Magnetic characteristic determining device for e.g. electromagnet, has bridge circuit comprising amplifier and digital to analog converters that are designed to perform multiplying function

摘要

The device has a digital to analog converter (4) comprising an output connected with two inputs of an amplifier (1). A bridge circuit (7) has two digital to analog converters (8) and an amplifier (9), where an output of the converters is connected with an input of the amplifier (9). The bridge circuit has a third digital to analog converter (11) comprising an output connected with another input of the amplifier (9). The three digital to analog converters (8, 11) are designed to perform multiplying function.