JPH0260314U - - Google Patents
Info
- Publication number
- JPH0260314U JPH0260314U JP13831488U JP13831488U JPH0260314U JP H0260314 U JPH0260314 U JP H0260314U JP 13831488 U JP13831488 U JP 13831488U JP 13831488 U JP13831488 U JP 13831488U JP H0260314 U JPH0260314 U JP H0260314U
- Authority
- JP
- Japan
- Prior art keywords
- low
- positive phase
- modulator
- input
- phase amplifier
- 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 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図ａ，ｂは第１図の実施例の変調信号出力レベル
と温度との関係を示す特性図、第３図は本考案の
他の実施例を示す回路図、第４図は従来の低周波
増幅回路の構成を示す回路図、第５図は従来回路
の変調信号出力レベルと温度との関係を示す特性
図である。
１，１１……ローパスフイルタ、２……減衰量
調整回路、３，１２……温度補償回路、４，１４
……変調器、１０……減衰バイアス回路、１５…
…変調信号の入力端子、１６……基準電圧の入力
端子、ＯＰ１，ＯＰ２，ＯＰ３……演算増幅器、
ＶＲ１，ＶＲ２，ＶＲ３……可変抵抗器、ＳＭ…
…サーミスタ、ＭＳ……変調信号、ＶＲ……基準
電圧。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
Figures a and b are characteristic diagrams showing the relationship between the modulation signal output level and temperature of the embodiment shown in Figure 1, Figure 3 is a circuit diagram showing another embodiment of the present invention, and Figure 4 is a conventional low frequency FIG. 5 is a circuit diagram showing the configuration of the amplifier circuit, and a characteristic diagram showing the relationship between the modulation signal output level and temperature of the conventional circuit. 1, 11...Low pass filter, 2...Attenuation adjustment circuit, 3, 12...Temperature compensation circuit, 4, 14
...Modulator, 10...Attenuation bias circuit, 15...
...Modulation signal input terminal, 16...Reference voltage input terminal, OP1, OP2, OP3...Operation amplifier,
VR1, VR2, VR3...variable resistor, SM...
...Thermistor, MS...Modulation signal, VR...Reference voltage.
Claims (1)
幅回路において、 前記変調信号の低域周波数成分のみを通過させ
るローパスフイルタと、 このローパスフイルタから出力される変調信号
を増幅する正相増幅器と、 この正相増幅器の出力端子と反転入力端子との
間に接続された利得調整用可変抵抗器と、 所定のバイアス電圧が印加され、出力電圧を前
記正相増幅器の反転入力端子に入力する温度補償
用サーミスタと、 を備え、前記正相増幅器の出力を変調器に入力す
るように構成された変調器用低周波増幅回路。[Claims for Utility Model Registration] A low-frequency amplification circuit that amplifies a modulated signal input to a modulator, comprising: a low-pass filter that passes only low-frequency components of the modulated signal; and a low-pass filter that passes only the low frequency component of the modulated signal; a positive phase amplifier for amplification; a variable resistor for gain adjustment connected between the output terminal and the inverting input terminal of the positive phase amplifier; and a predetermined bias voltage applied to the output voltage of the positive phase amplifier. A low frequency amplifier circuit for a modulator, comprising: a temperature compensation thermistor input to an input terminal, and configured to input an output of the positive phase amplifier to a modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13831488U JPH0260314U (en) | 1988-10-24 | 1988-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13831488U JPH0260314U (en) | 1988-10-24 | 1988-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0260314U true JPH0260314U (en) | 1990-05-02 |
Family
ID=31400538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13831488U Pending JPH0260314U (en) | 1988-10-24 | 1988-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0260314U (en) |
-
1988
- 1988-10-24 JP JP13831488U patent/JPH0260314U/ja active Pending
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