Time-sharing current sense circuit for a multi-phase converter

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

Reexamination Certificate

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Reexamination Certificate

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06960905

ABSTRACT:
In a time-sharing current sense circuit for a multi-phase converter, a common transconductive amplifier is selectively connected to the channels of the converter power stage by a plurality of first switches under the control of a set of control clocks to detect the channel current of a selected channel among the channels so as to generate a sense current, and a sense current generated by the common transconductive amplifier from the sensed channel current is switched by a plurality of second switches under the control of the same control clocks to connect to one of a plurality of sampling-and-holding circuits each corresponding to one of the channels to generate a current sense signal to modulate the channel current of the selected channel.

REFERENCES:
patent: 6160388 (2000-12-01), Skelton et al.
patent: 6246220 (2001-06-01), Isham et al.
patent: 6424129 (2002-07-01), Lethellier
patent: 6433527 (2002-08-01), Izadinia et al.
patent: RE38487 (2004-04-01), Isham et al.
patent: 6747442 (2004-06-01), Olsen et al.
patent: 6803750 (2004-10-01), Zhang
patent: 6836103 (2004-12-01), Brooks et al.
patent: 6864644 (2005-03-01), Kernahan

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