Analog-to-digital conversion system having simultaneously auto-a

Details Analog-to-digital conversion system having simultaneously auto-a Analog-to-digital conversion system having simultaneously auto-a

1987-02-09

1989-03-07

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341126, 341155, H03M 118

Patent

active

048110183

ABSTRACT:
An analog-to-digital conversion system for converting an analog signal to a digital signal for recording is configured to detect a low level period of the analog signal, amplify a low noise in the analog signal in the detected period by a predetermined multiplying ratio or by an amount corresponding to the signal amplitude, and subtract from the converted digital signal a number of bits corresponding to the amplification degree in the same period after analog-to-digital conversion, so as to reduce the influence of a noise entering in the analog signal before analog-to-digital conversion.

REFERENCES:
patent: 3509558 (1970-04-01), Cancro
patent: 3603972 (1971-09-01), Vanderford
patent: 3879724 (1975-04-01), McDonald
patent: 3919657 (1975-11-01), Howlett et al.
patent: 3972626 (1976-08-01), Laskowsi
patent: 4739307 (1988-04-01), Marcovici et al.

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