JPH01175032U - - Google Patents
Info
- Publication number
- JPH01175032U JPH01175032U JP7094588U JP7094588U JPH01175032U JP H01175032 U JPH01175032 U JP H01175032U JP 7094588 U JP7094588 U JP 7094588U JP 7094588 U JP7094588 U JP 7094588U JP H01175032 U JPH01175032 U JP H01175032U
- Authority
- JP
- Japan
- Prior art keywords
- vhf
- tuner section
- uhf
- tuner
- switching
- 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
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案に係る電子チユーナの一実施例
を示す要部ブロツク図、第２図は第１図の具体的
回路構成図、第３図は本考案でのＵＨＦバンド及
びＶＨＦバンドの周波数レスポンス特性図、第４
図はＵＨＦ受信時での本考案と従来とのＶＨＦ入
力波形を示す特性図である。第５図はＵＨＦ―Ｖ
ＨＦコンビネーシヨン電子チユーナの回路構成を
示すブロツク図、第６図は従来の電子チユーナの
回路ブロツク図、第７図は従来でのＵＨＦ及びＶ
ＨＦバンドの周波数特性図である。
１……ＵＨＦ用チユーナ部、２……ＶＨＦ用チ
ユーナ部、１０……ＲＦ入力段同調回路、１３…
…混合回路、１８……スイツチングダイオード、
ＢＭ……駆動電圧用端子、ＢＳ……バンド切換用
端子。
Fig. 1 is a block diagram of main parts showing one embodiment of an electronic tuner according to the present invention, Fig. 2 is a specific circuit configuration diagram of Fig. 1, and Fig. 3 is a frequency diagram of the UHF band and VHF band in the present invention. Response characteristic diagram, 4th
The figure is a characteristic diagram showing VHF input waveforms of the present invention and a conventional method during UHF reception. Figure 5 shows UHF-V
A block diagram showing the circuit configuration of an HF combination electronic tuner, Fig. 6 is a circuit block diagram of a conventional electronic tuner, and Fig. 7 shows a conventional UHF and V
FIG. 3 is a frequency characteristic diagram of the HF band. 1... UHF tuner section, 2... VHF tuner section, 10... RF input stage tuning circuit, 13...
...Mixing circuit, 18...Switching diode,
BM...Terminal for drive voltage, BS...Terminal for band switching.
Claims (1)
ら成り、ＶＨＦ用チユーナ部の混合回路をＵＨＦ
受信時にＩＦ増幅段として使用するＵＨＦ―ＶＨ
Ｆコンビネーシヨン電子チユーナにおいて、 ＶＨＦ用チユーナ部のＲＦ入力段同調回路に、
混合回路を常時動作させる電源電圧を印加する駆
動電圧用端子と、ＶＨＦバンド切換用スイツチン
グ電圧用端子間にスイツチングダイオードを接続
したことを特徴とする電子チユーナ。[Claims for Utility Model Registration] Consisting of a UHF tuner section and a VHF tuner section, the mixing circuit of the VHF tuner section is
UHF-VH used as IF amplification stage during reception
In the F combination electronic tuner, in the RF input stage tuning circuit of the VHF tuner section,
An electronic tuner characterized in that a switching diode is connected between a drive voltage terminal for applying a power supply voltage for constantly operating a mixing circuit and a switching voltage terminal for switching VHF bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7094588U JPH01175032U (en) | 1988-05-27 | 1988-05-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7094588U JPH01175032U (en) | 1988-05-27 | 1988-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01175032U true JPH01175032U (en) | 1989-12-13 |
Family
ID=31296158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7094588U Pending JPH01175032U (en) | 1988-05-27 | 1988-05-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01175032U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS553726U (en) * | 1978-06-21 | 1980-01-11 |
-
1988
- 1988-05-27 JP JP7094588U patent/JPH01175032U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS553726U (en) * | 1978-06-21 | 1980-01-11 |
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