GB953848A - Improvements in or relating to teleprinter systems - Google Patents
Improvements in or relating to teleprinter systemsInfo
- Publication number
- GB953848A GB953848A GB696163A GB696163A GB953848A GB 953848 A GB953848 A GB 953848A GB 696163 A GB696163 A GB 696163A GB 696163 A GB696163 A GB 696163A GB 953848 A GB953848 A GB 953848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- potential
- circuit
- demodulated
- feb
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/142—Compensating direct current components occurring during the demodulation and which are caused by mistuning
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Amplifiers (AREA)
Abstract
953,848. Telegraphy. SIEMENS & HALSKE A.G. Feb. 21, 1963 [Feb. 22, 1962], No. 6961/63. Heading H4P. The invention provides a device for compensating for D.C. superimposed on a demodulated F.M. signal. The demodulated signal controls the switching of a trigger circuit which is such that it is switched when the signal is a predetermined potential above the maximum negative potential of the signal and is switched back again when the signal is at an equ potential below the following maximum positive of the signal. For example, the output of discriminator DS, Fig. 1, is waveform DS, Fig. 3, which has a D.C. bias #U. The range over which diodes D1, D2 do not conduct is C-R1 to R1-C. The potentials C and R1 vary with the demodulated signal as shown, and it is the potential DS-R1 that is used to trigger the bi-stable circuit that forms the remainder of the circuit. The output of the bi-stable circuit is a waveform having square flanks and equal positive and negative excursions. Diodes D1, D2 may be replaced by Zener diode arrangements or by a varistor, Figs. 4-6 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES78154A DE1145666B (en) | 1962-02-22 | 1962-02-22 | Circuit arrangement for the compensation of disturbances occurring during telegraphy transmission with frequency modulation, which have the effect of a direct voltage superimposed on the demodulated double-stream telegraphic characters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB953848A true GB953848A (en) | 1964-04-02 |
Family
ID=7507270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB696163A Expired GB953848A (en) | 1962-02-22 | 1963-02-21 | Improvements in or relating to teleprinter systems |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE628715A (en) |
| DE (1) | DE1145666B (en) |
| DK (1) | DK106617C (en) |
| GB (1) | GB953848A (en) |
| NL (1) | NL289299A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4095163A (en) * | 1976-06-01 | 1978-06-13 | Control Concepts Corporation | Transient voltage suppression circuit |
-
0
- NL NL289299D patent/NL289299A/xx unknown
- BE BE628715D patent/BE628715A/xx unknown
-
1962
- 1962-02-22 DE DES78154A patent/DE1145666B/en active Pending
-
1963
- 1963-02-21 GB GB696163A patent/GB953848A/en not_active Expired
- 1963-02-21 DK DK80163A patent/DK106617C/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE1145666B (en) | 1963-03-21 |
| BE628715A (en) | |
| NL289299A (en) | |
| DK106617C (en) | 1967-02-27 |
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