Voltage regulation system for integrated circuit

摘要

An integrated circuit (IC) includes a power grid having first, through fourth nodes for receiving first supply, first ground, second supply, and second ground voltage signals, respectively, a voltage regulator, a reference voltage calibration circuit, a dual-rail sense circuit, and a voltage monitor circuit. The reference voltage calibration circuit receives the first supply, first ground, second supply, and second ground voltage signals and generates a reference voltage signal based on differences between voltage levels of the first supply and ground voltage signals, and the second supply and ground voltage signals. The voltage regulator regulates the first supply voltage signal based on the reference voltage signal and the second supply voltage signal. The dual-rail sense circuit generates a sense signal based on the second supply and ground voltage signals. The voltage monitor generates a voltage monitor signal based on the sense signal that indicates a state of the IC.

主权项

1. An integrated circuit, comprising:
a power grid having a plurality of supply and ground voltage lines, wherein a first supply voltage line of the plurality of supply voltage lines includes first and second nodes and a first set of electronic components connected therebetween, and a first ground voltage line of the plurality of ground voltage lines includes third and fourth nodes and a second set of electronic components connected therebetween, and wherein the first and third nodes receive first supply and ground voltage signals, respectively, and have a first electronic circuit module connected therebetween, and the second and fourth nodes receive second supply and ground voltage signals, respectively, and have a second electronic circuit module connected therebetween; a voltage regulator having a first input terminal connected to the second node for receiving the second supply voltage signal, a second input terminal for receiving a reference voltage signal, and an output terminal connected to the first node for providing the first supply voltage signal thereto; and a reference voltage calibration circuit, connected to the first and third nodes for receiving the first supply and ground voltage signals, respectively, the second and fourth nodes for receiving the second supply and ground voltage signals, respectively, and generating the reference voltage signal based on at least one of a difference between voltage levels of the first supply and ground voltage signals and a difference between voltage levels of the second supply and ground voltage signals.