Patent ID: 11959983
Assignee: SIEMENS HEALTHINEERS AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 3:
4. The device as claimed in claim 1, further comprising: a second operational amplifier, a third resistor, a fourth resistor, a third operational amplifier, a fifth resistor, and a sixth resistor, wherein:
the non-inverting input terminal of said second operational amplifier is connected to the first connection terminal of said first resistor group through said third resistor and is meanwhile grounded through said fourth resistor;
the inverting input terminal of said second operational amplifier is connected to the second connection terminal of said first resistor group;
said third operational amplifier has its non-inverting input terminal connected to the second connection terminal of said first resistor group;
the inverting input terminal of said third operational amplifier is connected to the first connection terminal of said first resistor group through said fifth resistor and is meanwhile grounded through said sixth resistor;
the resistance values of said third resistor and said fourth resistor meet a requirement that an output voltage of said first LDO*resistance value of said fourth resistor/(resistance value of said third resistor+resistance value of said fourth resistor)=preset first current threshold*resistance value of body coil+voltage difference between drain and source of said MOSFET array;
the resistance values of said fifth resistor and said sixth resistor meet a requirement that an output voltage of said first LDO*resistance value of said sixth resistor/(resistance value of said fifth resistor+resistance value of said sixth resistor)=preset second current threshold*resistance value of the body coil+voltage difference between the drain and the source of said MOSFET array; and
according to the output signals of said second operational amplifier and said third operational amplifier), if the current input to the body coil is not smaller than the preset second current threshold and is not greater than the preset first current threshold, it is determined that the current input to the body coil is normal; and if not, it is determined that the current input to the body coil is abnormal; the preset second current threshold is smaller than the preset first current threshold.