Logarithmic analog-to-digital converter

Details Logarithmic analog-to-digital converter Logarithmic analog-to-digital converter

1977-09-23

1979-02-27

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1302

Patent

active

041421850

ABSTRACT:
Method and apparatus for performing a logarithmic analog-to-digital conversion in which the logarithm of an input signal is determined via a successive approximation technique. In operation, a reference signal is multiplied by a series of exponentially related factors to produce a series of intermediate trial signals. The input and intermediate signals are compared and each intermediate signal which is smaller than the input signal becomes the new reference signal. The series of binary comparator output signals for each intermediate signal is the logarithm of that input signal.

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patent: 3588881 (1971-06-01), Gordon
patent: 3662347 (1972-05-01), Fox
patent: 4048562 (1977-09-01), Haselwood

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