WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1979000718) AMPLITUDE AND FREQUENCY MODULATION SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000718    International Application No.:    PCT/US1979/000101
Publication Date: 04.10.1979 International Filing Date: 26.02.1979
IPC:
H04L 27/12 (2006.01), H04L 27/32 (2006.01)
Applicants:
Inventors:
Priority Data:
883656 06.03.1978 US
Title (EN) AMPLITUDE AND FREQUENCY MODULATION SYSTEM
(FR) SYSTEME DE MODULATION D"AMPLITUDE ET DE FREQUENCE
Abstract: front page image
(EN)Significant suppression of one side band of a carrier wave, frequency modulated by a baseband signal, is achieved by simultaneous and direct amplitude modulation of the carrier wave with the baseband signal when a ratio (P, fig. 2) of minimum to maximum amplitudes of the carrier wave is substantially constrained by the inequality 0.6 P 0.9. A pair of amplifiers (302, 304, Fig. 3), each having a predetermined gain wherein the ratio of the gain of the amplifier is substantially between 0.6 and 0.9, are coupled to effect the desired amplitude modulation.
(FR)On obtient une suppression efficace d"une bande laterale d"une onde porteuse, dont la frequence est modulee par un signal de bande de base, par modulation simultanee et directe de l"amplitude de l"onde porteuse avec le signal de bande de base lorsqu"un rapport (P, Fig. 2) entre des amplitudes minimum et des amplitudes maximum de l"onde porteuse est maintenu compris dans l"inegalite 0,6
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)