JPH01124708U - - Google Patents
Info
- Publication number
- JPH01124708U JPH01124708U JP2025788U JP2025788U JPH01124708U JP H01124708 U JPH01124708 U JP H01124708U JP 2025788 U JP2025788 U JP 2025788U JP 2025788 U JP2025788 U JP 2025788U JP H01124708 U JPH01124708 U JP H01124708U
- Authority
- JP
- Japan
- Prior art keywords
- output
- low
- conversion device
- noise amplifier
- frequency conversion
- 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 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Superheterodyne Receivers (AREA)
- Amplifiers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図は従来のＬＮＢの構成を示すブロ
ツク図、第３図は低雑音ＦＥＴの最小雑音指数と
ドレイン電流との関係を示すグラフ、第４図は同
ＦＥＴのゲート・ソース間電圧とドレイン電流と
の関係を示すグラフである。
１……高周波増幅器（低雑音増幅器）、２，３
，４……ＦＥＴ（増幅素子）、５……バイアス回
路、５ｎ……負電圧入力端、６……ミキサー、７
……局部発振器、８……結合器、Ｄ……ミキサー
・ダイオード、Ｒ……抵抗（バイアス抵抗）、２
０……接続線。
Fig. 1 is a block diagram showing the configuration of an embodiment of this invention, Fig. 2 is a block diagram showing the configuration of a conventional LNB, and Fig. 3 shows the relationship between the minimum noise figure and drain current of a low-noise FET. The graph in FIG. 4 is a graph showing the relationship between the gate-source voltage and drain current of the same FET. 1... High frequency amplifier (low noise amplifier), 2, 3
, 4...FET (amplification element), 5... Bias circuit, 5n... Negative voltage input terminal, 6... Mixer, 7
...Local oscillator, 8...Coupler, D...Mixer diode, R...Resistor (bias resistance), 2
0... Connection line.
Claims (1)
幅器の出力と発振器の出力とをミキサー・ダイオ
ードによつて混合することにより、周波数変換し
て出力する周波数変換装置において、 前記ミキサー・ダイオードの検波出力端と接地
間に介挿されたバイアス抵抗に生じる負電圧を、
前記低雑音増幅器の増幅素子にバイアス電圧とし
て印加することを特徴とする周波数変換装置。[Claims for Utility Model Registration] A frequency conversion device that amplifies a received signal using a low-noise amplifier and mixes the output of the amplifier with the output of an oscillator using a mixer diode to convert the frequency and output the result. In this case, the negative voltage generated in the bias resistor inserted between the detection output terminal of the mixer diode and the ground is
A frequency conversion device characterized in that a bias voltage is applied to an amplification element of the low-noise amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025788U JPH071854Y2 (en) | 1988-02-18 | 1988-02-18 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025788U JPH071854Y2 (en) | 1988-02-18 | 1988-02-18 | Frequency converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01124708U true JPH01124708U (en) | 1989-08-24 |
| JPH071854Y2 JPH071854Y2 (en) | 1995-01-18 |
Family
ID=31236469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2025788U Expired - Lifetime JPH071854Y2 (en) | 1988-02-18 | 1988-02-18 | Frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071854Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06310949A (en) * | 1993-04-22 | 1994-11-04 | Nec Corp | High frequency amplifier circuit and its control method |
-
1988
- 1988-02-18 JP JP2025788U patent/JPH071854Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06310949A (en) * | 1993-04-22 | 1994-11-04 | Nec Corp | High frequency amplifier circuit and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071854Y2 (en) | 1995-01-18 |