Boots – shoes – and leggings
Patent
1993-03-02
1995-01-10
Malzahn, David H.
Boots, shoes, and leggings
36472403, G06F 1531
Patent
active
053813561
ABSTRACT:
A cascade digital filer has a plurality of cascade-connecting pairs of integrators and differentiators to realize a transfer function obtained by cascade-connecting a plurality of moving average filters. Each of the integrators includes an adder which has a two's complement operating function which inverts its polarity on overflow. Each of the differentiators also includes an adder which has the same number of bits and the same function as does the adder of integrator. The adder in each of the integrators and differentiators prevents the output of the digital filter from diverging, thus resulting in normal filtered output.
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patent: 4972356 (1990-11-01), Williams
"A 16-bit Oversampling A-to-D Conversion Technology Using Triple-Integration Noise Shaping", IEEE Journal of Solid-State Circuits, vol SC-22, No. 6, Dec. 1987, by Yasuyuki Matsuya et al, pp. 921-928.
"An ISDN Echo-Cancelling Transceiver Chip Set for 2B1Qded U-Interface", IEEE Journal of Solid-State Circuits, vol. 24, No. 6, Dec. 1989, by Yutaka Takahashi et al. pp. 1598-1603.
Malzahn David H.
NEC Corporation
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