Patent · US Active

Speaker impedance measurement

US9237406B2 · kind B2 · utility

1Cited by

2References

15Claims

0Family size

Assignee

ST-ERICSSON SA · CH

Inventors

Federico Guanziroli · Milano, IT
Sergio Pernici · Bergamo, IT
Robert Nilsson · Sebastian, US
Jan R. E. Thimansson · Broby, SE

Key dates

Filing date	Jul 7, 2011
Grant date	Jan 12, 2016
Priority date	—
Expiry date	Oct 30, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An integrated circuit for processing audio and voice signals in a telephone is disclosed. The integrated circuit comprises an audio output port having a first and a second output terminal for connection to a first and a second input terminal, respectively, of a speaker. The integrated circuit further comprises an audio input port having a first and a second input terminal for connection to a first and a second output terminal of an audio input source. The integrated circuit also comprises at least one audio output path and one audio input path. Moreover, the integrated circuit comprises a test impedance, such as a resistor, (RT) for measuring an electrical impedance of the speaker.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.