Correction for DC offset in A/D converters

Details Correction for DC offset in A/D converters Correction for DC offset in A/D converters

1989-10-23

1990-11-20

Shoop, Jr., William M.

Coded data generation or conversion

Converter compensation

341155, 341126, 341165, H03K 1302

Patent

active

049721895

ABSTRACT:
A means for correction for DC offset in an analog-to-digital converter which utilizes a hardware implemented iterative digital integration process. During the off time of an analog-to-digital converter thermal noise is digitized by the analog-to-digital converter and a specific number of least significant bits which are sufficient to handle the thermal noise levels are accumulated for a given number of samples. The accumulated sum of thermal noise samples is then converted into an analog signal and scaled by the number of samples taken so as to effectively find the average value from the sample collected. This scaled analog signal is then added to the thermal noise input signal wherein the process is repeated a predetermined number of times. Upon completion of the last iteration, the scaled analog signal which is representative of the DC offset inherent in the particular analog-to-digital converter is added to the true analog signal to be digitized.

REFERENCES:
patent: 407860 (1878-06-01), Araseki et al.
patent: 3786491 (1974-01-01), Carleton
patent: 3800236 (1974-03-01), Riethmuller et al.
patent: 3889255 (1975-06-01), Pettersen
patent: 4087796 (1978-05-01), Brown
patent: 4140925 (1979-02-01), Meyer
patent: 4164733 (1979-08-01), Landsburg et al.
patent: 4193066 (1980-03-01), Morrison et al.
patent: 4194186 (1980-03-01), Morrison et al.
patent: 4228423 (1980-10-01), Schwerdt
patent: 4229703 (1980-10-01), Bustin
patent: 4308524 (1981-12-01), Harrison et al.
patent: 4353060 (1982-10-01), Endoh et al.
patent: 4590458 (1986-05-01), Evans et al.
patent: 4647907 (1987-03-01), Storey
patent: 4771267 (1988-09-01), Russell, Jr. et al.
patent: 4896155 (1990-01-01), Craiglow

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