Boots – shoes – and leggings
Patent
1979-11-28
1981-06-09
Atkinson, Charles E.
Boots, shoes, and leggings
179 81R, 364745, G06F 739
Patent
active
042726484
ABSTRACT:
There is disclosed a digital gain control particularly adapted for use with digital signals propagating in a telephone line circuit. The gain control is positioned in the circuit to respond to a digital signal manifesting a plurality of words, each having a given number of bits N and indicative of a weighted value of an analog signal. The digital signal is multiplied by a word coefficient having a number of bits M indicative of a gain factor to be imparted to the digital signal. A product signal is provided containing M+N bits. The least significant bits are removed to provide an output signal of N bits possessing the desired gain. The discarded bits are employed via a feedback loop and are added to the next word product, which is then used to provide a next output signal. The feedback loop assures that each output signal is a close approximation to the input signal as gain controlled by the desired gain factor.
REFERENCES:
patent: 3594565 (1971-07-01), Ragen
patent: 3997770 (1976-12-01), Claasen et al.
patent: 4034196 (1977-07-01), Butterweck et al.
R. Kieburtz, "Rounding and Truncation Limit Cycles", IEEE Trans. on Acoustics, Sp. an Sig. Proc., Feb. 1974, p. 73.
Agrawal Bhagwati P.
Shenoi Kishan
Atkinson Charles E.
International Telephone and Telegraph Corporation
Kemeny E. S.
Morris Jeffrey P.
O'Halloran John T.
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