CA1192966A - Constant current source for field contact input - Google Patents
Constant current source for field contact inputInfo
- Publication number
- CA1192966A CA1192966A CA000434545A CA434545A CA1192966A CA 1192966 A CA1192966 A CA 1192966A CA 000434545 A CA000434545 A CA 000434545A CA 434545 A CA434545 A CA 434545A CA 1192966 A CA1192966 A CA 1192966A
- Authority
- CA
- Canada
- Prior art keywords
- constant current
- transistor
- collector
- base
- current 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
- H01H1/605—Cleaning of contact-making surfaces by relatively high voltage pulses
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is DC
- G05F3/10—Regulating voltage or current wherein the variable is DC using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is DC using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/18—Regulating voltage or current wherein the variable is DC using uncontrolled devices with non-linear characteristics being semiconductor devices using Zener diodes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
- Control Of Electrical Variables (AREA)
- Direct Current Feeding And Distribution (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of El Displays (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/408,545 US4532466A (en) | 1982-08-16 | 1982-08-16 | Constant current source for field contact input |
| US06/408,545 | 1982-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1192966A true CA1192966A (en) | 1985-09-03 |
Family
ID=23616710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000434545A Expired CA1192966A (en) | 1982-08-16 | 1983-08-15 | Constant current source for field contact input |
Country Status (6)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0687507B2 (ja) * | 1987-11-20 | 1994-11-02 | マツダ株式会社 | 太陽電池機能診断装置 |
| US4831283A (en) * | 1988-05-16 | 1989-05-16 | Bnr Inc. | Terminator current driver with short-circuit protection |
| FR2689258B1 (fr) * | 1992-03-26 | 1996-12-13 | Cegelec | Module d'entree d'information par contact electrique, pour installation de controle/commande. |
| DE59309112D1 (de) * | 1993-12-01 | 1998-12-10 | Asea Brown Boveri | Digitaleingabe für eine Erfassungsstation |
| US5672919A (en) * | 1995-03-24 | 1997-09-30 | Abb Power T&D Company Inc. | Low current binary input subsystem |
| AU731189B1 (en) * | 1999-12-10 | 2001-03-29 | Robert Bosch Gmbh | A switch input circuit |
| US9057743B2 (en) | 2013-04-17 | 2015-06-16 | Ge Intelligent Platforms, Inc. | Apparatus and method for wetting current measurement and control |
| US9541604B2 (en) | 2013-04-29 | 2017-01-10 | Ge Intelligent Platforms, Inc. | Loop powered isolated contact input circuit and method for operating the same |
| CN106471595B (zh) | 2014-07-18 | 2019-04-19 | 通用电气智能平台有限公司 | 支持可编程润湿电流的通用接触件输入 |
| CN112965563B (zh) * | 2021-01-15 | 2022-07-15 | 惠州三华工业有限公司 | 带延时的两级恒流电路及其驱动控制方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2716729A (en) * | 1951-11-24 | 1955-08-30 | Bell Telephone Labor Inc | Transistor circuits with constant output current |
| US3029351A (en) * | 1958-12-19 | 1962-04-10 | Ibm | Contact driver circuit |
| DE1150457B (de) * | 1961-10-24 | 1963-06-20 | Siemens Ag | Schaltung zur Regelung, insbesondere zur Konstanthaltung, des Kollektorstroms eines Transistors |
| DE2421558A1 (de) * | 1974-05-03 | 1975-11-13 | Standard Elektrik Lorenz Ag | Relaisschaltung, insbesondere fuer fernmeldeanlagen |
| US4025850A (en) * | 1975-10-01 | 1977-05-24 | Joseph Spiteri | Passive, solid state wide range voltage checker |
| JPS54107250A (en) * | 1978-02-10 | 1979-08-22 | Hitachi Ltd | Signal transfer circuit using photo coupler |
| JPS5515512A (en) * | 1978-07-19 | 1980-02-02 | Hitachi Ltd | Constant voltage output circuit |
-
1982
- 1982-08-16 US US06/408,545 patent/US4532466A/en not_active Expired - Lifetime
-
1983
- 1983-06-24 AU AU16244/83A patent/AU1624483A/en not_active Abandoned
- 1983-07-28 EP EP83304382A patent/EP0101643A3/en not_active Withdrawn
- 1983-08-03 IN IN965/CAL/83A patent/IN161474B/en unknown
- 1983-08-15 CA CA000434545A patent/CA1192966A/en not_active Expired
- 1983-08-16 JP JP58148889A patent/JPS5953915A/ja active Pending
-
1994
- 1994-05-17 JP JP006542U patent/JPH0725404U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU1624483A (en) | 1984-02-23 |
| EP0101643A3 (en) | 1984-11-07 |
| IN161474B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-12-12 |
| JPS5953915A (ja) | 1984-03-28 |
| JPH0725404U (ja) | 1995-05-12 |
| EP0101643A2 (en) | 1984-02-29 |
| US4532466A (en) | 1985-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |