Patent ID: 11868565
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 11:
12. A method comprising:
receiving, by a sensing channel comprising an attenuator, an input signal from at least one sense electrode of a capacitive sensing device;
generating, using a signal generator, a rectified sinusoidal signal to modulate a gain of the attenuator;
multiplying, by the attenuator, the input signal with the rectified sinusoidal signal to reduce a noise characteristic of the input signal;
generating a transmit drive signal based, at least in part, on one or more scanning parameters of a scan sequence, the transmit drive signal being provided to one or more transmit electrodes of the capacitive sensing device;
generating, using the signal generator, a sinusoidal signal based, at least in part, on one or more noise characteristics of the transmit drive signal and capacitive sensing device, wherein generating the rectified sinusoidal signal comprises generating the rectified sinusoidal signal based on the sinusoidal signal; and
providing the rectified sinusoidal signal to the attenuator during the scan sequence.