Patent ID: 11886264
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 16:
17. The method of claim 16, wherein detecting, via the analog detection circuit, whether a slew rate of the sense signal exceeds a reference slew rate comprises:
generating a first voltage, a second voltage and a third voltage that each track the sense signal over a sample time of a detection window, the first voltage, the second voltage and the third voltage being offset from one another over the sample time, with the second voltage being between the first voltage and the third voltage;
continuing to track, via the first voltage and the third voltage, the sense signal over a hold time of the detection window which follows the sample time;
holding a level of the second voltage at the end of the sample time over the hold time;
indicating a voltage overshoot condition on the USB voltage bus power line if the first voltage exceeds the held level of the second voltage at any point during the hold time; and
indicating a voltage undershoot condition on the USB voltage bus power line if the third voltage drops below the held level of the second voltage at any point during the hold time.