JPS62129846U - - Google Patents
Info
- Publication number
- JPS62129846U JPS62129846U JP1692186U JP1692186U JPS62129846U JP S62129846 U JPS62129846 U JP S62129846U JP 1692186 U JP1692186 U JP 1692186U JP 1692186 U JP1692186 U JP 1692186U JP S62129846 U JPS62129846 U JP S62129846U
- Authority
- JP
- Japan
- Prior art keywords
- prescaler
- amplifier
- coaxial cable
- oscillation signal
- 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
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例を示す回路構成図、
第２図はプリスケーラ回路の最小動作入力感度の
周波数特性図、第３図は増幅器の利得周波数特性
図、第４図は定在波特性図、第５図は局部発振信
号の利得周波数特性図、第６図は本考案に係るプ
リスケーラ器の最小動作入力感度の周波数特性図
、第７図はテレビジヨン選局装置の構成図。
２１……同軸ケーブル、２２……増幅器、２３
……プリスケーラ回路、２４……筐体。
FIG. 1 is a circuit diagram showing an embodiment of the present invention;
Figure 2 is a frequency characteristic diagram of the minimum operating input sensitivity of the prescaler circuit, Figure 3 is a gain frequency characteristic diagram of the amplifier, Figure 4 is a standing wave characteristic diagram, and Figure 5 is a gain frequency characteristic diagram of the local oscillation signal. , FIG. 6 is a frequency characteristic diagram of the minimum operating input sensitivity of the prescaler according to the present invention, and FIG. 7 is a configuration diagram of a television channel selection device. 21...Coaxial cable, 22...Amplifier, 23
...Prescaler circuit, 24...Casing.
Claims (1)
と、この同軸ケーブルの他端に接続する増幅器と
、この増幅器の出力を分周するプリスケーラ回路
とを具備し、前記増幅器及びプリスケーラ回路を
同一筐体内に納めたプリスケーラ器において、前
記プリスケーラ回路の入力感度に応じ前記同軸ケ
ーブルのケーブル長を前記局部発振信号の波長の
１／４以上の適当な値に設定するとともに前記増
幅器と同軸ケーブル間の整合を調整することによ
り前記局部発振信号に対する最小入力感度の周波
数特性を略平坦なものとすることを特徴とするプ
リスケーラ器。 It is equipped with a coaxial cable to which a local oscillation signal is supplied at one end, an amplifier connected to the other end of this coaxial cable, and a prescaler circuit for frequency dividing the output of this amplifier, and the amplifier and prescaler circuit are housed in the same housing. In the installed prescaler, the cable length of the coaxial cable is set to an appropriate value of 1/4 or more of the wavelength of the local oscillation signal according to the input sensitivity of the prescaler circuit, and the matching between the amplifier and the coaxial cable is adjusted. A prescaler characterized in that, by doing so, the frequency characteristic of the minimum input sensitivity to the local oscillation signal is made substantially flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1692186U JPS62129846U (en) | 1986-02-10 | 1986-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1692186U JPS62129846U (en) | 1986-02-10 | 1986-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62129846U true JPS62129846U (en) | 1987-08-17 |
Family
ID=30809214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1692186U Pending JPS62129846U (en) | 1986-02-10 | 1986-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62129846U (en) |
-
1986
- 1986-02-10 JP JP1692186U patent/JPS62129846U/ja active Pending
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