| 摘要 |
Device for measurement of parameters of alternating magnetic fields that has resistive divider and measuring coil loaded to inverting amplifier output of which through the first resistor if connected to its inverting input, at that its non-inverting input is connected to middle point of resistive divider, second output of one of resistors is connected to output of amplifier and second and of second resistor – to common bus, at that ratio of values of resistors of arms of divider is smaller than ratio of values of internal active resistance of measuring coil to value of first resistor, at that additionally it has connected in series blocks of broadband filters, block of matching amplifier, block of output amplifier, block of control resistive divider and indicator block connected to output of amplifier, control block, first, second, third. Fourth outputs of which are connected to control inputs of blocks of broad-band filters, respectively, matching amplifier, indicator and control resistive divider that is arranged as resistor magazine output of which is connected to non-inverting input of amplifier and through reference resistor – to common bus. |
