| 摘要 |
Voltmeter of root-mean-square voltage includes connected in series scaling transformer, broadband amplifier, linear transformer of root-mean-square voltage, measuring device. Additionally there is included transformer of amplitude voltage, comparator, source of support voltage, indicator of overload, high-frequency amplifier, supplementary linear transformer of root-mean-square voltage, voltage divider, indicator of frequency error, at that output of scaling transformer is connected to input of transformer of amplitude voltage and input of high-frequency amplifier output of which through supplementary linear transformer of root-mean-square voltage is connected to the first input of voltage divider, its second input is connected to output of linear transformer of root-mean-square voltage, and output – to indicator of frequency error, output of transformer of amplitude voltage is connected to the first input of comparator to the second input of which source of support voltage is connected, and output of comparator is connected to indicator of overload. |
