Patent ID: 11961542
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 18:
19. Control circuitry comprising:
a first amplifier circuit;
a second amplifier circuit;
a source for biasing a first resistance of a resistive temperature detector (RTD) with a voltage bias, wherein the first resistance is electrically coupled to the first amplifier circuit on a low frequency (LF) path and the second amplifier circuit on a high frequency (HF) path;
a pulse generator for adding a bias pulse on the HF path to generate a HF resistance detection signal, wherein the second amplifier circuit is biased using the voltage bias and the bias pulse;
a clock coupled to the first amplifier circuit on the LF path, wherein the clock chops a LF signal at the first amplifier circuit at a first clock frequency; and
a demodulator demodulating, the chopped LF signal on the LF path using the first clock frequency to generate a LF resistance detection signal.