Analog-to-digital converter with explicit interpolation

Details Analog-to-digital converter with explicit interpolation Analog-to-digital converter with explicit interpolation

1982-06-03

1984-07-17

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, H03K 1302

Patent

active

044608918

ABSTRACT:
An analog-to-digital converter operable in sequential phases and including a main digital-to-analog converter (DAC) controlled by a successive-approximation-register to develop a first digital signal representing a first approximation of the analog input signal. In subsequent phases, the residual difference between the anolog input signal and the output of the main DAC is converted to a second digital signal representing the proportion which the residual signal bears to the difference between the first analog output of the main DAC and a second analog output of that DAC after it has been incremented by one least-significant-bit beyond the first DAC input developed in the successive-approximation phase. This proportioning operation is in one embodiment performed by a multiplying A-to-D converter, and in other embodiments is performed by an interpolation DAC. Microcomputer control of the various operations is disclosed.

REFERENCES:
patent: 3541315 (1970-11-01), Naydan
patent: 3646586 (1972-02-01), Kurz
patent: 3938188 (1976-02-01), Lucas

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