GB1132231A - Improvements in or relating to transistor drive circuit arrangements - Google Patents
Improvements in or relating to transistor drive circuit arrangementsInfo
- Publication number
- GB1132231A GB1132231A GB382265A GB382265A GB1132231A GB 1132231 A GB1132231 A GB 1132231A GB 382265 A GB382265 A GB 382265A GB 382265 A GB382265 A GB 382265A GB 1132231 A GB1132231 A GB 1132231A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- transistor
- diode
- primary
- 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
-
- 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
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
- H03K4/60—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor
- H03K4/62—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device
- H03K4/64—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device combined with means for generating the driving pulses
Landscapes
- Dc-Dc Converters (AREA)
- Details Of Television Scanning (AREA)
Abstract
1,132,231. Transistor switching circuits. MARCONI CO. Ltd. 8 Dec., 1965 [28 Jan., 1965], No. 3822/65. Heading H3T. A driving circuit for a transistor comprises a transformer having its secondary in the baseemitter circuit of the transistor, a switch device in the primary circuit, a constant voltage device across the primary, effective when the switch is made and a constant voltage device in series with the secondary, effective when the switch is open. Transistor VT, when conducting supplies a constant current at its emitter, biasing diode DZ to its Zener voltage so that a linearly rising current flows in the primary winding of the transformer. Resistor RV1 is adjusted so that the resulting secondary current saturates transistor VT1. When the input transistor is cut off the primary becomes open circuited, D2 blocking forward current in DZ. The back e.m.f. in the secondary biases VT1 to cut off and provides reverse current to remove stored charge carriers. Zener diode D<SP>1</SP>Z is chosen such that the decay time exceeds the charge removal time and ensures a linearly decaying reverse current. When the charge has been removed, diode D1 carries the decaying current. Diode D3 short-circuits RV1 during the reverse current period. The circuit may be used to supply a sawtooth current to deflection coils or in a pulse-type current regulator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB382265A GB1132231A (en) | 1965-01-28 | 1965-01-28 | Improvements in or relating to transistor drive circuit arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB382265A GB1132231A (en) | 1965-01-28 | 1965-01-28 | Improvements in or relating to transistor drive circuit arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1132231A true GB1132231A (en) | 1968-10-30 |
Family
ID=9765586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB382265A Expired GB1132231A (en) | 1965-01-28 | 1965-01-28 | Improvements in or relating to transistor drive circuit arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1132231A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2380666A1 (en) * | 1977-02-14 | 1978-09-08 | Cii Honeywell Bull | CUTOUT CONTROL SYSTEM FOR CONVERTER IN A CONTINUOUS POWER SUPPLY |
-
1965
- 1965-01-28 GB GB382265A patent/GB1132231A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2380666A1 (en) * | 1977-02-14 | 1978-09-08 | Cii Honeywell Bull | CUTOUT CONTROL SYSTEM FOR CONVERTER IN A CONTINUOUS POWER SUPPLY |
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