JPS6226933U - - Google Patents
Info
- Publication number
- JPS6226933U JPS6226933U JP11733785U JP11733785U JPS6226933U JP S6226933 U JPS6226933 U JP S6226933U JP 11733785 U JP11733785 U JP 11733785U JP 11733785 U JP11733785 U JP 11733785U JP S6226933 U JPS6226933 U JP S6226933U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- local oscillation
- group
- tuning
- variable capacitor
- 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 5
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の多バンド短波放送受信機のブ
ロツク図、第２図は本考案に用いた同調回路の原
理図である。
１……高周波増幅回路、３……アンテナ同調回
路、５……第１ハンド切換スイツチ、１０ａ，１
０ｂ……コンデンサー群、１１……可変コンデン
サー、１４……混合回路、１５……局部発振回路
、１６……発振同調回路、１７……コイル、１８
……第２バンド切換スイツチ、２３ａ，２３ｂ…
…コンデンサー群、２４……可変コンデンサー。
FIG. 1 is a block diagram of the multi-band shortwave broadcasting receiver of the present invention, and FIG. 2 is a principle diagram of the tuning circuit used in the present invention. DESCRIPTION OF SYMBOLS 1... High frequency amplification circuit, 3 ... Antenna tuning circuit, 5... First hand changeover switch, 10a, 1
0b... Capacitor group, 11... Variable capacitor, 14... Mixing circuit, 15... Local oscillation circuit, 16 ... Oscillation tuning circuit, 17... Coil, 18
...Second band changeover switch, 23a, 23b...
...Capacitor group, 24...Variable capacitor.
Claims (1)
混合回路に加え、該混合回路で局部発振回路より
得られる局部発振信号をと混合し中間周波信号に
変換するものにおいて、前記局部発振回路の同調
回路を共通に用いられるコイル及び選局用の可変
コンデンサーと、各バンドに対応して形成された
コンデンサー群とにより形成し、バンド切換スイ
ツチにて受信される短波放送信号に応じてコンデ
ンサー群を選択し、該コンデンサー群を前記コイ
ルと可変コンデンサーとの間に接続されるように
構成した多バンド短波放送受信機。 A received shortwave broadcast signal is amplified by a high frequency circuit and added to a mixing circuit, and the mixing circuit mixes a local oscillation signal obtained from a local oscillation circuit and converts it into an intermediate frequency signal, wherein a tuning circuit for the local oscillation circuit. is formed by a commonly used coil and a variable capacitor for tuning, and a group of capacitors formed corresponding to each band, and the group of capacitors is selected according to the shortwave broadcast signal received by the band selection switch. , a multiband shortwave broadcast receiver configured such that the capacitor group is connected between the coil and the variable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11733785U JPS6226933U (en) | 1985-07-31 | 1985-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11733785U JPS6226933U (en) | 1985-07-31 | 1985-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6226933U true JPS6226933U (en) | 1987-02-18 |
Family
ID=31002752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11733785U Pending JPS6226933U (en) | 1985-07-31 | 1985-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62120272U (en) * | 1986-01-23 | 1987-07-30 |
-
1985
- 1985-07-31 JP JP11733785U patent/JPS6226933U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62120272U (en) * | 1986-01-23 | 1987-07-30 | ||
| JPH044372Y2 (en) * | 1986-01-23 | 1992-02-07 |
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