| 摘要 |
A method for measuring a mutual capacitance between electrodes of a touch sensitive device includes generating a periodic pulse, communicating the pulse to a drive electrode, and measuring a mutual capacitance between the drive electrode and a sense electrode at a point of intersection between the drive electrode and the sense electrode. Measuring further includes continuously integrating a sense signal from the sense electrode to thereby generate an integrated sense signal, periodically sampling the integrated sense signal at a first time that is prior to a falling edge of the pulse, and at a second time that is prior to a rising edge of the pulse to thereby sample a maximum value and a minimum value of the integrated sense signal, digitizing the maximum value and the minimum value, and determining a difference between the maximum value and the minimum value to thereby determine a mutual capacitance between the drive electrode and the sense electrode. |
