High-speed bipolar logarithmic analog-to-digital converter

Details High-speed bipolar logarithmic analog-to-digital converter High-speed bipolar logarithmic analog-to-digital converter

1983-10-11

1985-07-16

Dobeck, B.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, H03K 1302

Patent

active

045299668

ABSTRACT:
A high-speed bipolar logarithmic analog-to-digital (A/D) converter outputs signed binary number proportional to the logarithm of a bipolar analog input signal. A log converter is followed by a level shifting amplifier to center the output of the log converter on a temperature compensating reference. The reference voltage from the temperature compensating reference is used by a linear A/D converter to set the end points of the converter range. A code converter follows the A/D converter if a uniform absolute value coding is desired. Limiting the number of least significant bits (LSB) used to those representing the range of usable converter operation completes the device.

REFERENCES:
patent: 3653033 (1972-03-01), Bonami et al.
patent: 3811125 (1974-05-01), Schumann
patent: 3940760 (1976-02-01), Brokaw
patent: 4005410 (1977-01-01), Michael et al.
patent: 4156233 (1979-05-01), Puckette
patent: 4168492 (1979-09-01), Uya
patent: 4275386 (1981-06-01), Michel et al.
patent: 4490713 (1984-12-01), Mrozowski et al.

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