Back to results
US 2026/0140201 A1Published application
Constant current device and failure detection method
AssigneeYokogawa Electric Corporation
InventorYouichi IWANO
Life of this patent
Estimating the term…
Abstract
An error amplifier generates an electric current signal that is constant electric current. A signal processing circuit inputs input voltage for generating an electric current signal having a target electric current value, to the error amplifier, and detects a failure by comparing a voltage value of voltage output from the error amplifier with a determination voltage value.
Claims12
A constant current device, comprising:
- an error amplifier that generates an electric current signal that is constant electric current;
- and
- a signal processing circuit that inputs input voltage for generating the electric current signal having a target electric current value to the error amplifier and detects a failure by comparing a voltage value of voltage output from the error amplifier with a determination voltage value.
A failure detection method for a constant current circuit including an error amplifier that generates an electric current signal that is constant electric current, wherein a signal processing circuit executes:
- inputting input voltage for generating the electric current signal having a target electric current value to the error amplifier;
- and
- detecting a failure by comparing a voltage value of voltage output from the error amplifier with a determination voltage value.
Dependencies are inferred from the claim text.