GB991679A - Improvements in or relating to generators for rectangular wave-forms - Google Patents
Improvements in or relating to generators for rectangular wave-formsInfo
- Publication number
- GB991679A GB991679A GB1102963A GB1102963A GB991679A GB 991679 A GB991679 A GB 991679A GB 1102963 A GB1102963 A GB 1102963A GB 1102963 A GB1102963 A GB 1102963A GB 991679 A GB991679 A GB 991679A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- transistor
- transformer
- diode
- march
- 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)
- Dc-Dc Converters (AREA)
Abstract
991,679. Blocking oscillators. SIEMENS & HALSKE A.G. March 20, 1963 [March 21, 1962], No. 11092/63. Headings H3P and H3T. A blocking oscillator comprises a valve or transistor having regenerative feedback via a three-winding transformer, one winding being connected in the output circuit whilst the other two are connected in the control circuit, a semiconductor diode being shunted across the control circuit so as to maintain the output voltage constant between pulses. Both half cycles of the resulting waveform are then substantially rectangular. As shown, transistor T is arranged to be saturated by base current supplied via resistor R1 and winding 2. The collector current increases until the transformer saturates, when the base current is no longer sufficient to maintain the transistor T in saturation. The collector current thus begins to fall so that the transistor T is rapidly cut off by the regenerative feedback action via winding 2 and terminates the positive half cycle across the load R2. The positive potential induced in winding 3 is limited by the forward threshold voltage of diode D1 to a value slightly higher than the supply voltage. The transistor remains non-conductive until the energy of the transformer is reduced sufficiently to cut off diode D1, when a further cycle commences. The mark/ space ratio is dependent on the turns ratio of windings 1, 3 e.g. 1: 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES78597A DE1169509B (en) | 1962-03-21 | 1962-03-21 | Square wave generator based on the blocking oscillator principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB991679A true GB991679A (en) | 1965-05-12 |
Family
ID=7507585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1102963A Expired GB991679A (en) | 1962-03-21 | 1963-03-20 | Improvements in or relating to generators for rectangular wave-forms |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE629889A (en) |
| CH (1) | CH410050A (en) |
| DE (1) | DE1169509B (en) |
| DK (1) | DK106865C (en) |
| GB (1) | GB991679A (en) |
| NL (1) | NL289680A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1245415B (en) * | 1965-02-19 | 1967-07-27 | Siemens Ag | Square-wave generator based on the blocking oscillator principle to generate pulses of the same half-cycle duration and steep edge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1093819B (en) * | 1958-12-31 | 1960-12-01 | Merk Ag Telefonbau Friedrich | Monostable blocking oscillator circuit with high sensitivity |
| DE1111242B (en) * | 1960-07-16 | 1961-07-20 | Kienzle Apparate Gmbh | Blocking oscillator arrangement |
-
0
- BE BE629889D patent/BE629889A/xx unknown
- NL NL289680D patent/NL289680A/xx unknown
-
1962
- 1962-03-21 DE DES78597A patent/DE1169509B/en active Pending
-
1963
- 1963-03-13 CH CH317563A patent/CH410050A/en unknown
- 1963-03-20 DK DK126863A patent/DK106865C/en active
- 1963-03-20 GB GB1102963A patent/GB991679A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE629889A (en) | |
| DE1169509B (en) | 1964-05-06 |
| DK106865C (en) | 1967-03-28 |
| CH410050A (en) | 1966-03-31 |
| NL289680A (en) |
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