3 are block diagrams of embodiments of the high frequency coupling circuit according to the present invention, and FIG. 4 is a characteristic diagram showing output levels in the conventional and embodiments of the present invention,
FIGS. 5 to 7 are configuration diagrams of conventional high frequency coupling circuits. 1...VHF tuning circuit, 4,5,23...transistor, 41,43,45...variable capacitance diode,
42, 44, 46...Switch, 9, 27...B power supply, 21...VHF local oscillation circuit.
Claims (1)
ら後段の回路に結合する高周波結合回路において
、上記前段の回路と上記後段の回路の間に直列に
可変容量ダイオードを設け、高域周波数信号を受
信する時は、上記可変容量ダイオードに順バイア
スの電圧を印加して、該ダイオードを導通させ、
低域周波数信号を受信する時は、上記可変容量ダ
イオードに逆バイアスの電圧を印加して、該ダイ
オードを容量として使うようにしたことを特徴と
する高周波結合回路。 In a high-frequency coupling circuit that couples high-frequency signals including high and low frequencies from a preceding circuit to a subsequent circuit, a variable capacitance diode is provided in series between the preceding circuit and the subsequent circuit to combine high-frequency signals. When receiving, apply a forward bias voltage to the variable capacitance diode to make the diode conductive,
A high frequency coupling circuit characterized in that when receiving a low frequency signal, a reverse bias voltage is applied to the variable capacitance diode to use the diode as a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1645787U JPS63125438U (en) | 1987-02-06 | 1987-02-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1645787U JPS63125438U (en) | 1987-02-06 | 1987-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63125438U true JPS63125438U (en) | 1988-08-16 |
Family
ID=30808330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1645787U Pending JPS63125438U (en) | 1987-02-06 | 1987-02-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63125438U (en) |
-
1987
- 1987-02-06 JP JP1645787U patent/JPS63125438U/ja active Pending
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