Card reader and method of use thereof
US8925817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated circuit that communicates with a host device via audio channels includes an interfacing circuit that receives and transmits analog signals on the audio channels. Such audio channels are designed for audio speakers and microphones and the interfacing circuit transmits digital data based on the received analog signals. The integrated circuit includes a processing device that is electrically coupled to the interfacing circuit. The processing device receives the digital data from the interfacing circuit and adjusts at least one parameter of the interfacing circuit based on the received digital data. The interfacing circuit receives the digital data from the processing device and transmits analog signals on at least one of the audio channels based on the at least one adjusted parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.