IIR type digital filter

Details IIR type digital filter IIR type digital filter

1995-12-13

1998-04-14

Malzahn, David H.

Boots, shoes, and leggings

G06F 1710

Patent

active

057400911

ABSTRACT:
In addition to an output Y(n) of an adding device, a dither output of a dither generating circuit is supplied to an adding device. The output Y(n) of the adding device is added to a bit that is one bit lower than the LSB of the shortest word length of the hardware (namely, the place of LSB/2). The output of the adding device is supplied to a delay device. In other words, when the shorter word length is 32 bits corresponding to the word length of the RAM of the delay device, the dither is added to the bit 33. In the data Y(n) to which the dither has been added, the low order bits thereof are truncated corresponding to the word length of the delay device. The resultant data is supplied as next timing output data Y'(n-1) to the delay device and stored therein.

REFERENCES:
patent: 4920507 (1990-04-01), Takeda
patent: 5189634 (1993-02-01), Eberle et al.

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