Patent ID: 11874182
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A method for operating a data storage device comprising:
generating an alternating bias signal for biasing a first resistance of a resistive temperature detector (RTD), wherein the alternating-bias signal generates a voltage bias across the first resistance, and wherein the alternating bias signal has a first clock frequency;
modulating, using the first clock frequency, an input signal of a first amplifier circuit to generate a modulated signal, wherein the input signal corresponds to the voltage bias;
demodulating, at an output of a second amplifier circuit, an amplified modulated signal using the first clock frequency to generate a resistance detection signal, wherein the second amplifier is electrically coupled to the first amplifier circuit and configured to amplify the modulated signal; and
processing the resistance detection signal to determine one or more of the first resistance and a change in a resistance value of the first resistance.