JPS615011U - local oscillation circuit - Google Patents
local oscillation circuitInfo
- Publication number
- JPS615011U JPS615011U JP8893284U JP8893284U JPS615011U JP S615011 U JPS615011 U JP S615011U JP 8893284 U JP8893284 U JP 8893284U JP 8893284 U JP8893284 U JP 8893284U JP S615011 U JPS615011 U JP S615011U
- Authority
- JP
- Japan
- Prior art keywords
- variable capacitance
- capacitance element
- oscillation
- circuit
- local oscillation
- 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
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (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
【図面の簡単な説明】
第１図は本考案に係る電子チューナ用局部発振回路の要
部高周波等価回路図、第２図は従来の発振回路の要部高
周波等価回路図、及び第３図は局部発振回路の出力端子
から導出されるローカル信号の周波数対出力レベルの特
性図である。
１１・・・第１の可変容量素子、１３・・・同調回路、
１４・・・第２の可変容量素子、１５・・・発振用トラ
ンジスタ、１６・・・第３の可変容量素子、１７・・・
コンデンサ、１８・・・帰還用直列回路、２１・・・バ
ツファ増幅回路、２２・・・出力端子。[Brief Description of the Drawings] Fig. 1 is a high-frequency equivalent circuit diagram of the main part of a local oscillation circuit for an electronic tuner according to the present invention, Fig. 2 is a high-frequency equivalent circuit diagram of the main part of a conventional oscillation circuit, and Fig. 3 is a high-frequency equivalent circuit diagram of the main part of a conventional oscillation circuit. FIG. 3 is a characteristic diagram of frequency versus output level of a local signal derived from an output terminal of a local oscillation circuit. 11... First variable capacitance element, 13... Tuning circuit,
14... Second variable capacitance element, 15... Oscillation transistor, 16... Third variable capacitance element, 17...
Capacitor, 18... Feedback series circuit, 21... Buffer amplifier circuit, 22... Output terminal.
Claims (1)
子を介して発振用トランジスタに結合すると共に前記ト
ランジスタのエミツターコレクタ間に第３の可変容量素
子とコンデンサの直列回路を介挿し、前記第３の可変容
量素子と前記コンデンサの接続点から導出される発振信
号をバツファ増幅回路を経て出力させ発振勢力を安定化
することを特徴とする広帯域受信用電子チューナの局部
発振回路。A tuning circuit including a first variable capacitance element is coupled to an oscillation transistor via a second variable capacitance element, and a series circuit of a third variable capacitance element and a capacitor is inserted between the emitter collector of the transistor, A local oscillation circuit for an electronic tuner for broadband reception, characterized in that an oscillation signal derived from a connection point between the third variable capacitance element and the capacitor is outputted through a buffer amplifier circuit to stabilize the oscillation force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8893284U JPS615011U (en) | 1984-06-14 | 1984-06-14 | local oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8893284U JPS615011U (en) | 1984-06-14 | 1984-06-14 | local oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS615011U true JPS615011U (en) | 1986-01-13 |
Family
ID=30642544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8893284U Pending JPS615011U (en) | 1984-06-14 | 1984-06-14 | local oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS615011U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372913U (en) * | 1986-10-31 | 1988-05-16 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5696504A (en) * | 1979-12-29 | 1981-08-04 | Mitsumi Electric Co Ltd | Local oscillation circuit in all channel tuner |
-
1984
- 1984-06-14 JP JP8893284U patent/JPS615011U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5696504A (en) * | 1979-12-29 | 1981-08-04 | Mitsumi Electric Co Ltd | Local oscillation circuit in all channel tuner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372913U (en) * | 1986-10-31 | 1988-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS615011U (en) | local oscillation circuit | |
| JPS60149258U (en) | tuner circuit | |
| JPS59108356U (en) | Prescaler input circuit | |
| JPS60119156U (en) | VHF tuner | |
| JPS59134935U (en) | AFT voltage superimposition circuit | |
| JPS58173915U (en) | piezoelectric oscillator | |
| JPS5837242U (en) | receiving circuit | |
| JPS599636U (en) | TV tuner for wideband reception | |
| JPS60145720U (en) | Digitally controlled piezoelectric oscillator circuit | |
| JPS59108355U (en) | Local oscillation signal injection device | |
| JPS6074335U (en) | AFC circuit of radio receiver | |
| JPS5991038U (en) | Tracking correction circuit for high frequency amplification stage | |
| JPS6123712U (en) | High frequency oscillation circuit | |
| JPS58149806U (en) | Audio intermediate frequency conversion circuit | |
| JPS58178727U (en) | trap circuit | |
| JPS58169744U (en) | VHF tuner input tuning circuit | |
| JPS59125114U (en) | audio output device | |
| JPS5946011U (en) | oscillation circuit | |
| JPS58125423U (en) | Channel selection device | |
| JPS58141637U (en) | RF switch circuit | |
| JPS6121143U (en) | Tuner local oscillation circuit | |
| JPS59143121U (en) | attenuation circuit | |
| JPS60112116U (en) | push pull amplifier circuit | |
| JPS5857142U (en) | integrated circuit device | |
| JPS58141607U (en) | Oscillation circuit in UHF tuner circuit |