JPS58125424U - Tuner circuit for monitor TV - Google Patents
Tuner circuit for monitor TVInfo
- Publication number
- JPS58125424U JPS58125424U JP2228282U JP2228282U JPS58125424U JP S58125424 U JPS58125424 U JP S58125424U JP 2228282 U JP2228282 U JP 2228282U JP 2228282 U JP2228282 U JP 2228282U JP S58125424 U JPS58125424 U JP S58125424U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- monitor
- channel selection
- tuner
- resonant
- 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
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案によるモニタテレビ用チューナ回路の一
実施例を示す電気回路図、第２図は低い 一方の
チャンネル受信時の等価回路図、第３図は高い方のチャ
ンネル受信時の等価回路図である。
１・・・ＲＦ信号入力端子、２・・・入力回路、３・・
・高周波増幅回路、−４・・・同調回路、５・・・混合
回路、６・・・局部発振回路、７・・・中間周波信号出
力端子。Fig. 1 is an electric circuit diagram showing an embodiment of the tuner circuit for monitor television according to the present invention, Fig. 2 is an equivalent circuit diagram when receiving the lower channel, and Fig. 3 is an equivalent circuit diagram when receiving the higher channel. It is a diagram. 1...RF signal input terminal, 2...Input circuit, 3...
- High frequency amplifier circuit, -4... Tuning circuit, 5... Mixing circuit, 6... Local oscillation circuit, 7... Intermediate frequency signal output terminal.
Claims (2)
のＲＦ入力信号を、チャンネル選局用入力回路、高周波
増幅回路、同調回路、局部発振回路を有する混合回路を
経て中間周波信号とするチューナ回路において、前記入
力回路、同調回路、局部発振回路は、それぞれ共振回路
と、この共振回路のりアクタンスを高低いずれかのチャ
ンネル選択信号でオン、オフして可変するスイッチング
ダイオードとを具備してなることを特徴とするモニタテ
レビ用チューナ回路。(1) In a tuner circuit that converts RF input signals of two adjacent channels from video equipment into an intermediate frequency signal through a mixing circuit having a channel selection input circuit, a high frequency amplification circuit, a tuning circuit, and a local oscillation circuit, The input circuit, the tuning circuit, and the local oscillation circuit each include a resonant circuit and a switching diode that changes the actance of the resonant circuit by turning it on or off in response to a high or low channel selection signal. Tuner circuit for monitor TV.
、スイッチングダイオードは、高い方のチャンネル選択
信号でオンして共振回路の１部のコイルをアースに接続
してリアクタンスを小すくし゛て共振周波数を高めるよ
うにした実用新案登゛ 録請求の範囲第１項記載のモ
ニタテレビ用チューナ回路。(2) The resonant circuit is made up of multiple coils and capacitors.The switching diode is turned on by the higher channel selection signal and connects some of the coils in the resonant circuit to ground to reduce the reactance and generate resonance. A tuner circuit for a monitor television according to claim 1, which is configured to increase the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2228282U JPS58125424U (en) | 1982-02-19 | 1982-02-19 | Tuner circuit for monitor TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2228282U JPS58125424U (en) | 1982-02-19 | 1982-02-19 | Tuner circuit for monitor TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58125424U true JPS58125424U (en) | 1983-08-26 |
Family
ID=30034373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2228282U Pending JPS58125424U (en) | 1982-02-19 | 1982-02-19 | Tuner circuit for monitor TV |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58125424U (en) |
-
1982
- 1982-02-19 JP JP2228282U patent/JPS58125424U/en active Pending
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