GB1019062A - Improvements in or relating to electrical noise generating arrangements - Google Patents
Improvements in or relating to electrical noise generating arrangementsInfo
- Publication number
- GB1019062A GB1019062A GB1665161A GB1665161A GB1019062A GB 1019062 A GB1019062 A GB 1019062A GB 1665161 A GB1665161 A GB 1665161A GB 1665161 A GB1665161 A GB 1665161A GB 1019062 A GB1019062 A GB 1019062A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- transistor
- pulses
- avalanche
- random
- 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
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B29/00—Generation of noise currents and voltages
Landscapes
- Manipulation Of Pulses (AREA)
Abstract
1,019,062. Transistor random noise generator. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 4, 1962 [May 8, 1961], Nos. 16651/61 and 32557/61. Headings H3B and H3T. An electrical noise generating circuit comprises an avalanche transistor J1 biased so that the transistor operates in the avalanche mode under the control of the collector junction random noise peaks when the latter are above a threshold level. In the circuit shown in Fig. 3 the output, from the avalanche transistor generator J1, comprising random positive pulses, is fed to a bi-stable triggering circuit 11, the output at terminal 12 of which, Fig. 4(a) (not shown), is a series of pulses of constant amplitude but random mark/space ratio. In order to keep the mean pulse rate constant the differentiated output pulses from trigger circuit 11 are fed to monostable triggering circuit 14 which provides a series of negative-going pulses of constant amplitude and pulse length for applying to the base of avalanche transistor J1 By varying the time duration of circuit 14 by means of capacitor C3 and resistor R4 the mean pulse rate at terminal 12 can be varied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1665161A GB1019062A (en) | 1961-05-08 | 1961-05-08 | Improvements in or relating to electrical noise generating arrangements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1665161A GB1019062A (en) | 1961-05-08 | 1961-05-08 | Improvements in or relating to electrical noise generating arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1019062A true GB1019062A (en) | 1966-02-02 |
Family
ID=10081160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1665161A Expired GB1019062A (en) | 1961-05-08 | 1961-05-08 | Improvements in or relating to electrical noise generating arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1019062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712162A (en) * | 2018-04-27 | 2018-10-26 | 湖北大学 | A kind of avalanche transistor connection in series-parallel high pressure is soon along switching circuit |
-
1961
- 1961-05-08 GB GB1665161A patent/GB1019062A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712162A (en) * | 2018-04-27 | 2018-10-26 | 湖北大学 | A kind of avalanche transistor connection in series-parallel high pressure is soon along switching circuit |
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