Back to results
US 5,963,597 AGranted
Data transmission apparatus
AssigneeSony Corporation
InventorHiroshi Okawa
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSony Corporation
InventorHiroshi Okawa
Estimating the term…
A data transmission apparatus applicable to transmission of data by the use of a cable of a television camera system or the like and capable of ensuring simplified exact demodulation of data transmitted through quadrature modulation. The apparatus comprises a demodulator for outputting detection signals of the quadrature-modulated signal based on reference signals whose phases are each different by a predetermined value from an I-axis reference signal and a Q-axis reference signal in the quadrature modulation; a signal level corrector for correcting the signal levels of the detection signals; and a signal converter for converting the output signals of the signal level corrector to detection signals based on the I-axis and Q-axis reference signals. An equalizer circuit is further included in the apparatus for adaptively equalizing the output signals of the signal converter or the output signals of the signal level corrector. The quadrature-modulated signal is inputted via a coaxial cable, and the above predetermined value of the phase difference is an angle of 45 degrees.
A data transmission apparatus for demodulating data from a quadrature-modulated signal, comprising:
A data transmission apparatus for demodulating data from a quadrature-modulated signal, comprising:
A data transmission apparatus for demodulating data from a quadrature-modulated signal, comprising:
Dependencies are inferred from the claim text.