JPS6452308U - - Google Patents
Info
- Publication number
- JPS6452308U JPS6452308U JP14680887U JP14680887U JPS6452308U JP S6452308 U JPS6452308 U JP S6452308U JP 14680887 U JP14680887 U JP 14680887U JP 14680887 U JP14680887 U JP 14680887U JP S6452308 U JPS6452308 U JP S6452308U
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- amplification section
- current
- resistance value
- frequency amplification
- 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims 5
- 230000002238 attenuated effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Description
第１図はこの考案による高周波増幅器の１実施
例の回路図、第２図は同実施例の利得特性を示す
図、第３図は同実施例の可変抵抗器の腕を一端ａ
側に摺動させた状態での２信号歪特性を示す図、
第４図は同実施例の可変抵抗器の腕を他端ｂ側に
摺動させた状態での２信号歪特性を示す図、第５
図は同実施例の雑音指数特性を示す図、第６図は
従来の高周波増幅器の１例の回路図、第７図は他
の従来の高周波増幅器の回路図である。
３４……ＰＩＮダイオード、３６……トランジ
スタ（高周波増幅器）、４６……可変抵抗器。
Fig. 1 is a circuit diagram of an embodiment of the high frequency amplifier according to this invention, Fig. 2 is a diagram showing the gain characteristics of the embodiment, and Fig. 3 shows the arm of the variable resistor of the embodiment.
A diagram showing two-signal distortion characteristics in a state where it is slid to the side,
Figure 4 is a diagram showing the two-signal distortion characteristics when the arm of the variable resistor of the same example is slid to the other end b side;
6 is a diagram showing the noise figure characteristics of the same embodiment, FIG. 6 is a circuit diagram of one example of a conventional high frequency amplifier, and FIG. 7 is a circuit diagram of another conventional high frequency amplifier. 34... PIN diode, 36... transistor (high frequency amplifier), 46... variable resistor.
Claims (1)
と、この高周波増幅部の入力側に直列に設けられ
供給された電流に応じて高周波抵抗値を変化して
上記高周波増幅部に供給される高周波信号を減衰
させるＰＩＮダイオードと、このＰＩＮダイオー
ドと可変抵抗器とを含み上記増幅器にバイアス電
流を供給するバイアス回路とを、具備し、このバ
イアス回路を、上記可変抵抗器が上記ＰＩＮダイ
オードに高周波抵抗値が小さくなる電流を流した
とき、雑音指数が良くなるバイアス電流を上記高
周波増幅部に流し、上記可変抵抗器が上記ＰＩＮ
ダイオードに上記高周波抵抗値が大きくなる電流
を流したとき、歪特性が良くなるバイアス電流を
上記高周波増幅部に流すように構成したことを特
徴とする高周波増幅器。 A high frequency amplification section that amplifies an input high frequency signal, and a high frequency resistance value that is provided in series on the input side of this high frequency amplification section and changes a high frequency resistance value according to the supplied current to amplify the high frequency signal that is supplied to the high frequency amplification section. The bias circuit includes a PIN diode to be attenuated, and a bias circuit that includes the PIN diode and a variable resistor and supplies a bias current to the amplifier. When a current that decreases is applied, a bias current that improves the noise figure is applied to the high frequency amplification section, and the variable resistor is connected to the PIN.
A high-frequency amplifier characterized in that, when a current that increases the high-frequency resistance value is passed through the diode, a bias current that improves distortion characteristics is passed through the high-frequency amplification section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987146808U JPH0526815Y2 (en) | 1987-09-25 | 1987-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987146808U JPH0526815Y2 (en) | 1987-09-25 | 1987-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452308U true JPS6452308U (en) | 1989-03-31 |
| JPH0526815Y2 JPH0526815Y2 (en) | 1993-07-07 |
Family
ID=31416639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987146808U Expired - Lifetime JPH0526815Y2 (en) | 1987-09-25 | 1987-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526815Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163815U (en) * | 1981-04-06 | 1982-10-15 | ||
| JPS58121416U (en) * | 1982-02-09 | 1983-08-18 | 三菱電機株式会社 | High frequency amplifier circuit |
-
1987
- 1987-09-25 JP JP1987146808U patent/JPH0526815Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163815U (en) * | 1981-04-06 | 1982-10-15 | ||
| JPS58121416U (en) * | 1982-02-09 | 1983-08-18 | 三菱電機株式会社 | High frequency amplifier circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0526815Y2 (en) | 1993-07-07 |
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