Correction circuit for a floating-point amplifier

Details Correction circuit for a floating-point amplifier Correction circuit for a floating-point amplifier

1991-07-18

1993-06-15

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, H05G 160

Patent

active

052205894

ABSTRACT:
A medical imaging system has a source of X-rays and a detector which produces an electrical signal in response to X-rays from said source. A circuit amplifies the electrical signal by a gain factor that varies in response to a number received from a gain control circuit. A converter transforms an analog output signal from the amplifier into digital data. An error compensation circuit stores an offset correction value and a gain correction value for each value of the number from the gain control circuit. A pair of correction values is selected based on the gain of the amplifier for a given item of digital data. The selected offset correction value is summed with the item of digital data and the result is multiplied by the selected gain correction value. A circuit is provided to numerically integrate the corrected data.

REFERENCES:
patent: 4068306 (1978-01-01), Chen et al.
patent: 4278889 (1981-07-01), Erker
patent: 4815118 (1989-03-01), Acharya et al.

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