G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 19/077 (2006.01) G11C 7/00 (2006.01)
Patent
CA 2176984
A contactless interface for transfer of data between a semiconductor music chip and a solid state audio player Data is transferred between the chip and audio player by way of a capacitive interface. The interface comprises a set of conductive plates or electrodes with outer dielectric surfaces on both the music chip and the audio player. Corresponding capacitive plates on the music chip and audio player facilitate data communication by forming a series of capacitors once the music chip is inserted within the audio player so that the capacitive plates of each device are aligned and in close proximity with one another. In accordance with one aspect of the invention a set of four capacitive plates is included on both the music chip and the audio player forming four capacitors. In this arrangement, two plates on each device are utilized to transmit data and two plates are utilized to receive data. The data is serially transferred between devices in a differential scheme utilizing differential receive and drive amplifiers. The differential data transfer minimizes transmission errors and makes the audio player less susceptible to noise. Contacts are also provided as part of the interface for transfer of power, ground and clock signals from the audio player to the music chip.
Grewe Anthony James
Shelby Kevin Alan
At&t Ipm Corp.
Grewe Anthony James
Kirby Eades Gale Baker
Shelby Kevin Alan
LandOfFree
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