Analog-to-digital conversion method and an analog-to-digital con

Details Analog-to-digital conversion method and an analog-to-digital con Analog-to-digital conversion method and an analog-to-digital con

1986-07-21

1988-01-26

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

364577, 340347AD, H03M 112

Patent

active

047219440

ABSTRACT:
An A/D conversion method including the steps of storing digital voltage values obtained through an A/D conversion of divided voltages obtained by dividing an analog voltage in a predetermined voltage range into a predetermined number of different dividing ratios by an A/D converter and digital data for calculating digital output data for the A/D conversion of an input voltage in combination with the digital voltage values in a memory, converting the input voltage into a corresponding digital input value through A/D conversion, deciding upon a voltage division including the digital input value among divisions demarcated by the digital voltage values by sequentially comparing the digital voltage values with the digital input value, deciding which of a pair of the digital voltage values demarcating the division selected through the prior decision is the approximate value of the digital input value, updating the divided voltage corresponding to the digital voltage value through A/D conversion to provide a representative demarcating value, deciding upon a division including the digital input value by comparing the updated representative demarcating value and the digital input value to update one of the divided voltages corresponding to one of the demarcating values paired with the representative demarcating value through A/D conversion and providing a digital signal corresponding to a digital output value through linear interpolation on the basis of the digital input value, the updated demarcating value, and an appropriate data corresponding to the updated demarcating value of the selected division among the digital data and an A/D converter utilizing the above method.

REFERENCES:
patent: 4300203 (1981-11-01), Brown
patent: 4338589 (1982-07-01), Engel
patent: 4364027 (1982-12-01), Murooka
Gutman, "EDN", Jan. 5, 1979, pp. 58, 61, 62.

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