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de Riviere; Charles
Paris, FR
No. of patents:

Patent Number Title Of Patent Date Issued
4511864 Modulating device for a single-sideband modulation system April 16, 1985
The modulating device reduces the number of electronic functions required for generating an SSB signal which is subjected to SSB peak-limiting in a transmitter which is selectively operable either on the upper channel or on the lower channel. By means of a mixer, the signal delivered by
4326293 Transmitter-receiver with automatic alternation control April 20, 1982
Prior to each voice activity period, the transmitter supplies a digital preamble for coding the speech signal levels and during these periods high frequency signals modulated in substantially constant amplitude, but transmits nothing other than said preamble and said periods. On receptio
4305154 Transceiver December 8, 1981
The transceiver according to the invention is controlled by an automatic alternation device in order to permit transmission solely when voice signals are to be transmitted and when the receiver does not receive such signals. On transmission, the transmitter supplies constant amplitud

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