Semiconductor Components Industries, LLC

Sgs-thomson Microelectronics S.a.

Christian Perrin

Patrick Bernard

Pascal Debaty

Anthony Quelen

Pierre Daude

Lionel Federspiel

In one embodiment, a circuit is formed to couple a battery to a charging voltage at least a portion of a time when the charging voltage is greater than zero volts and is less than a first voltage value. The circuit is also formed to decouple the battery from the charging voltage approximately when the charging voltage is greater than the first voltage and also approximately when the charging voltage is no greater than zero volts.

Battery protection method and circuit therefor

An audio amplifier system ( ) is formed to include a voltage reference ( ). The voltage reference ( ) is formed to utilize a filter having a first cut-off frequency when the output ( ) of the voltage reference ( ) is less than a first value and to use a second cut-off frequency when the output ( ) is greater than the first value.

Method of forming an audio amplifier voltage reference and structure therefor

A differential amplifier filter with two channels in phase opposition, wherein each channel includes the same network of passive components which includes two impedances coupled in series between a first input terminal of the filter and a corresponding input of the differential amplifier, a feed-forward impedance coupled between a common node of the two series impedances and an output of the same channel of the differential amplifier, and a feedback impedance coupled between a second input of the differential amplifier and an output of the other channel of the differential amplifier.

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Saint Georges de Commiers, France

Christian Perrin