Automatic attenuation circuit

Details Automatic attenuation circuit Automatic attenuation circuit

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.
patent: 3835400 (1974-09-01), Briscoe
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

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