JPS5857141U - tuner mixing circuit - Google Patents
tuner mixing circuitInfo
- Publication number
- JPS5857141U JPS5857141U JP15264081U JP15264081U JPS5857141U JP S5857141 U JPS5857141 U JP S5857141U JP 15264081 U JP15264081 U JP 15264081U JP 15264081 U JP15264081 U JP 15264081U JP S5857141 U JPS5857141 U JP S5857141U
- Authority
- JP
- Japan
- Prior art keywords
- tuner
- stage
- mixer
- uhf
- mixing 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.)
- Granted
Links
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- 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図は従来のＵＨＦ−ＶＨＦチューナのブロック回路
図、第２図は第１図の回路に関するミキサ段の等価回路
図、第３図は本考案のチューナの混合回路を中心にして
示したブロック回路図、及び第４図は第３図の回路に関
する等価回路図である。
１０・・・・・・ミキサ段、１１・・・・・・トランジ
スタ（バッファ増幅器）、１２・・−ＦＥＴ（ミキサ素
子）、１３・・・ＵＨＦチューナ、１４・・・ＲＦ増幅
段、１５・・・局部発振段、１６〜１８・・・結合コン
デンサ。Figure 1 is a block circuit diagram of a conventional UHF-VHF tuner, Figure 2 is an equivalent circuit diagram of a mixer stage for the circuit in Figure 1, and Figure 3 is a block diagram mainly showing the mixer circuit of the tuner of the present invention. The circuit diagram and FIG. 4 are equivalent circuit diagrams for the circuit of FIG. 3. 10...Mixer stage, 11...Transistor (buffer amplifier), 12...-FET (mixer element), 13...UHF tuner, 14...RF amplification stage, 15... ...Local oscillation stage, 16-18...coupling capacitor.
Claims (1)
のミキサ段を利用してＵＨＦチューナの出力信号を増幅
させるＵＨＦ−ＶＨＦチューナにおいて、前記局部発振
段はバッファ増幅器を具備し、このバッファ増幅器を経
て前記ＵＨＦチューナの出力信号を前記ミキサ段に結合
してミキサ段損失を低減させたことを特徴とするチュー
ナの混合回路。In a UHF-VHF tuner that includes an RF amplification stage, a local oscillation stage, and a mixer stage, and uses the mixer stage to amplify the output signal of the UHF tuner, the local oscillation stage is equipped with a buffer amplifier, and the buffer amplifier A mixer circuit for a tuner, characterized in that the output signal of the UHF tuner is coupled to the mixer stage through the UHF tuner to reduce mixer stage loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264081U JPS5857141U (en) | 1981-10-13 | 1981-10-13 | tuner mixing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264081U JPS5857141U (en) | 1981-10-13 | 1981-10-13 | tuner mixing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5857141U true JPS5857141U (en) | 1983-04-18 |
| JPS6219008Y2 JPS6219008Y2 (en) | 1987-05-15 |
Family
ID=29945281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15264081U Granted JPS5857141U (en) | 1981-10-13 | 1981-10-13 | tuner mixing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857141U (en) |
-
1981
- 1981-10-13 JP JP15264081U patent/JPS5857141U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6219008Y2 (en) | 1987-05-15 |
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