JPH01110516U

JPH01110516U -

Info

Publication number: JPH01110516U
Application number: JP1988005600U
Authority: JP
Priority date: 1988-01-19
Filing date: 1988-01-19
Publication date: 1989-07-26

Description

[Brief explanation of the drawing]

第１図はこの考案のよる直流交流分離機能付高
周波混合器の第１の実施例の回路図、第２図は同
第１の実施例の端子２０に供給される電力の波形
図、第３図は同第２の実施例の部分省略回路図、
第４図は同第３の実施例の端子２０に供給される
電力の波形図、第５図は同第３の実施例の部分省
略回路図、第６図は同第４の実施例の部分省略回
路図、第７図は従来の混合器を用いた衛星放送及
びＶＨＦ・ＵＨＦテレビの受信システムのブロツ
ク図、第８図はこの考案による混合器を用いた衛
星放送及びＶＨＦ・ＵＨＦテレビの受信システム
のブロツク図である。２０…同軸ケーブル接続用端子（第３の端子）
、２２…同軸ケーブル接続用端子（第１の端子）
、２４…同軸ケーブル接続用端子（第２の端子）
、３２…ダイオード（第１の分離手段）、４０…
ダイオード（第２の分離手段）、｛５４…ローパ
スフイルタ、５８…ハイパスフイルタ｝混合部、
｛４８…コンデンサ、５０…高周波阻止コイル｝
反転部。 FIG. 1 is a circuit diagram of a first embodiment of the high frequency mixer with DC/AC separation function according to this invention, FIG. 2 is a waveform diagram of the power supplied to the terminal 20 of the first embodiment, and FIG. The figure is a partially omitted circuit diagram of the second embodiment,
Fig. 4 is a waveform diagram of the power supplied to the terminal 20 of the third embodiment, Fig. 5 is a partially omitted circuit diagram of the third embodiment, and Fig. 6 is a portion of the fourth embodiment. An abbreviated circuit diagram, Fig. 7 is a block diagram of a reception system for satellite broadcasting and VHF/UHF television using a conventional mixer, and Fig. 8 is a block diagram of a reception system for satellite broadcasting and VHF/UHF television using a mixer according to this invention. FIG. 2 is a block diagram of the system. 20...Coaxial cable connection terminal (third terminal)
, 22...Coaxial cable connection terminal (first terminal)
, 24...Coaxial cable connection terminal (second terminal)
, 32...diode (first separation means), 40...
Diode (second separation means), {54...low-pass filter, 58...high-pass filter} mixing section,
{48...capacitor, 50...high frequency blocking coil}
Inversion section.

Claims

[Claims for Utility Model Registration] (1) A first terminal connected to a first high-frequency device that operates upon receiving power of positive polarity and generates a signal of a first frequency; The second
a second terminal connected to a second high-frequency device that generates a signal at a frequency of a mixing unit that generates a mixed signal;
A third terminal receives the mixed signal from the mixing section and transmits it to the cable, and also receives the electric power transmitted via the cable in a time-sharing manner such that the DC component power is positive and the AC component power is negative polarity. and a first separating means connected to the third terminal to separate the DC power from the power and supply it to the first terminal; and a first separating means connected to the third terminal to separate the DC power from the power and supply the AC power from the power. a second terminal which is separated and supplied to a second terminal;
1. A high-frequency mixer with a DC/AC separation function, comprising a separating means and an inverting section connected between the second terminal and a reference potential point and inverting negative polarity power to positive polarity power. (2) The first and second high-frequency devices operate by receiving power of negative polarity, and the inverting section receives power of positive polarity connected between the first terminal and the reference potential point. A high-frequency mixer with a DC/AC separation function according to claim 1, which is characterized in that the electric power is inverted to negative polarity. (3) The above power is transmitted in a time-sharing manner, with AC power being transmitted with positive polarity and DC power being transmitted with negative polarity, respectively.
The high frequency mixer with a DC/AC separation function according to claim 1, wherein the inverting section is connected between the first terminal and the reference potential point. (4) The first and second high-frequency devices operate by receiving power of negative polarity, and the power is time-divisionally transmitted as AC power with positive polarity and DC power with negative polarity, respectively, A high frequency mixer with a DC/AC separation function, wherein the inverting section inverts positive polarity power to negative polarity power. (5) The terminal to which the inverted portion is connected consists of a core connection portion of the coaxial cable and a sheath connection portion of the coaxial cable, and the inverted portion is connected between the sheath connection portion and the reference potential. and a high frequency pass blocking element connected between the core wire connection portion and the reference potential.
The high frequency mixer with a DC/AC separation function according to item 3 or 4. (6) The high-frequency mixer with a DC/AC separation function according to claim 5, wherein the high-frequency pass blocking element is a high-frequency blocking coil.