JPS63156122U - - Google Patents
Info
- Publication number
- JPS63156122U JPS63156122U JP4841087U JP4841087U JPS63156122U JP S63156122 U JPS63156122 U JP S63156122U JP 4841087 U JP4841087 U JP 4841087U JP 4841087 U JP4841087 U JP 4841087U JP S63156122 U JPS63156122 U JP S63156122U
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- frequency
- local oscillation
- circuit
- voltage
- 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
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
Description
第１図は本考案を実施した選局装置の回路図で
あり、第２図はそのブロツク回路図、第３図及び
第４図は第１図における構成部分の特性図である
。第５図は従来例の回路図である。
１……アンテナ入力同調回路、２……混合回路
、３……局部発振回路、４……周波数・電圧変換
回路、Ｄ１……可変容量ダイオード。
FIG. 1 is a circuit diagram of a channel selection device embodying the present invention, FIG. 2 is a block circuit diagram thereof, and FIGS. 3 and 4 are characteristic diagrams of the constituent parts in FIG. 1. FIG. 5 is a circuit diagram of a conventional example. 1...Antenna input tuning circuit, 2...Mixing circuit, 3...Local oscillation circuit, 4...Frequency/voltage conversion circuit, D1 ...Variable capacitance diode.
Claims (1)
ける選局装置において、混合回路と、選局操作手
段と、該選局操作手段によつて周波数が可変され
る局部発振回路と、該局部発振回路の出力を受け
て局部発振信号の周波数に応じた直流電圧を発生
する手段と、電圧可変容量素子を有し前記直流電
圧によつて同調周波数が制御される受信周波数同
調回路とからなる選局装置。 A tuning device for a superheterodyne radio receiver includes a mixing circuit, a tuning operating means, a local oscillation circuit whose frequency is varied by the tuning operating means, and a channel receiving the output of the local oscillation circuit. A tuning device comprising means for generating a DC voltage according to the frequency of a local oscillation signal, and a reception frequency tuning circuit having a voltage variable capacitance element and having a tuning frequency controlled by the DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4841087U JPS63156122U (en) | 1987-03-31 | 1987-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4841087U JPS63156122U (en) | 1987-03-31 | 1987-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63156122U true JPS63156122U (en) | 1988-10-13 |
Family
ID=30869912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4841087U Pending JPS63156122U (en) | 1987-03-31 | 1987-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63156122U (en) |
-
1987
- 1987-03-31 JP JP4841087U patent/JPS63156122U/ja active Pending
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