JPS54137948A - Differential amplifier circuit - Google Patents
Differential amplifier circuitInfo
- Publication number
- JPS54137948A JPS54137948A JP4531478A JP4531478A JPS54137948A JP S54137948 A JPS54137948 A JP S54137948A JP 4531478 A JP4531478 A JP 4531478A JP 4531478 A JP4531478 A JP 4531478A JP S54137948 A JPS54137948 A JP S54137948A
- Authority
- JP
- Japan
- Prior art keywords
- input
- current
- bases
- transistor
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To reduce the chip area at the time of the integration of a circuit, by composing the signal input circuit of a junction type FET and a bipolar transistor. CONSTITUTION:A non-inversion input is supplied to FETQj, and an inversion input is to transistor Q2. When a differential input is supplied, a difference current between constant current Io and collector current of transistor Q7 of the bias circuit flows to the bases of transistors Q3 and Q4 cascaded, thereby attaining level shift operation. Current absorptive transistors Q5 and Q6 are connected in common at their bases and remaining bases and collectors are connected mutually. The difference current can therefore be obtained from output terminal OUT at the time of the differential input. In this case, the FET whose input impedance can be set high is used for a signal input and the bipolar transistor for a feedback input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4531478A JPS54137948A (en) | 1978-04-19 | 1978-04-19 | Differential amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4531478A JPS54137948A (en) | 1978-04-19 | 1978-04-19 | Differential amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54137948A true JPS54137948A (en) | 1979-10-26 |
Family
ID=12715835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4531478A Pending JPS54137948A (en) | 1978-04-19 | 1978-04-19 | Differential amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54137948A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01151309A (en) * | 1987-12-08 | 1989-06-14 | Fujitsu Ltd | Semiconductor integrated circuit device |
| WO2013072950A1 (en) * | 2011-11-14 | 2013-05-23 | 富士電機株式会社 | Electric charge detection circuit |
-
1978
- 1978-04-19 JP JP4531478A patent/JPS54137948A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01151309A (en) * | 1987-12-08 | 1989-06-14 | Fujitsu Ltd | Semiconductor integrated circuit device |
| WO2013072950A1 (en) * | 2011-11-14 | 2013-05-23 | 富士電機株式会社 | Electric charge detection circuit |
| CN103534941A (en) * | 2011-11-14 | 2014-01-22 | 富士电机株式会社 | Electric charge detection circuit |
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