JPS5956841U - CATV tuner input circuit - Google Patents
CATV tuner input circuitInfo
- Publication number
- JPS5956841U JPS5956841U JP14849182U JP14849182U JPS5956841U JP S5956841 U JPS5956841 U JP S5956841U JP 14849182 U JP14849182 U JP 14849182U JP 14849182 U JP14849182 U JP 14849182U JP S5956841 U JPS5956841 U JP S5956841U
- Authority
- JP
- Japan
- Prior art keywords
- band
- tuner
- circuit
- vhf
- stages
- 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
- Channel Selection Circuits, Automatic Tuning Circuits (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図は本考案の前提であるＣＡＴＶチューナのブロッ
クダイヤグラム、及び第２図は本考案の−ＣＡＴＶチュ
ーナの入力回路を示す要部回路図である。
２１・・・・・・ＵＨＦ帯域チューナ回路、２２・旧・
・ＶＨＦ帯高域チューナ回路、２４・・・・・・ＵＨＦ
帯餓動作電源端子、２９．３０・・・・・・ＶＨＦ帯入
力側グイ、オード、３１・・・・・・共通接続点、３４
・・・・・・直流バイアス手段（抵抗）、３６・・＝・
・・バイアス抵抗。FIG. 1 is a block diagram of a CATV tuner which is the premise of the present invention, and FIG. 2 is a circuit diagram of a main part showing an input circuit of the CATV tuner of the present invention. 21...UHF band tuner circuit, 22. Old.
・VHF band high frequency tuner circuit, 24...UHF
Band starvation operation power supply terminal, 29.30... VHF band input side guide, ode, 31... Common connection point, 34
...DC bias means (resistance), 36...=...
...Bias resistance.
Claims (1)
信号をそれぞれ独立したＲＦ増幅段、混合段及び局部発
振段を含むチューナ回路により処理し、前記ＶＨＦ帯雨
域の異なる受信信号をそれぞれのチ、１−す回路の入力
側にダイオードを介挿しその導通により各チューナ回路
に結合するＣＡＴＶチューナにおいて、前記しＩＨＦ帯
域の動作電源端子及び前記各ダイオードの共通接続点間
に直流バイアス手段を介挿して成り、ＵＨＦ帯の受信に
際し、前記直流バイアス手段により前記各ダイオードを
逆方向バイアスしてＶＨＦ帯信号による受信妨害を排除
することを特徴とするＣＡＴＶチューナの入力回路。The received signals of the UHF band as well as the VHF band high band and VHF band low band are processed by tuner circuits including independent RF amplification stages, mixing stages, and local oscillation stages, and the different received signals of the VHF band are processed by the respective channels. In a CATV tuner in which a diode is inserted on the input side of the first circuit and connected to each tuner circuit through conduction, a DC bias means is inserted between the above-mentioned IHF band operating power supply terminal and the common connection point of each of the diodes. An input circuit for a CATV tuner, characterized in that when receiving a UHF band signal, each of the diodes is biased in a reverse direction by the DC bias means to eliminate reception interference caused by a VHF band signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14849182U JPS5956841U (en) | 1982-09-30 | 1982-09-30 | CATV tuner input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14849182U JPS5956841U (en) | 1982-09-30 | 1982-09-30 | CATV tuner input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5956841U true JPS5956841U (en) | 1984-04-13 |
Family
ID=30329898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14849182U Pending JPS5956841U (en) | 1982-09-30 | 1982-09-30 | CATV tuner input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5956841U (en) |
-
1982
- 1982-09-30 JP JP14849182U patent/JPS5956841U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5956841U (en) | CATV tuner input circuit | |
| JPS5956840U (en) | CATV tuner input circuit | |
| JPS5920768U (en) | Television receiver audio demodulation circuit | |
| JPS5957049U (en) | High frequency connection circuit | |
| JPS59118347U (en) | Chuyuna | |
| JPS5978749U (en) | DX-LOCAL switching circuit of FM/AM receiver | |
| JPS5837242U (en) | receiving circuit | |
| JPS58141637U (en) | RF switch circuit | |
| JPS60114452U (en) | Diversity receiving device | |
| JPS5834448U (en) | Intermediate frequency bandwidth switching circuit | |
| JPS6052734U (en) | High frequency signal switching device | |
| JPS6014544U (en) | antenna switching circuit | |
| JPS5864157U (en) | FM/AM reception switching circuit in radio receiver | |
| JPS60181940U (en) | AM/FM stereo receiver | |
| JPS5994454U (en) | DX-LOCAL switching circuit of FM/AM receiver | |
| JPS6129552U (en) | Transmission/reception switching circuit in radio equipment | |
| JPS61195645U (en) | ||
| JPS604047U (en) | Receiving machine | |
| JPS58169744U (en) | VHF tuner input tuning circuit | |
| JPS6144942U (en) | FM receiver | |
| JPS60129753U (en) | Switch circuit of audio/audio complex equipment | |
| JPS6025250U (en) | VHF tuner input circuit | |
| JPS58125444U (en) | AM/FM receiver | |
| JPS6121134U (en) | VHF tuner input circuit | |
| JPS5857122U (en) | Tuning display circuit |