JPS6077142U - Local injection circuit of broadband tuner - Google Patents
Local injection circuit of broadband tunerInfo
- Publication number
- JPS6077142U JPS6077142U JP17065783U JP17065783U JPS6077142U JP S6077142 U JPS6077142 U JP S6077142U JP 17065783 U JP17065783 U JP 17065783U JP 17065783 U JP17065783 U JP 17065783U JP S6077142 U JPS6077142 U JP S6077142U
- Authority
- JP
- Japan
- Prior art keywords
- stage
- local
- injection circuit
- local injection
- mixing
- 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
Landscapes
- Superheterodyne Receivers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案の前提であるローカル注入回路を用いる
チューナのブロック図、及び第２図は本考案に係る広帯
域チューナのローカル注入回路図である。
１・・・・・−ＲＦ増幅段、２・・・・・・局部発振段
、３・曲・ローカル増幅段、４・・・・・・混合段、５
・・・・・・前段トランジスタ、６・・・・・・後段ト
ランジスタ、７・・・・・・デュアルゲートＦＥＴ０FIG. 1 is a block diagram of a tuner using a local injection circuit, which is the premise of the present invention, and FIG. 2 is a local injection circuit diagram of a broadband tuner according to the present invention. 1...-RF amplification stage, 2...Local oscillation stage, 3. Song/local amplification stage, 4...Mixing stage, 5
...Front stage transistor, 6...Late stage transistor, 7...Dual gate FET0
Claims (1)
カル信号をデュアルゲートＦＥＴを有する混合段に注入
する広帯域用チューナにおいて、前記局部発振段と前記
混合段間に前段がコレクタ接地方式、後段がエミッタ接
地方式の直列接続から成るローカル増幅段を介在させ、
前段トランジスタで入力インピーダンスを高めて前記局
部発振段の負荷を規制すると共に後段トランジスタで前
記混合段のＦＥＴに所要の入力レベルにローカル信号を
増幅することを特徴とする広帯域チューナのローカル注
入回路。In a wideband tuner that injects an RF input signal from an RF amplification stage and a local signal from a local oscillation stage into a mixing stage having a dual gate FET, the former stage is a collector-grounded type and the latter stage is a collector-grounded type between the local oscillation stage and the mixing stage. A local amplification stage consisting of a series connection with a grounded emitter is interposed,
A local injection circuit for a wideband tuner, characterized in that a front-stage transistor increases input impedance to regulate the load on the local oscillation stage, and a rear-stage transistor amplifies a local signal to a required input level to an FET in the mixing stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17065783U JPS6077142U (en) | 1983-10-31 | 1983-10-31 | Local injection circuit of broadband tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17065783U JPS6077142U (en) | 1983-10-31 | 1983-10-31 | Local injection circuit of broadband tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6077142U true JPS6077142U (en) | 1985-05-29 |
Family
ID=30372492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17065783U Pending JPS6077142U (en) | 1983-10-31 | 1983-10-31 | Local injection circuit of broadband tuner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6077142U (en) |
-
1983
- 1983-10-31 JP JP17065783U patent/JPS6077142U/en active Pending
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