JPS57143907A - Differential amplifier - Google Patents
Differential amplifierInfo
- Publication number
- JPS57143907A JPS57143907A JP2885881A JP2885881A JPS57143907A JP S57143907 A JPS57143907 A JP S57143907A JP 2885881 A JP2885881 A JP 2885881A JP 2885881 A JP2885881 A JP 2885881A JP S57143907 A JPS57143907 A JP S57143907A
- Authority
- JP
- Japan
- Prior art keywords
- trq1
- differential amplifier
- trs
- dynamic range
- power source
- 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
Abstract
PURPOSE: To increase a dynamic range without decreasing the gain of a differential amplifier, by making the saturation currents of both transistors (TR) of the amplifier different.
CONSTITUTION: The emitters of TRs Q1 and Q2 are connected in common and grounded through a constant current power source IO. The collectors of the TRs Q1 and Q2 are both connected to a power source Vcc through a load resistance Rc, and power sources E1 and E2 are connected to their bases. When the saturation current of the TRQ2 is set (n) times that of the TRQ1, the voltage gain of a differential amplifier has little variation, i.e. is nearly equal to that when n=1 unless (n) is extremely large, thereby increasing the dynamic range of a collector current Ic2 nearly (n) times. To the TRQ1, the TRQ1 having emitter area equal to that of the TRQ1 is connected in parallel, and an FET may be used as said TR.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2885881A JPS57143907A (en) | 1981-02-28 | 1981-02-28 | Differential amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2885881A JPS57143907A (en) | 1981-02-28 | 1981-02-28 | Differential amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57143907A true JPS57143907A (en) | 1982-09-06 |
Family
ID=12260075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2885881A Pending JPS57143907A (en) | 1981-02-28 | 1981-02-28 | Differential amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57143907A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60192407A (en) * | 1984-03-14 | 1985-09-30 | Rohm Co Ltd | Voltage current converting circuit |
JPH04211503A (en) * | 1991-02-09 | 1992-08-03 | Rohm Co Ltd | Voltage/current conversion circuit |
JPH0558738U (en) * | 1992-01-21 | 1993-08-03 | 永大産業株式会社 | Handrail attachment |
-
1981
- 1981-02-28 JP JP2885881A patent/JPS57143907A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60192407A (en) * | 1984-03-14 | 1985-09-30 | Rohm Co Ltd | Voltage current converting circuit |
JPH04211503A (en) * | 1991-02-09 | 1992-08-03 | Rohm Co Ltd | Voltage/current conversion circuit |
JPH0558738U (en) * | 1992-01-21 | 1993-08-03 | 永大産業株式会社 | Handrail attachment |
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