| 摘要 |
FIELD: physics. ^ SUBSTANCE: instrumental transformer of alternate current includes primary and secondary windings placed at the closed ferromagnetic core, first operational amplifier with its inversion input connected to its output by the first resistor, second operational amplifier with its inversion input connected to the first output of the second resistor and, via condenser, to the second amplifier output, while inversion input of the first operational amplifier is connected to the first output of secondary winding. The second output of the second winding is connected to the common wire, and the second output of the second resistor is connected directly to the device output and first operational amplifier output, non-inversion input of which is connected to the second operational amplifier output, non-inversion input of which is connected to the common wire. ^ EFFECT: simplification of the device and increase in measurement accuracy. ^ 1 dwg |
