JPS59159050U - UHF tuner local oscillation circuit - Google Patents
UHF tuner local oscillation circuitInfo
- Publication number
- JPS59159050U JPS59159050U JP5393383U JP5393383U JPS59159050U JP S59159050 U JPS59159050 U JP S59159050U JP 5393383 U JP5393383 U JP 5393383U JP 5393383 U JP5393383 U JP 5393383U JP S59159050 U JPS59159050 U JP S59159050U
- Authority
- JP
- Japan
- Prior art keywords
- local oscillation
- line
- uhf tuner
- oscillation circuit
- local
- 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)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (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ＵＨＦチューナに用いる要部回路図、
及び第２図は第１図の回路において従来及び本考案の温
度補償法を対比する温度ドリフト特性−である。
１・・・・・・局部発振段、２・・・・・・ＲＦプリセ
レクタ段、３・・・・・・ミキサ段、５・・・・・・ロ
ーカルステータ（線路）、６．１３・・・・・・可変容
量ダイオード、１２・・・・・・ＲＦステータ（線路）
、１７・・・・・・トラッキング補正用コンデンサ。Figure 1 is a circuit diagram of the main parts used in the UHF tuner of the present invention.
and FIG. 2 shows the temperature drift characteristics comparing the conventional temperature compensation method and the temperature compensation method of the present invention in the circuit of FIG. 1... Local oscillation stage, 2... RF preselector stage, 3... Mixer stage, 5... Local stator (line), 6.13. ...Variable capacitance diode, 12...RF stator (line)
, 17... Tracking correction capacitor.
Claims (1)
路を有する局部発振段共振回路とを具備するＵＨＦチュ
ーナにおいて、前記プリセレクター 段共振回路を前記
、ＲＦ線路に可変容量素子とトラッキング補正用コンデ
ンサの接続回路を直結して構成し、前記補正用コンデン
サを所定の温度係数に選定し、且つ前記ＲＦ線路と前記
ローカル線路間の容量を利用して前記局部発振段の高域
側温度ドリフトを縮減したことを特徴とするＯＨＦチュ
ーナの局部発振回路。In a UHF tuner comprising a pre-selector stage resonant circuit having an RF line and a local oscillation stage resonant circuit having a local line, the pre-selector stage resonant circuit is connected to the RF line, a variable capacitance element and a tracking correction capacitor are connected to the UHF tuner. The correction capacitor is selected to have a predetermined temperature coefficient, and the capacitance between the RF line and the local line is used to reduce the temperature drift on the high-frequency side of the local oscillation stage. The feature is the local oscillation circuit of the OHF tuner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5393383U JPS59159050U (en) | 1983-04-11 | 1983-04-11 | UHF tuner local oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5393383U JPS59159050U (en) | 1983-04-11 | 1983-04-11 | UHF tuner local oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59159050U true JPS59159050U (en) | 1984-10-25 |
Family
ID=30184285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5393383U Pending JPS59159050U (en) | 1983-04-11 | 1983-04-11 | UHF tuner local oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59159050U (en) |
-
1983
- 1983-04-11 JP JP5393383U patent/JPS59159050U/en active Pending
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