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G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
G06G7/48—Analogue computers for specific processes, systems or devices, e.g. simulators
G06G7/75—Analogue computers for specific processes, systems or devices, e.g. simulators for component analysis, e.g. of mixtures, of colours
G—PHYSICS
G06—COMPUTING OR CALCULATING; COUNTING
G06G—ANALOGUE COMPUTERS
G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
G06G7/32—Arrangements for performing computing operations, e.g. operational amplifiers for solving of equations or inequations; for matrices
G06G7/34—Arrangements for performing computing operations, e.g. operational amplifiers for solving of equations or inequations; for matrices of simultaneous equations