Digital to analog converter

Details Digital to analog converter Digital to analog converter

1984-12-24

1986-02-25

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

340347DA, 381 47, 375 34, G10L 100

Patent

active

045731888

ABSTRACT:
Techniques are disclosed for converting a multibit digital data word into a corresponding analog signal. The converter of the present invention utilizes information in a received signal plus noise associated with the information in such a manner as to reduce the mean squared error in the generated analog signal. The actual voltage associated with each bit position in the digital word is measured. In addition, a measurement of the signal-to-noise ratio is made. From these two measurements a processing device is adapted to generate a value corresponding to the statistical probability that the detected voltage level for each bit is a logical one. The probability values are used as scaling factors to modify the weights to be given each bit during the normal digital to analog conversion process.

REFERENCES:
patent: 3478266 (1969-11-01), Gardenhire et al.
patent: 3712959 (1973-01-01), Fariello
patent: 3745463 (1973-07-01), Klein
patent: 3825925 (1974-07-01), Drusch
patent: 4044309 (1977-08-01), Smith
patent: 4331837 (1982-05-01), Soumagne

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