Hover sensor

A method of hover sensing, comprising:

• charging a first electrode subset of an electrode array substantially oppositely about a reference voltage to a second electrode subset of the electrode array, each electrode in the first electrode subset coupled to a corresponding electrode in the second electrode subset at a respective node and separated from the corresponding electrode by a gap substantially corresponding to at least a human hand size range;
• receiving, at each respective node, a net charge that is a sum of charges received from a corresponding pair of electrodes, the charges being stored on the corresponding pair of electrodes via a respective self-capacitance of each of the corresponding pair of electrodes;
• storing, for each respective node, the net charge on a capacitor;
• providing, for each respective node, an output voltage based on the net charge stored on the capacitor;
• and
• indicating a presence of a hover object responsive to identifying at least a threshold voltage change based on a sample of the output voltage.

A hover sensor, comprising:

• an electrode array including a first electrode subset and a second electrode subset, each electrode in the first electrode subset coupled to a corresponding electrode in the second electrode subset at a respective node;
• a charge circuit configured to charge the first electrode subset substantially oppositely about a reference voltage to the second electrode subset;
• an integration circuit configured to, for each respective node, store a net charge on a capacitor and provide an output voltage based on the net charge stored on the capacitor;
• a feedback circuit configured to select one or more operating parameters of the integration circuit to increase a dynamic range of the integration circuit;
• and
• a controller configured to indicate a presence of a hover object responsive to identifying at least a threshold voltage change based on a sample of the output voltage.