JPS5599812A - Broad band balanced amplifier having gain selection function - Google Patents
Broad band balanced amplifier having gain selection functionInfo
- Publication number
- JPS5599812A JPS5599812A JP654079A JP654079A JPS5599812A JP S5599812 A JPS5599812 A JP S5599812A JP 654079 A JP654079 A JP 654079A JP 654079 A JP654079 A JP 654079A JP S5599812 A JPS5599812 A JP S5599812A
- Authority
- JP
- Japan
- Prior art keywords
- output terminals
- difference
- broad band
- gain selection
- 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
Landscapes
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To enable to perform broad band amplification having the gain selection functions less in the points of adjustment and in drift, by comparing the input signal with the difference signal voltage between the output terminals by means of the first operational amplifier and performing negative feedback the difference to the amplifying transistor. CONSTITUTION:The operational amplifiers 61, 68 and 80 are placed between the signal input terminal 1 and signal output terminals 2, 3. Further, the amplifier 68 inputs the output of the output terminals 2 and 3, amplifies the potential difference between the output terminals 2 and 3 and feeds it to the operational amplifier 80. This amplifier 80 compares the input signal with the difference signal voltage between the output terminals 2 and 3, and the difference is negative-fed-back to the base of the amplifying transistor Tr28. This negative feedback compensates the variation in the potential difference between the terminals 2 and 3 accompanied with the gain selection and with the drift due to the amplifying circuit consisting of Tr27...34. Thus, the broad band amplification having the gain selective functions less in the points of adjustment and in the drift can be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP654079A JPS6056322B2 (en) | 1979-01-25 | 1979-01-25 | Wideband balanced amplifier with gain switching function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP654079A JPS6056322B2 (en) | 1979-01-25 | 1979-01-25 | Wideband balanced amplifier with gain switching function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5599812A true JPS5599812A (en) | 1980-07-30 |
| JPS6056322B2 JPS6056322B2 (en) | 1985-12-10 |
Family
ID=11641170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP654079A Expired JPS6056322B2 (en) | 1979-01-25 | 1979-01-25 | Wideband balanced amplifier with gain switching function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056322B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829208A (en) * | 1981-08-14 | 1983-02-21 | Nippon Gakki Seizo Kk | Gain control amplifier |
| JPS58124306A (en) * | 1982-01-20 | 1983-07-23 | Sony Tektronix Corp | Amplifying circuit |
| JPS62105507A (en) * | 1985-11-01 | 1987-05-16 | Iwatsu Electric Co Ltd | Differential amplifier |
-
1979
- 1979-01-25 JP JP654079A patent/JPS6056322B2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829208A (en) * | 1981-08-14 | 1983-02-21 | Nippon Gakki Seizo Kk | Gain control amplifier |
| JPH037161B2 (en) * | 1981-08-14 | 1991-01-31 | Yamaha Corp | |
| JPS58124306A (en) * | 1982-01-20 | 1983-07-23 | Sony Tektronix Corp | Amplifying circuit |
| JPH0212406B2 (en) * | 1982-01-20 | 1990-03-20 | Sony Tektronix Corp | |
| JPS62105507A (en) * | 1985-11-01 | 1987-05-16 | Iwatsu Electric Co Ltd | Differential amplifier |
| JPH0457242B2 (en) * | 1985-11-01 | 1992-09-11 | Iwatsu Electric Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6056322B2 (en) | 1985-12-10 |
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