JPS6157725U - - Google Patents
Info
- Publication number
- JPS6157725U JPS6157725U JP14250484U JP14250484U JPS6157725U JP S6157725 U JPS6157725 U JP S6157725U JP 14250484 U JP14250484 U JP 14250484U JP 14250484 U JP14250484 U JP 14250484U JP S6157725 U JPS6157725 U JP S6157725U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- subtracting
- channel selection
- selection device
- amplifier circuit
- 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 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は従来の選局装置を示すブロツク図、第
２図はこの考案の一実施例の選局装置を示すブロ
ツク図、第３図はこの考案の動作を説明する線図
である。
１…フロントエンド、２…ＩＦ増幅回路、３…
選局回路、４…メモリー、５…レベル検出回路、
６…表示回路。
FIG. 1 is a block diagram showing a conventional channel selection device, FIG. 2 is a block diagram showing a channel selection device according to an embodiment of this invention, and FIG. 3 is a diagram illustrating the operation of this invention. 1...Front end, 2...IF amplifier circuit, 3...
Tuning circuit, 4...memory, 5...level detection circuit,
6...Display circuit.
Claims (1)
Ｆ増幅回路の出力レベルを検出する手段と、この
出力レベルを記憶する手段と、アンテナ段の同調
周波数に対して２倍の中間周波数を加算および減
算する手段と、この場合のＩＦ増幅回路の出力レ
ベルを比較する手段と、この比較の結果でイメー
ジ周波数による受信であることを表示する手段と
を備えた選局装置。 (2) 局部発振周波数に対して２倍の中間周波数
を加算および減算する手段を設け、イメージ周波
数による受信表示の手段を設けない実用新案登録
請求の範囲第１項記載の選局装置。[Claims for utility model registration] (1) In a superheterodyne receiver, I
means for detecting the output level of the F amplifier circuit, means for storing this output level, means for adding and subtracting an intermediate frequency twice the tuning frequency of the antenna stage, and an output of the IF amplifier circuit in this case. A channel selection device comprising means for comparing levels and means for displaying the result of the comparison as reception based on the image frequency. (2) The channel selection device according to claim 1, which is provided with means for adding and subtracting an intermediate frequency twice the local oscillation frequency, and does not include means for displaying reception based on an image frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14250484U JPS6157725U (en) | 1984-09-19 | 1984-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14250484U JPS6157725U (en) | 1984-09-19 | 1984-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6157725U true JPS6157725U (en) | 1986-04-18 |
Family
ID=30700828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14250484U Pending JPS6157725U (en) | 1984-09-19 | 1984-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6157725U (en) |
-
1984
- 1984-09-19 JP JP14250484U patent/JPS6157725U/ja active Pending
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