Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1996-02-29
1998-06-16
Coles, Sr., Edward L.
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375247, 370537, 370540, H04K 110
Patent
active
057683166
ABSTRACT:
A mixing circuit for synthesizing plural .DELTA..SIGMA. modulated data generated simultaneously with a bit rate F to single mixed data includes a slot determining section for dividing time length corresponding to 1-bit period of the .DELTA..SIGMA. modulated data into a number N which is of the same number as the plural .DELTA..SIGMA. modulated data, and a time division multiplex section for assigning in order the plural .DELTA..SIGMA. modulated data to the 1-bit period at a bit rate N*F on a time shared basis. The obtained mixed data can be converted to linear PCM data with a single decimation circuit. By increasing the bit rate of the mixed data by N times the bit rate F of the .DELTA..SIGMA. modulated data, a total gain can be maintained at a constant value irrespective of a change in the number of data to be synthesized.
REFERENCES:
patent: 4951052 (1990-08-01), Jacob et al.
patent: 4987570 (1991-01-01), Almond et al.
patent: 5541582 (1996-07-01), Wagner et al.
patent: 5627536 (1997-05-01), Ramirez
Coles Sr. Edward L.
Nguyen Madeleine An
Yamaha Corporation
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