Detecting load current in multi-reference amplifiers

Details Detecting load current in multi-reference amplifiers Detecting load current in multi-reference amplifiers

2006-11-07

2006-11-07

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S298000

Reexamination Certificate

active

07132886

ABSTRACT:
A method and apparatus are disclosed for inferring amplifier load current from an internal control voltage governing a reference voltage in a multi-reference amplifier. Multi-reference amplifiers typically use internally-regulated references for application to the output stage. In that the output devices of these regulators exhibit limited gain or transconductance, internal voltage variances can be observed as a function of reference load current. This invention solves such problem at negligible additional cost.

REFERENCES:
patent: 6005316 (1999-12-01), Harris
patent: 6259317 (2001-07-01), Melanson
patent: 6535058 (2003-03-01), Kirn
patent: WO 00/28658 (2000-05-01), None

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