Resistance plates and variable brush autotransformers were largely purchased from Ward Leonard; magnetic amplifiers from General Electric.
12.
Like the magnetic amplifiers, Johnson's " Neuron " design could be used to control several different inputs.
13.
Magnetic amplifiers and cameras had the additional capability to monitor the recorded sound by a return signal from the camera.
14.
Similar to magnetic core memory, or " cores ", magnetic amplifiers used small toroids of ferrite as a switching element.
15.
One advantage to magnetic amplifiers is that they are open in the center and several input lines can be threaded through them.
16.
This computer used magnetic amplifiers, not transistors, because the transistors then available had highly variable characteristics and were not sufficiently reliable.
17.
American interest in magnetic amplifier technology increased again after findings in investigations of the fire control system of " Prinz Eugen ".
18.
Magnetic amplifiers were used extensively as the switching element in early switched-mode ( SMPS ) power supplies, as well as in lighting control.
19.
Modulation or telegraph keying of the radio frequency energy was done by a magnetic amplifier, which was also used for amplitude modulation and voice transmissions.
20.
Unlike digital logic based on tubes or transistors, which uses defined voltages to represent values, magnetic amplifiers based their logic values on current flows.
