US 7,321,482 B2 | ||
Sub-circuit voltage manipulation | ||
Don Douglas Josephson, Fort Collins, Colo. (US); and Samuel D. Naffziger, Fort Collins, Colo. (US) | ||
Assigned to Hewlett-Packard Development Company, L.P., Houston, Tex. (US) | ||
Filed on Mar. 19, 2004, as Appl. No. 10/804,624. | ||
Prior Publication US 2005/0207076 A1, Sep. 22, 2005 | ||
Int. Cl. H02H 9/00 (2006.01); G01R 19/18 (2006.01); G01R 19/22 (2006.01) |
U.S. Cl. 361—56 [324/118] | 22 Claims |
1. An integrated circuit comprising:
a first sub-circuit coupled to a first power supply rail providing a first power supply voltage;
a second sub-circuit coupled to a second power supply rail providing a second power supply voltage;
a first power supply modulator, coupled to the first sub-circuit and comprising a first plurality of shunts coupled to the
first power supply rail, the modulator modulating the first power supply voltage without modulating the second power supply
voltage; and
a first shunt controller, coupled to the at least one first shunt, comprising means for activating a predetermined subset
of the first plurality of shunts.
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