Pulse or digital communications – Apparatus convertible to analog
Reexamination Certificate
2005-09-13
2005-09-13
Ha, Dac V. (Department: 2634)
Pulse or digital communications
Apparatus convertible to analog
C375S295000, C375S316000
Reexamination Certificate
active
06944212
ABSTRACT:
A base band modulation system. There is a microcontroller which receives and manipulates a digital data stream to provide for addition of miscellaneous flag data. There is a continuously variable slope delta demodulator (CVSD) to receive the manipulated data stream and convert this to an analog signal. There is also a second microprocessor to receive the same.
REFERENCES:
patent: 4860312 (1989-08-01), van den Heuvel et al.
patent: 5712866 (1998-01-01), Stein et al.
patent: 5818813 (1998-10-01), Saito et al.
patent: 6064699 (2000-05-01), Law
Ha Dac V.
Hughes Robert B.
Hughes Law Firm PLLC
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