Device for amplifying digital signals

Details Device for amplifying digital signals Device for amplifying digital signals

1998-08-05

2000-10-31

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including class d amplifier

330 10, H03F 3217

Patent

active

061408751

ABSTRACT:
The device for amplifying digital signals includes an input electrode (10) for receiving a digital signal. The device further includes a subtraction unit (12) for subtracting at least two signals from each other, and the input electrode (10) is coupled to a first input (11) of the subtraction unit (12). The device also includes a time-continuous loop filter (14) coupled to an output of the subtraction unit (12), and a time-continuous comparator (16) and a switching amplifier (18) which are coupled in cascade to the time-continuous loop filter. The device additionally includes an output electrode (20) which is coupled to an output (22) of the switching amplifier (18). This output (22) of the switching amplifier (18) is also coupled to a second input (13) of the subtraction unit (12).

REFERENCES:
patent: 4059807 (1977-11-01), Hamada
patent: 4554512 (1985-11-01), Aiello
patent: 5410592 (1995-04-01), Wagner et al.
patent: 5521549 (1996-05-01), Nelson
patent: 5617058 (1997-04-01), Adrian et al.
patent: 5815581 (1998-09-01), Andersson
"A Sigma-Delta Power Amplifier for Digital Input Signals" by Audio Engineering Society, held from Mar. 22 to Mar. 25, 1997.

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