JPS5696307A - Constant-current circuit - Google Patents
Constant-current circuitInfo
- Publication number
- JPS5696307A JPS5696307A JP17279879A JP17279879A JPS5696307A JP S5696307 A JPS5696307 A JP S5696307A JP 17279879 A JP17279879 A JP 17279879A JP 17279879 A JP17279879 A JP 17279879A JP S5696307 A JPS5696307 A JP S5696307A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- load
- supplied
- resistance
- 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
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To supply a constant current, where the frequency response is good and the error can be ignored, to the load, by supplying the output of the first amplifier out of equal operational amplifiers to the positive input of the second amplifier and supplying the output of the second amplifier to the load and the positive input of the first amplifier.
CONSTITUTION: Operational amplifiers 7 and 8 having equal positive and negative input voltages and output voltages are provided, and the output of amplifier 8 is supplied to the positive input of amplifier 7 through resistance R9, and the voltage from voltage source 6 is supplied to the negative input of amplifier 7 through resistance R7. The output of amplifier 7 is supplied to load L and the positive input of amplifier 8 through resistance R5 and is supplied to its own negative input through resistance R6, and the positive input is grounded through resistance R8. The output of amplifier 8 is connected to its own negative input. If resistances R6 and R7 are set equal to each other and resistances R8 and R9 are set equal to each other, the voltage of output terminal Q3 of amplifier 7 becomes equal to the sum of voltage EA from voltage source 6 and the voltage to input point Q2 to load L. Consequently, a constant current equal to -EA/R5 is flowed to load L, and the error due to temperature change does not exist, and a good-response constant current is supplied to the load because the frequency response is determined by amplification.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17279879A JPS5696307A (en) | 1979-12-28 | 1979-12-28 | Constant-current circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17279879A JPS5696307A (en) | 1979-12-28 | 1979-12-28 | Constant-current circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5696307A true JPS5696307A (en) | 1981-08-04 |
Family
ID=15948553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17279879A Pending JPS5696307A (en) | 1979-12-28 | 1979-12-28 | Constant-current circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5696307A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7391192B2 (en) | 2000-08-31 | 2008-06-24 | Primarion, Inc. | Apparatus and system for providing transient suppression power regulation |
JP2019215976A (en) * | 2018-06-12 | 2019-12-19 | 株式会社日立ハイテクノロジーズ | Charged particle beam control apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49112150A (en) * | 1973-02-27 | 1974-10-25 |
-
1979
- 1979-12-28 JP JP17279879A patent/JPS5696307A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49112150A (en) * | 1973-02-27 | 1974-10-25 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7391192B2 (en) | 2000-08-31 | 2008-06-24 | Primarion, Inc. | Apparatus and system for providing transient suppression power regulation |
US7616456B2 (en) | 2000-08-31 | 2009-11-10 | Primarion Corporation | Apparatus and system for providing transient suppression power regulation |
JP2019215976A (en) * | 2018-06-12 | 2019-12-19 | 株式会社日立ハイテクノロジーズ | Charged particle beam control apparatus |
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