JPS61158746U - - Google Patents
Info
- Publication number
- JPS61158746U JPS61158746U JP4266085U JP4266085U JPS61158746U JP S61158746 U JPS61158746 U JP S61158746U JP 4266085 U JP4266085 U JP 4266085U JP 4266085 U JP4266085 U JP 4266085U JP S61158746 U JPS61158746 U JP S61158746U
- Authority
- JP
- Japan
- Prior art keywords
- series
- capacitor
- oscillation
- oscillation coil
- band
- 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
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例における局部発振器
の回路図、第２図は従来の局部発振器の回路図で
ある。
１……可変コンデンサ、２，５，８……付加コ
ンデンサ、３……第１のパデイングコンデンサ、
４……第１の発振コイル、６……第１のスイツチ
ングトランジスタ、７……第２の発振コイル、９
……第２のパデイングコンデンサ、１０……第２
のスイツチングトランジスタ、１１，１２，１３
，１５，１８，１９……抵抗。
FIG. 1 is a circuit diagram of a local oscillator according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional local oscillator. 1... variable capacitor, 2, 5, 8... additional capacitor, 3... first padding capacitor,
4...First oscillation coil, 6...First switching transistor, 7... Second oscillation coil, 9
...Second padding capacitor, 10...Second
switching transistors, 11, 12, 13
, 15, 18, 19...resistance.
Claims (1)
に第１の発振コイルと第１のパデイングコンデン
サと第１のバンドの時に導通してアースする第１
のスイツチング素子を設け、さらに上記第１の発
振コイルに直列に第２の発振コイルと第２のパデ
イスグコンデンサと第２のバンドの時に導通して
アースする第２のスイツチング素子を設け、上記
第１と第２の発振コイルの２次巻線どうしを直列
に接続して発振トランジスタに接続し、少なくと
も第１の発振コイルの両端もしくはこの２次巻線
の両端に抵抗を備えた局部発振器。 a variable capacitor, a first oscillation coil connected in series to the variable capacitor, a first padding capacitor, and a first capacitor that is electrically connected and grounded during the first band.
A switching element is provided in series with the first oscillation coil, and a second switching element is provided in series with the second oscillation coil and the second padding capacitor, which conducts to the ground during the second band. A local oscillator in which the secondary windings of the first and second oscillation coils are connected in series to an oscillation transistor, and a resistor is provided at least at both ends of the first oscillation coil or at both ends of the secondary winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4266085U JPS61158746U (en) | 1985-03-25 | 1985-03-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4266085U JPS61158746U (en) | 1985-03-25 | 1985-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61158746U true JPS61158746U (en) | 1986-10-01 |
Family
ID=30553622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4266085U Pending JPS61158746U (en) | 1985-03-25 | 1985-03-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61158746U (en) |
-
1985
- 1985-03-25 JP JP4266085U patent/JPS61158746U/ja active Pending