Digital switching apparatus for driving a load

Details Digital switching apparatus for driving a load Digital switching apparatus for driving a load

2007-09-04

2007-09-04

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S551000

Reexamination Certificate

active

11238411

ABSTRACT:
The present invention refers to a digital apparatus suitable for driving a load. The apparatus an input for receiving a voltage signal varied by an external disturbance and comprises means for sampling at least the external disturbance such as noise, and a driving circuit such as a pulse width modulator for driving the load with a suitable output voltage. The apparatus includes a control circuit suitable for generating digital commands representative of a desired output voltage of the apparatus. The apparatus also comprises digital correction circuit suitable for generating a correction signal on the basis of the difference between the value of the current sample and the value of the previous sample of at least the external disturbance. The output of the driving circuit is governed by the correction signal.

REFERENCES:
patent: 5055708 (1991-10-01), Sugawara
patent: 5933453 (1999-08-01), Lewison
patent: 5952738 (1999-09-01), Miller
patent: 6653960 (2003-11-01), Mitamura et al.
patent: 6784648 (2004-08-01), Mitamura et al.

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