GB992661A - Improvements of and relating to transistorized control circuits - Google Patents
Improvements of and relating to transistorized control circuitsInfo
- Publication number
- GB992661A GB992661A GB476762A GB476762A GB992661A GB 992661 A GB992661 A GB 992661A GB 476762 A GB476762 A GB 476762A GB 476762 A GB476762 A GB 476762A GB 992661 A GB992661 A GB 992661A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- diode
- voltage
- relating
- feb
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
- H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/70—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices having only two electrodes and exhibiting negative resistance
Landscapes
- Electronic Switches (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Relay Circuits (AREA)
Abstract
992,661. Transistor switching circuits. BROWN BOVERI & CO. Ltd. Feb. 7, 1962 [Feb. 9, 1961], No. 4767/62. Heading H3T. A transistor switching circuit operated from a supply having a voltage greater than the maximum safe value for the transistor is protected from damage by connecting a 4-layer diode 2 in series with the transistor and shunting the transistor by a resistor 6 such that the current flow is less than the diode breakdown current, whereby the voltage drop across the diode reduces the transistor voltage to a safe value. When the transistor is rendered conductive the diode breaks down and the full voltage is applied to the relay or other load 3.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH154761A CH383502A (en) | 1961-02-09 | 1961-02-09 | Relay circuit with a transistor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB992661A true GB992661A (en) | 1965-05-19 |
Family
ID=4212960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB476762A Expired GB992661A (en) | 1961-02-09 | 1962-02-07 | Improvements of and relating to transistorized control circuits |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE613608A (en) |
CH (1) | CH383502A (en) |
DE (1) | DE1171500B (en) |
FR (1) | FR1314215A (en) |
GB (1) | GB992661A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL122382C (en) * | 1963-12-17 | |||
FR2219554B1 (en) * | 1973-02-28 | 1978-03-03 | Electricite De France |
-
1961
- 1961-02-09 CH CH154761A patent/CH383502A/en unknown
- 1961-02-27 DE DE1961A0036821 patent/DE1171500B/en active Pending
-
1962
- 1962-02-07 GB GB476762A patent/GB992661A/en not_active Expired
- 1962-02-07 BE BE613608A patent/BE613608A/en unknown
- 1962-02-07 FR FR887230A patent/FR1314215A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1171500B (en) | 1964-06-04 |
BE613608A (en) | 1962-05-29 |
CH383502A (en) | 1964-10-31 |
FR1314215A (en) | 1963-01-04 |
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