JPH0365333U - - Google Patents
Info
- Publication number
- JPH0365333U JPH0365333U JP12727989U JP12727989U JPH0365333U JP H0365333 U JPH0365333 U JP H0365333U JP 12727989 U JP12727989 U JP 12727989U JP 12727989 U JP12727989 U JP 12727989U JP H0365333 U JPH0365333 U JP H0365333U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- mixer
- intermediate frequency
- saw filter
- 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 2
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図は同実施例において用いるＳＡＷ
フイルタ１２の特性を示す特性図、第３図は同実
施例における最終的出力の周波数特性を示す特性
図、第４図は従来のダブルスーパーヘテロダイン
方式チユーナの構成を示すブロツク図、第５図は
従来回路において用いられるバンドパスフイルタ
５の特性を示す特性図、第６図は従来回路におい
て用いられるＳＡＷフイルタの特性を示す特性図
である。
３……第１混合器、７……第２混合器、１２…
…ＳＡＷフイルタ、１３……ノツチフイルタ（ト
ラツプ）。
Fig. 1 is a block diagram showing the configuration of an embodiment of this invention, and Fig. 2 is a SAW used in the embodiment.
FIG. 3 is a characteristic diagram showing the frequency characteristics of the final output in the same embodiment. FIG. 4 is a block diagram showing the configuration of a conventional double superheterodyne tuner. FIG. 5 is a characteristic diagram showing the characteristics of the filter 12. FIG. 6 is a characteristic diagram showing the characteristics of the bandpass filter 5 used in the conventional circuit. FIG. 6 is a characteristic diagram showing the characteristics of the SAW filter used in the conventional circuit. 3...first mixer, 7...second mixer, 12...
...SAW filter, 13...notch filter (trap).
Claims (1)
とを入力して、受信信号の周波数よりも高い周波
数の第１中間周波数信号を出力する第１混合器と
、この第１混合器の後段に設けられ前記第１中間
周波信号を通過させるＳＡＷフイルタと、前記第
１中間周波信号と第２局部発振信号とを入力して
、前記受信信号の周波数よりも低い周波数の第２
中間周波信号を出力する第２混合器と、この第２
混合器の後段に設けられ隣接チヤンネルの映像信
号を減衰させるトラツプとを具備することを特徴
とするダブルスーパーヘテロダイン方式チユーナ
。 (2) 請求項(1)に記載のＳＡＷフイルタに代えて
誘電体共振器を用いたことを特徴とするダブルス
ーパーヘテロダイン方式チユーナ。[Claims for Utility Model Registration] (1) A first mixer that inputs a received signal and a first local oscillation signal with a variable frequency and outputs a first intermediate frequency signal having a frequency higher than the frequency of the received signal; , a SAW filter that is provided after the first mixer and passes the first intermediate frequency signal; and a SAW filter that inputs the first intermediate frequency signal and the second local oscillation signal, and is configured to generate a signal having a frequency lower than that of the received signal. second frequency
a second mixer outputting an intermediate frequency signal;
1. A double superheterodyne tuner, comprising a trap provided after a mixer to attenuate a video signal of an adjacent channel. (2) A double superheterodyne tuner characterized in that a dielectric resonator is used in place of the SAW filter according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12727989U JPH0365333U (en) | 1989-10-31 | 1989-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12727989U JPH0365333U (en) | 1989-10-31 | 1989-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365333U true JPH0365333U (en) | 1991-06-25 |
Family
ID=31675041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12727989U Pending JPH0365333U (en) | 1989-10-31 | 1989-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200000208U (en) * | 2018-07-17 | 2020-01-29 | 타케비시(따리엔) 인더스트리얼 컴퍼니 리미티드 | Zipper and its packing bag having a vent hole |
-
1989
- 1989-10-31 JP JP12727989U patent/JPH0365333U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200000208U (en) * | 2018-07-17 | 2020-01-29 | 타케비시(따리엔) 인더스트리얼 컴퍼니 리미티드 | Zipper and its packing bag having a vent hole |
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