Digital filter with protection against overflow oscillation

Details Digital filter with protection against overflow oscillation Digital filter with protection against overflow oscillation

2006-01-31

2006-01-31

Malzahn, D. H. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S498000, C708S552000

Reexamination Certificate

active

06993545

ABSTRACT:
A digital filter having the capability to completely prevent the digital filter from generating the overflow oscillation by detecting positive and negative overflow propagating one or a plurality of bits by means of an overflow detecting circuit. When overflow is detected, a clipping circuit serves to fix the output signal to a positive maximum value or a negative maximum value.

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IEEE Journal of Solid-State Circuits, “A Subscriber Digital Signal Processor LSI for PCM Applications”, vol. 23, No. 3, p. 838, Fig. 4; K. Yamakido et al.; Jun. 1988.
Rejection Notice mailed on Jul. 5, 2005, corresponding to the related Japanese Patent Application No. 2000-295206 as received from the Japanese Patent Office.

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