SE7408490L - - Google Patents
Info
- Publication number
- SE7408490L SE7408490L SE7408490A SE7408490A SE7408490L SE 7408490 L SE7408490 L SE 7408490L SE 7408490 A SE7408490 A SE 7408490A SE 7408490 A SE7408490 A SE 7408490A SE 7408490 L SE7408490 L SE 7408490L
- Authority
- SE
- Sweden
- Prior art keywords
- june
- counter
- gating circuit
- frequency divider
- frequency
- Prior art date
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
- H04L27/12—Modulator circuits; Transmitter circuits
- H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
1454924 Data transmission; f.s.k. modulators SIEMENS AG 24 June 1974 [29 June 1973] 27871/74 Heading H4P A f.s.k. modulator has for each binary valve a different frequency square wave oscillator feeding into a fixed frequency divider through a gating circuit controlled by binary signal input. The gating circuit may comprise NAND gates N1-N3 and inverter I1 and the frequency divider may comprise a dual circuit counter 21, 22. It is stated that phase discontinuities on change from one frequency to another are reduced in proportion to the total division ratio, i.e. in the case of a counter, discontinuity is halved at each successive stage F1, F2 &c.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732333253 DE2333253A1 (en) | 1973-06-29 | 1973-06-29 | MODULATOR FOR GENERATING FREQUENCY MODULATED SIGNALS |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7408490L true SE7408490L (en) | 1974-12-30 |
Family
ID=5885534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7408490A SE7408490L (en) | 1973-06-29 | 1974-06-27 |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE817046A (en) |
CH (1) | CH571295A5 (en) |
DE (1) | DE2333253A1 (en) |
DK (1) | DK335174A (en) |
FR (1) | FR2235554B1 (en) |
GB (1) | GB1454924A (en) |
IT (1) | IT1015490B (en) |
NL (1) | NL7408531A (en) |
SE (1) | SE7408490L (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3417332A (en) * | 1965-02-11 | 1968-12-17 | Nasa | Frequency shift keying apparatus |
US3663754A (en) * | 1970-05-18 | 1972-05-16 | Totuus Communications Inc | Communication system having modulator for generating orthogonal continuous phase synchronous binary fsk |
-
1973
- 1973-06-29 DE DE19732333253 patent/DE2333253A1/en active Pending
-
1974
- 1974-05-20 FR FR7417401A patent/FR2235554B1/fr not_active Expired
- 1974-06-11 CH CH792874A patent/CH571295A5/xx not_active IP Right Cessation
- 1974-06-21 DK DK335174A patent/DK335174A/da unknown
- 1974-06-24 GB GB2787174A patent/GB1454924A/en not_active Expired
- 1974-06-25 NL NL7408531A patent/NL7408531A/xx unknown
- 1974-06-27 SE SE7408490A patent/SE7408490L/ not_active Application Discontinuation
- 1974-06-28 IT IT2453074A patent/IT1015490B/en active
- 1974-06-28 BE BE146044A patent/BE817046A/en unknown
Also Published As
Publication number | Publication date |
---|---|
GB1454924A (en) | 1976-11-10 |
FR2235554A1 (en) | 1975-01-24 |
DK335174A (en) | 1975-03-24 |
IT1015490B (en) | 1977-05-10 |
DE2333253A1 (en) | 1975-01-23 |
CH571295A5 (en) | 1975-12-31 |
NL7408531A (en) | 1974-12-31 |
FR2235554B1 (en) | 1977-03-11 |
BE817046A (en) | 1974-12-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 7408490-6 |