GB687205A - Improvements in or relating to means for producing pulses of alternating current from direct current impulses - Google Patents
Improvements in or relating to means for producing pulses of alternating current from direct current impulsesInfo
- Publication number
- GB687205A GB687205A GB208950A GB208950A GB687205A GB 687205 A GB687205 A GB 687205A GB 208950 A GB208950 A GB 208950A GB 208950 A GB208950 A GB 208950A GB 687205 A GB687205 A GB 687205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impulses
- direct current
- oscillator
- crystal triode
- electrodes
- 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
- H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
687,205. Semi-conductor circuits. GENERAL ELECTRIC CO., Ltd., and RUTENBERG, A. March 6, 1951 [Jan. 26, 1950], No. 2089/50. Classes 40 (v) and 40 (vi). Means for producing pulses of alternating current from direct current impulses comprises a crystal triode connected in an oscillator circuit, oscillations occurring only during the direct current impulses which supply the operating voltages for all the electrodes of the triode. The oscillator circuit comprises a parallel resonant circuit 8, 9 which is associated with the base, emitter and collector electrodes of a crystal triode 7 in a manner similar to that of a Hartley oscillator. The output is taken from the collector electrode via transformer 14. Direct current impulses, such as positive marking impulses and negative spacing impulses from a telegraph transmitter, are applied to terminals 1, and rectifiers 2 and 4 are provided so that positive pulses cause current to flow through resistances 5 and 6 to provide operating voltages for the electrodes of the crystal triode. Negative pulses cause current to flow through resistance 3, and if desired a second crystal triode oscillator may be associated with this part of the circuit so that marking and spacing impulses of different frequency may be produced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB208950A GB687205A (en) | 1950-01-26 | 1950-01-26 | Improvements in or relating to means for producing pulses of alternating current from direct current impulses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB208950A GB687205A (en) | 1950-01-26 | 1950-01-26 | Improvements in or relating to means for producing pulses of alternating current from direct current impulses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB687205A true GB687205A (en) | 1953-02-11 |
Family
ID=9733388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB208950A Expired GB687205A (en) | 1950-01-26 | 1950-01-26 | Improvements in or relating to means for producing pulses of alternating current from direct current impulses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB687205A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2937236A (en) * | 1956-03-23 | 1960-05-17 | Itt | Fast-switching transistor telegraph repeater |
FR2124077A1 (en) * | 1971-02-03 | 1972-09-22 | Constr Telephoniques | |
FR2639167A1 (en) * | 1988-11-14 | 1990-05-18 | Morey Gilles | METHOD AND SYSTEM FOR TRANSMITTING A SIGNAL |
-
1950
- 1950-01-26 GB GB208950A patent/GB687205A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2937236A (en) * | 1956-03-23 | 1960-05-17 | Itt | Fast-switching transistor telegraph repeater |
FR2124077A1 (en) * | 1971-02-03 | 1972-09-22 | Constr Telephoniques | |
FR2639167A1 (en) * | 1988-11-14 | 1990-05-18 | Morey Gilles | METHOD AND SYSTEM FOR TRANSMITTING A SIGNAL |
EP0370862A1 (en) * | 1988-11-14 | 1990-05-30 | Gilles Morey | Method and system for signal transmission |
US5351273A (en) * | 1988-11-14 | 1994-09-27 | Gilles Morey | Process and system for the transmission of a signal |
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