GB1100329A - Blocking oscillators - Google Patents
Blocking oscillatorsInfo
- Publication number
- GB1100329A GB1100329A GB5485865A GB5485865A GB1100329A GB 1100329 A GB1100329 A GB 1100329A GB 5485865 A GB5485865 A GB 5485865A GB 5485865 A GB5485865 A GB 5485865A GB 1100329 A GB1100329 A GB 1100329A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- base
- current
- emitter
- periods
- 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
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
- H03K3/30—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using a transformer for feedback, e.g. blocking oscillator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
1,100,329. Transistor blocking oscillator circuits. JOSEPH LUCAS (INDUSTRIES) Ltd. 13 Oct., 1966 [24 Dec., 1965], No. 54858/65. Heading H3T. The off period of a blocking oscillator is determined by a timing capacitor 14 in the base circuit of a transistor 17 which conducts during the on periods of the oscillator, the transistor emitter current being maintained substantially constant during the on periods so that as the collector current rises the base current decreases until a point is reached at which the transistor turns off. When the transistor is turned off, capacitor 14 charges through resistor 13 until the transistor conducts again, when constant emitter current is maintained due to current through resistance 24 causing the emitter potential to rise. The diode 16 clips the voltage at the junction of resistance 15 and winding 18 and so gives the circuit more predictable characteristics. The diode 22 protects the base-emitter junction and could alternatively be placed between the base and winding 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5485865A GB1100329A (en) | 1965-12-24 | 1965-12-24 | Blocking oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5485865A GB1100329A (en) | 1965-12-24 | 1965-12-24 | Blocking oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1100329A true GB1100329A (en) | 1968-01-24 |
Family
ID=10472278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5485865A Expired GB1100329A (en) | 1965-12-24 | 1965-12-24 | Blocking oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1100329A (en) |
-
1965
- 1965-12-24 GB GB5485865A patent/GB1100329A/en not_active Expired
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