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| Lucien Lévy |
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| Paris March
11, 1892 in Paris May 24, 1965 |
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| Biographical
notes |
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| He
graduated in engineering at the Ecole Supérieure de Chimie
et
Physique Paris at the end of the First World War. In 1916 is
responsible for laboratories radio on the Eiffel Tower. In June of that
year produces a transmitter for broadcasting by 1.5 Kw always on the
tower. |
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During
this period studied modulation amplitude with ultrasonic frequencies to
obtain secret communications. To achieve this oscillator uses
an
ultrasonic frequency. |
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| Thanks
to these requirements
sees the possibility of using a local oscillator on the receiver
getting agreement on a carrier and an agreement on the frequencies
generated by the beat frequency range. |
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| In
August 1917 deposits
patent No. 493660 in which demonstrates the feasibility of using radio
receiver in a local oscillator, which improves the performance of the
same especially for high frequencies.
A subsequent patent filed on October 1, 1918 with the number 506297
exposes diagram of a receiver superhetherodyne.
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