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Historical Development of Magneticamplifier Circuits
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a-c bias a-c load a-c load windings a-c windings actual magnitude additional d-c AIEE Technical Paper AIEE Transactions alternating current ampere-turns amplifier circuits arrangement basic bias circuit bias windings bridge circuit bridge-type circuit Fig circuit of Fig control circuit control current control current Ic control voltage Ec control windings Nc d-c component d-c control windings d-c flux d-c magnetization d-c or a-c devices direct current duodirectional dynamic braking effect Electrical Engineers electronic amplifier external-feedback circuit Figure flux-gate magnetometer frequency full-wave fundamental fundamental-frequency impedance input load current load resistor RL magnetic amplifiers magnetic servo amplifier magnetic-amplifier circuits magnetometer magnetomotive force means measurements motor Mumetal nonfeedback number of turns Orthonol output current potentiometer power-supply transformer power-supply voltage EP resistance reversible saturable reactor saturable-reactor circuit saturable-reactor elements self-balancing series resistor servomechanisms shown in Fig Swiss patent tape cores Transductor transfer characteristic United States patent variable W. A. Geyger waveshape zero