Invention Grant
- Patent Title: Single-chip multi-stimulus sensor controller
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Application No.: US12283423Application Date: 2008-09-10
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Publication No.: US08592697B2Publication Date: 2013-11-26
- Inventor: Steve Porter Hotelling , Christoph Horst Krah , Marduke Yousefpor , Thomas James Wilson
- Applicant: Steve Porter Hotelling , Christoph Horst Krah , Marduke Yousefpor , Thomas James Wilson
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Morrison & Foerster LLP
- Main IPC: G06F3/044
- IPC: G06F3/044

Abstract:
A multi-stimulus controller for a multi-touch sensor is formed on a single integrated circuit (single-chip). The multi-stimulus controller includes a transmit oscillator, a transmit signal section that generates a plurality of drive signals based on a frequency of the transmit oscillator, a plurality of transmit channels that transmit the drive signals simultaneously to drive the multi-touch sensor, a receive channel that receives a sense signal resulting from the driving of the multi-touch sensor, a receive oscillator, and a demodulation section that demodulates the received sense signal based on a frequency of the receive oscillator to obtain sensing results, the demodulation section including a demodulator and a vector operator.
Public/Granted literature
- US20100059295A1 Single-chip multi-stimulus sensor controller Public/Granted day:2010-03-11
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