Voltage regulation system for integrated circuit

A voltage regulation system, 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 circuit 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 circuit components connected therebetween, and wherein the first and third nodes receive first supply and ground voltage signals, respectively, and the second and fourth nodes receive second supply and ground voltage signals, respectively;
• a feedback circuit for generating a feedback voltage signal, comprising;
• a bias-voltage generator for generating a bias-voltage signal;
• and
• a first amplifier having an inverting input terminal connected to the fourth node by way of a first resistor for receiving the second ground voltage signal, a non-inverting input terminal connected to the bias-voltage generator for receiving the bias-voltage signal, and an output terminal connected to the inverting input terminal thereof by way of a second resistor for generating the feedback voltage signal;
• a resistor-ladder circuit, connected between the second node and ground, having a voltage tap connected to the output terminal of the first amplifier by way of a third resistor for receiving the feedback voltage signal, wherein the resistor-ladder circuit generates a sense voltage signal;
• and
• a voltage regulator that receives an external third supply voltage signal, wherein the voltage regulator is connected to the voltage tap for receiving the sense voltage signal, and the first node for providing the first supply voltage signal thereto, and wherein the voltage regulator regulates the first supply voltage signal at a first voltage level.