Autonomous gain normalization circuit

Details Autonomous gain normalization circuit Autonomous gain normalization circuit

1991-11-26

1992-11-17

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307359, 307264, H03K 5153, G06G 712

Patent

active

051646200

ABSTRACT:
An autonomous gain normalization circuit has a fixed capacitor for receiving a current signal such as that output by an infrared detector element and a plurality of switchable capacitors connectable in parallel with the fixed capacitor. The first switchable capacitor preferably has a capacitance of approximately one half of that of the fixed capacitor and each successive capacitor preferably has a capacitance of approximately one half that of the preceding capacitor. An analog-to-digital converter converts the voltage stored upon the capacitors into a first digital word. During a normalization cycle, the most significant bits of the first digital word cause connection of the switchable capacitors in parallel with the fixed capacitors such that second digital word having a value within a desired range is then provided by the analog-to-digital converter. Thus, the outputs of a plurality of such autonomous gain normalization circuits are normalized to a common range of values to facilitate signal processing thereupon.

REFERENCES:
patent: 4633086 (1986-12-01), Parrish
patent: 4694208 (1987-09-01), Szabo et al.
patent: 4785253 (1988-11-01), Hughes
patent: 4786831 (1988-11-01), Morse et al.
patent: 4804863 (1989-02-01), Welland et al.
patent: 4894791 (1990-01-01), Jiang et al.
patent: 4914319 (1990-04-01), Hashimoto
patent: 5039879 (1991-08-01), Parrish

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