Patent · US Active

Amplifier current consumption control

US9350314B2 · kind B2 · utility

0Cited by

1References

14Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Gerhard Pfaffinger · Regensburg, DE
Franz Lorenz · Bocholt, DE
Stefan Zuckmantel · Neufahrn, DE
Markus Christoph · Straubing, DE

Key dates

Filing date	Dec 21, 2011
Grant date	May 24, 2016
Priority date	—
Expiry date	Jan 27, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2200/165
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The audio amplifier includes a variable gain amplifier receiving the input audio signal and providing the output signal, whereby the output signal corresponds to the input signal amplified by a limiter gain. The audio amplifier further includes a limiter gain calculation unit, thus the input signal is amplified by the limiter gain. A control unit receives a signal representative of the input signal and is configured to estimate, based on a mathematical model, the input current or the total output current of the audio amplifier thus providing an estimated current signal corresponding to (and resulting from) the output signal, whereby the limiter gain calculation unit is configured to calculate, dependent on the estimation, the limiter gain such that the actual input current or the total output current of the audio amplifier does not exceed a threshold current value.

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