Method of converting analog signals into digital signals and sys

Details Method of converting analog signals into digital signals and sys Method of converting analog signals into digital signals and sys

1988-11-16

1990-06-26

Shoop, Jr., William

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341155, 341156, 341139, H03M 118

Patent

active

049375792

ABSTRACT:
The same analog signal is inputted to an 8-bit AD converter and to a 4-bit AD converter to obtain an 8-bit digital data and a 4-bit digital data for the same sample value of the analog signal. Values of the 8-bit digital data and 4-bit digital data are compared with each other. The 8-bit digital data is outputted as a digital signal for the sample value of the analog signal when a difference between these values is not greater than one-half the quantity that corresponds to the least significant bit of the 4-bit digital data, and the 4-bit digital data is outputted as a digital signal for the sample value of the analog signal in other cases. There is realized AD conversion which operates apparently at high speeds maintaining high accuracy.

REFERENCES:
patent: 3909597 (1975-09-01), Dunn et al.
patent: 4345241 (1982-08-01), Takeuchi et al.
patent: 4398179 (1983-08-01), Kaneko
patent: 4456904 (1984-06-01), van de Grift
patent: 4654634 (1987-03-01), Thong et al.

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