GB1503546A - Power supply system for operational amplifiers and other circuit components - Google Patents
Power supply system for operational amplifiers and other circuit componentsInfo
- Publication number
- GB1503546A GB1503546A GB24873/75A GB2487375A GB1503546A GB 1503546 A GB1503546 A GB 1503546A GB 24873/75 A GB24873/75 A GB 24873/75A GB 2487375 A GB2487375 A GB 2487375A GB 1503546 A GB1503546 A GB 1503546A
- Authority
- GB
- United Kingdom
- Prior art keywords
- supply
- terminals
- power supply
- diodes
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/577—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads
- G05F1/585—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads providing voltages of opposite polarities
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/021—Current limitation using saturable reactors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
1503546 Controlling aircraft BOEING CO 10 June 1975 [16 Sept 1974 7 Oct 1974] 24873/75 Heading B7G [Also in Division H2] A power supply system for operational amplifiers and other circuit components used in an analog control system employing a plurality of a signal channels, comprises first and second separate D.C. power supplies, both having output terminals which are respectively positive and negative with respect to a point of common potential, diodes poled to conduct current in one direction connecting each of the positive terminals to terminals in all of the channels for connection to a source of positive potential, and diodes poled to conduct current in the opposite direction connecting each of the negative terminals to terminals in all of the channels for connection to a source of negative potential, wherein the diodes are connected so as to prevent a short in one power supply from draining current from the other power supply. The invention may be used in control systems for aircraft or hydrofoils employing redundancy for safety purposes. Fig. 2 shows the application of the invention to a conventional control system for the port and starboard flaps 42, 44, 46, 48 of the aft foils 41 of a hydrofoil craft, the control system including derivative amplifiers 54, 58, 64 respectively supplying servo elements 56, 60 and 66, 70 and being connected to power supply leads 76, 78. To prevent an unstable craft condition produced by failure of the supply to the operational amplifiers and other circuit elements in any two of the amplifiers 54, 58, 64, their supply leads 76, 78 are connected through respective pairs of diodes 80, 84 and 82, 86 to separate D.C. power supplies 72, 74, whereby the parallel connection ensures continuity of supply should either supply 72 or 74 fail and the diodes prevent a power drain from one supply (e.g. 72) should a short-circuit occur on the other (74). Supply failure actuates a warning device 88, 90. Each supply 72, 74 may comprise an A.C. source feeding a centre-tapped transformer whose output is rectified and filtered, Fig. 1 (not shown). Alternatively a similar supply as shown in Fig. 3 may be used to prevent power supply faults causing mal-operation of the control system and an unstable craft condition. To this end, the transformer 16 of the A.C. and filtered D.C. system comprising members 10, 12, 16, 20, 22, 24, 28, 30, 32, 36, 38, has a saturable core whereby a short-circuit between either terminal 26, 34 and earth, causing saturation of the transformer and the voltage of that terminal to fall, also causes the voltage of the other terminal to fall simultaneously, so that an operational amplifier 40 supplied from terminals 26, 34 will not be driven hard over. Subsequent removal of the short-circuit or similar fault allows the voltages at terminals 26, 34 to simultaneously return to normal. If the voltage at terminal 26 or 34 exceeds a predetermined value, a Zener diode 92 or 94 breaks down to cause saturation of the transformer and reduction of the voltage across its secondary winding 18.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US506162A US3911324A (en) | 1974-09-16 | 1974-09-16 | Fail-safe power supply |
US05/512,503 US3946375A (en) | 1974-10-07 | 1974-10-07 | Redundant DC power supply for analog computers and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1503546A true GB1503546A (en) | 1978-03-15 |
Family
ID=27055385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24873/75A Expired GB1503546A (en) | 1974-09-16 | 1975-06-10 | Power supply system for operational amplifiers and other circuit components |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5138636A (en) |
DE (2) | DE2560608C2 (en) |
FR (1) | FR2284922A1 (en) |
GB (1) | GB1503546A (en) |
IT (1) | IT1040832B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2137442A (en) * | 1983-03-28 | 1984-10-03 | Grass Valley Group | Rectifier circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4020517A1 (en) * | 1990-06-27 | 1992-01-02 | Holzer Walter | DC supply circuit for gas discharge lamp - uses choke coil infront of full-wave rectifier and output smoothing capacitor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3358210A (en) * | 1964-06-25 | 1967-12-12 | Gen Electric | Voltage regulator |
DE2165904B1 (en) * | 1971-12-31 | 1973-06-28 | Kathrein-Werke Kg, 8200 Rosenheim | System for multiple use of signal lines in buildings |
-
1975
- 1975-06-10 GB GB24873/75A patent/GB1503546A/en not_active Expired
- 1975-07-01 DE DE2560608A patent/DE2560608C2/de not_active Expired
- 1975-07-01 DE DE2529742A patent/DE2529742C2/en not_active Expired
- 1975-07-04 IT IT50365/75A patent/IT1040832B/en active
- 1975-07-04 JP JP50082663A patent/JPS5138636A/en active Pending
- 1975-07-04 FR FR7521069A patent/FR2284922A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2137442A (en) * | 1983-03-28 | 1984-10-03 | Grass Valley Group | Rectifier circuit |
Also Published As
Publication number | Publication date |
---|---|
FR2284922A1 (en) | 1976-04-09 |
AU8207775A (en) | 1976-12-16 |
DE2529742A1 (en) | 1976-03-25 |
IT1040832B (en) | 1979-12-20 |
FR2284922B3 (en) | 1979-04-27 |
JPS5138636A (en) | 1976-03-31 |
DE2529742C2 (en) | 1986-07-31 |
DE2560608C2 (en) | 1989-08-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |