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

Claim 0:
1. A data storage device comprising:
a slider with a resistive temperature detector (RTD), the RTD having a first resistance electrically connected to a first amplifier circuit;
one or more processing devices configured to:
generate an alternating bias signal for biasing the first resistance, wherein the alternating bias signal generates a voltage bias across the first resistance, and wherein the alternating-bias signal has a first clock frequency;
modulate an input signal of the first amplifier circuit using the first clock frequency to generate a modulated signal, wherein the input signal corresponds to the voltage bias;
demodulate, 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 circuit is electrically coupled to the first amplifier circuit and configured to amplify the modulated signal; and
process the resistance detection signal to determine one or more of the first resistance and a change in a resistance value of the first resistance.