Impedance detection circuit, method, and integrated circuit
US9774954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2015 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Feb 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This document discusses, among other things, an impedance detection circuit, method, and integrated circuit, comprising a ramp-up current generation circuit and an impedance determining circuit, wherein the ramp-up current generation circuit is configured to input a ramp-up current including n breaks to a port of a device where the ramp-up current generation circuit is disposed, to which port an external device is connected, and wherein the impedance determining circuit is configured to detect an impedance of the external device in each break time period of the ramp-up current input by the ramp-up current generation circuit until the impedance of the external device is acquired by detection in the last break time period of the n breaks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.