Implicit ratio computer for sequential signals
First Claim
1. In an electrical signal ratioing circuit for a source delivering an electric analog signal pulse sequence comprising measured parameter signals A1, A2 . . . An, and at least one reference signal R,signal gating and timing means having signal identification means maintaining time coordination with said signal pulse sequence, and gate actuating means responsive to said signal identification means actuating, for predetermined time durations, the respective gates corresponding to said signals A1, A2 . . . An, and, Ran amplifier which imparts a gain G to said signals,a gated integrator which, during the gated period wherein said reference signal R is delivered, has a first input terminal receiving the sum of said signal pulse sequence of a given polarity from said amplifier and a substantially constant d-c reference voltage K of opposite polarity, and a second input terminal connected to ground,means supplying said integrator output to control a gain -- determining resistance for said amplifier, andindividual parallel sampling circuits gating the individual signal ratios KA1 /R, KA2 /R . . . KAn /R during the successive time periods wherein each is output from said amplifier.
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Abstract
An electrical signal ratioing circuit for a source delivering an electric analog pulse signal sequence having compensating means for removing the effects of background influences, such as amplifier signal offsets and extraneous illumination, and integrating means eliminating the effect of line voltage variations and changes in optical and electrical system gains on the ratios so produced.
21 Citations
6 Claims
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1. In an electrical signal ratioing circuit for a source delivering an electric analog signal pulse sequence comprising measured parameter signals A1, A2 . . . An, and at least one reference signal R,
signal gating and timing means having signal identification means maintaining time coordination with said signal pulse sequence, and gate actuating means responsive to said signal identification means actuating, for predetermined time durations, the respective gates corresponding to said signals A1, A2 . . . An, and, R an amplifier which imparts a gain G to said signals, a gated integrator which, during the gated period wherein said reference signal R is delivered, has a first input terminal receiving the sum of said signal pulse sequence of a given polarity from said amplifier and a substantially constant d-c reference voltage K of opposite polarity, and a second input terminal connected to ground, means supplying said integrator output to control a gain -- determining resistance for said amplifier, and individual parallel sampling circuits gating the individual signal ratios KA1 /R, KA2 /R . . . KAn /R during the successive time periods wherein each is output from said amplifier.
Specification