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

Claim 12:
13. The device as claimed in claim 2, further comprising: a first logic circuit, a second logic circuit, and a MOSFET, wherein:
said first logic circuit is connected in series between the output terminal of said first operational amplifier and the gate of said MOSFET array, wherein the first input terminal of said first logic circuit is connected to the output terminal of said first operational amplifier;
the second input terminal of said first logic circuit is connected to said tuning control device;
said second logic circuit has its input terminal connected to said tuning control device and its output terminal connected to the gate of said MOSFET;
the drain of said MOSFET is connected to the source of said MOSFET array, and the source of said MOSFET receives a detuning voltage signal;
when said tuning control device outputs a high level, said first logic circuit outputs an output voltage of said first operational amplifier to the gate of said MOSFET array, and said MOSFET array is connected so that the source of said MOSFET array outputs a constant preset current to the body coil of said MRI system; meanwhile, said second logic circuit is disconnected so that said MOSFET is disconnected; and
when said tuning control device outputs a low level, said first logic circuit outputs a low level to the gate of said MOSFET array, and said MOSFET array is disconnected and the source of said MOSFET array has no current output; meanwhile, said second logic circuit is connected so that said MOSFET is connected and the detuning voltage signal is output to the body coil of said MRI system through said MOSFET.