Patent ID: 11921241
Assignee: FUJIFILM HEALTHCARE CORPORATION
Field: Medical technology (Instruments)
Classification: CPC B  G  A | IPC G

Claim 3:
4. The ultrasonic probe according to claim 1, wherein:
the variable resistor negative feedback unit is a first N-channel or a first P-channel field effect transistor, and the control terminal of the variable resistor negative feedback unit is a gate terminal of the first N-channel or the first P-channel field effect transistor;
the variable resistor of the floating voltage circuit is a second N-channel or a second P-channel field effect transistor having a gate connected to a drain, the direct current signal is fed to the second N-channel or the second P-channel field effect transistor, and a gate-to-source voltage of the second N-channel or the second P-channel field effect transistor is the floating voltage; and
the control circuit inputs the signal that has been level shifted by the floating voltage based on the added signal output of the adding circuit to the control terminal of the variable resistor negative feedback unit in each of the plurality of low-noise amplifier circuits.