| |
|
| | | |
|
|
|
|
| |
| | | |
| |  |
Lucien
Lévy | 
|
|
|
| |
|
|
| Paris March
11, 1892 in Paris May 24, 1965 |
|
1818 Superheterodine |
|
| | | | | |
| |
|
|
|
In 1916 is responsible for laboratories military
radio on the Eiffel Tower. In
June of that year produces a transmitter for broadcasting by 1.5 Kw
always on the tower. This period studied modulation amplitude with
ultrasonic frequencies to obtain secret
communications. For
get this oscillator uses an ultrasonic frequency.. 1917 deposits
patent FR493660
(Système de transmission électrique à
distance,
applicable particulièrement à la
télégraphie et téléphonie
sans fil ) in
which demonstrates the feasibility of using radio
receiver in a local oscillator which improves the performance of the
same especially for high frequencies. Next a patent filedon October 1,
1918 with
the number FR506297
( receiver system suppressors selector for telegraphy and telephony and
wireless) exposes diagram of a receiver superhetherodyne.
|
| | | | | | |
| |
|
|  |
|
| |
| |
