Boots – shoes – and leggings
Patent
1979-05-23
1981-06-30
Atkinson, Charles E.
Boots, shoes, and leggings
364571, 360 67, 307264, 330144, 330284, H03G 320
Patent
active
042766044
ABSTRACT:
An automatic attenuation circuit comprises a variable loss attenuation circuit that drives circuitry for detecting the level of the output signal of the variable loss attenuation circuit. The level detector drives a periodically reset integrator, which in turn feeds a signal to a comparator, also responsive to a reference. A control circuit responsive to the output signal of the comparator controls the attenuation factor of the variable loss attenuation circuit. The control circuit, which may be a microcomputer, is so programmed that the attenuation factor of the variable loss attenuation circuit is stepwisely increased until the level of the output signal of the variable loss attenuation circuit becomes equal to or below a predetermined level.
REFERENCES:
patent: 3132308 (1964-05-01), Munson et al.
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patent: 3904971 (1975-09-01), Delagrange
patent: 3969683 (1976-07-01), Fabricius
patent: 4016483 (1977-04-01), Rudin
patent: 4016557 (1977-04-01), Zitelli et al.
patent: 4091380 (1978-05-01), Yu
patent: 4112384 (1978-09-01), Buchberger
Kitamura Masatsugu
Onoye Hideo
Yamazaki Masami
Atkinson Charles E.
Chin Gary
Victor Company of Japan , Limited
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