JPS60174342U - local oscillation circuit - Google Patents
local oscillation circuitInfo
- Publication number
- JPS60174342U JPS60174342U JP6348784U JP6348784U JPS60174342U JP S60174342 U JPS60174342 U JP S60174342U JP 6348784 U JP6348784 U JP 6348784U JP 6348784 U JP6348784 U JP 6348784U JP S60174342 U JPS60174342 U JP S60174342U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- local oscillation
- active element
- voltage
- 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
- 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図は本考案に係る局部発振段の回路図、第２図は電
圧切換方式の従来回路図、及び第３図は端子切換式の従
来回路図である。
１０・・・・・・局部発振回路、１１・・・・・・可変
容量ダイオード、１２，１３・・・・・・同調コイル、
１４・・・・・・バンド切換用スイッチング素子、１５
・・・・・・発振用能動素子、１６・・・・・・制御回
路、３０・・・・・・制御用スイッチング素子、３１・
・・・・・抵抗。FIG. 1 is a circuit diagram of a local oscillation stage according to the present invention, FIG. 2 is a conventional circuit diagram of a voltage switching type, and FIG. 3 is a conventional circuit diagram of a terminal switching type. 10... Local oscillation circuit, 11... Variable capacitance diode, 12, 13... Tuning coil,
14...Switching element for band switching, 15
...Oscillation active element, 16...Control circuit, 30...Control switching element, 31.
·····resistance.
Claims (1)
、低域同調用コイル間に高周波的に並列接続したバンド
切換用スイッチング素子、及び発振用能動素子を具備し
、前記スイッチング素子をバンド切換端子から供給する
スイッチング電圧で０Ｎ−ＯＦＦさせ、前記発振用能動
素子を電源端子から供給する動作電圧で駆動する電子チ
ューナの局部発振回路において、 ・ 前記能動素子の動作点を決める制御品路を
前記能動素子と前記電源端子間に結合し、この制御回路
を電圧制御用スイッチング素子に抵抗を並列接続して構
成し、前記スイッチング電圧により応動させることを特
徴とする局部発振回路。[Claims for Utility Model Registration] A tuning variable capacitance diode, a high-frequency and low-frequency tuning coil, a switching element for band switching connected in parallel at high frequency between the low-frequency tuning coils, and an active element for oscillation. , in a local oscillation circuit of an electronic tuner that turns the switching element ON-OFF with a switching voltage supplied from a band switching terminal, and drives the oscillation active element with an operating voltage supplied from a power supply terminal, - an operating point of the active element; A local oscillation circuit characterized in that a control circuit for determining the voltage is coupled between the active element and the power supply terminal, and the control circuit is configured by connecting a resistor in parallel to a switching element for voltage control, and is responsive to the switching voltage. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6348784U JPS60174342U (en) | 1984-04-26 | 1984-04-26 | local oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6348784U JPS60174342U (en) | 1984-04-26 | 1984-04-26 | local oscillation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60174342U true JPS60174342U (en) | 1985-11-19 |
| JPH0215417Y2 JPH0215417Y2 (en) | 1990-04-25 |
Family
ID=30593680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6348784U Granted JPS60174342U (en) | 1984-04-26 | 1984-04-26 | local oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60174342U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525569U (en) * | 1978-08-08 | 1980-02-19 |
-
1984
- 1984-04-26 JP JP6348784U patent/JPS60174342U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525569U (en) * | 1978-08-08 | 1980-02-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0215417Y2 (en) | 1990-04-25 |
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