Telecommunications – Transmitter and receiver at separate stations
Patent
1996-05-06
1997-10-14
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 93, 455102, 375216, H04M 1100, H04Q 732
Patent
active
056781830
ABSTRACT:
A transmitting apparatus transmits at least one of a main and a supplementary modulated signal in response to a transmitting signal. The apparatus includes a first modulating circuit for modulating the transmitting signal in a main modulation system to produce the main modulated signal. The apparatus also includes a second modulating circuit for modulating the transmitting signal in a supplementary modulation system to produce the supplementary modulated signal. The apparatus further includes a selective supplying circuit for selectively supplying the transmitting signal to at least one of the first and second modulating systems. The apparatus also includes a control circuit connected to the first and second modulating circuits for controlling operation of the first and second modulating circuits and the selective supplying circuit.
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patent: 5446421 (1995-08-01), Kechkaylo
Kimura Shigeru
Uchida Wataru
Eisenzopf Reinhard J.
Kincaid Lester G.
NEC Corporation
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