JPS5773510A - Input switching amplifier - Google Patents
Input switching amplifierInfo
- Publication number
- JPS5773510A JPS5773510A JP55150359A JP15035980A JPS5773510A JP S5773510 A JPS5773510 A JP S5773510A JP 55150359 A JP55150359 A JP 55150359A JP 15035980 A JP15035980 A JP 15035980A JP S5773510 A JPS5773510 A JP S5773510A
- Authority
- JP
- Japan
- Prior art keywords
- sections
- amplifying section
- input
- stage
- amplifying
- 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
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To decrease the overall chip size, by operating a sole input signal amplifying section at the same time, by a plurality of input signal amplifying sections having a constant current circuit operated alternatively and a single output amplifying section receiving the outputs.
CONSTITUTION: An amplifying section 44 consists of input stage amplifying sections 38, 43, driving stage 39, and output amplifying section 40 coupled at point A, and the sections 38, 43 have input terminals 35, 36 inputting signals S1, S2 from input signal sources 32, 33 and feedback terminals 34, 37 receiving a signal from an output terminal 42 via feedback constant circuits 41, 51. The emitter circuit of the sections 38, 43 provides a constant current citcuit, and one input amplifying section only is operated by turning on/off this circuit, another is made inoperative, and the signals S1, S2 have independent voltage gain and frequency characteristics with the fedback constant circuits 41, 45. Thus, in case of semiconductor integration, since the output stage can be only one stage, the overall chip size can be reduced.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55150359A JPS5773510A (en) | 1980-10-27 | 1980-10-27 | Input switching amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55150359A JPS5773510A (en) | 1980-10-27 | 1980-10-27 | Input switching amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5773510A true JPS5773510A (en) | 1982-05-08 |
Family
ID=15495259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55150359A Pending JPS5773510A (en) | 1980-10-27 | 1980-10-27 | Input switching amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5773510A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6229308A (en) * | 1985-07-30 | 1987-02-07 | Rohm Co Ltd | Input changeover amplifier circuit |
-
1980
- 1980-10-27 JP JP55150359A patent/JPS5773510A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6229308A (en) * | 1985-07-30 | 1987-02-07 | Rohm Co Ltd | Input changeover amplifier circuit |
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