1
Marco De Bortoli, Adler Tofanelli, Luigi Varetto: System for measuring amplitude of noise-contaminated periodic signal. Cselt Centro Studi e Laboratori Telecomunicazioni S p A, Karl F Ross, Herbert Dubno, January 7, 1986: US04563637 (12 worldwide citation)

In order to measure the amplitude of a periodic signal of known frequency which may be heavily contaminated by noise and whose phase is not known at the point of measurement, e.g. at an output end of an optical fiber, two samples are periodically taken in every cycle at instants spaced apart by a qu ...


2
Carlo M Bruno, Gianfranco Panarotto, Adler Tofanelli: System for bidirectional digital transmission with echo cancellation. Cselt Centro Stude e Laboratori Telecomunicazioni S p A, Karl F Ross, Herbert Dubno, August 11, 1987: US04686703 (9 worldwide citation)

A bidirectional transmission system with echo cancellation allows simultaneous interchange of digital information between an exchange and subscribers on a single transmission line. Data flows are transmitted by packets separated by short silence intervals within which clock signals are extracted and ...


3
Fabrizio Gagliardi, Carlo M Bruno, Adler Tofanelli: Digital circuit for extracting synchronism signals from a serial flow of coded data. Sip Societa Italiana Per L Esercizio Telefonico P A, Karl F Ross, Herbert Dubno, June 23, 1987: US04675885 (7 worldwide citation)

The digital circuit extracts synchronism signals from a serial flow of coded data according to a process which uses a phaselocked loop where the different level transitions of the signal received are separately considered and a phase is determined for each type, the latter being compared with a spec ...


4
Renato Ambrosio, Carlo Bruno, Giorgio Paschetta, Adler Tofanelli: Echo canceller for bidirectional digital transmission. SIP Societa Italiana per l Esercizio delle Telecomunicazioni P A, Herbert Dubno, July 5, 1988: US04755984 (4 worldwide citation)

The echo canceller for bidirectional digital transmission systems cancels the echo queues of a desired number N of digital symbols, transmitted on the line in the last N signalling periods. It consists of a part which effects very simply the summation of the last N transmitted symbols, so as to ease ...


5
Renato Ambrosio, Alberto Brosio, Alfredo Fausone, Adler Tofanelli: Bidirectional digital transmission system with echo-cancellation. SIP Societa Italiana per l Esercizio Telefonico p a, Karl F Ross, Herbert Dubno, December 15, 1987: US04713803 (2 worldwide citation)

A bidirectional digital transmission system with echo-cancellation allows the measurement of the received data signal and the automatic adaptation of the attenuator and of the line equalizer. They are implemented by using circuits already present in a conventional system, in addition to auxiliary ci ...