Patent ID: 11925404
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  G  H | IPC A  G  H

Claim 1:
2. The treatment system according to claim 1, wherein:
the power supply voltage generator is configured to generate the power supply voltage by superimposing a driving power supply voltage having a first frequency and a detection power supply voltage, the driving power supply voltage having a first frequency, the detection power supply voltage having a second frequency different from the first frequency,
the heater resistance detector includes:
a current detector configured to detect the current flowing through the detection resistor; and
a filter configured to remove a component of the first frequency from a detection value obtained by the current detector and extract a component of the second frequency,

the heater resistance detector is configured to detect an alternating-current (AC) component, which is different than a direct current (DC) component, from the current flowing through the detection resistor, the DC component changing in accordance with a modulation of the power supply voltage, the AC component changing in accordance with a temperature change of the heater resistor, and
the controller is configured to modulate the power supply voltage based on the AC component.