Systems and methods for adaptive power multiplexing with a first type of power multiplexer and a second type of power multiplexer

A method comprising:

• sending an enable signal from a first power multiplexer of a first type to a second power multiplexer of a second type;
• switching a first load from a first power supply to a second power supply by the first power multiplexer and the second power multiplexer, the second power multiplexer switching the first load in response to the enable signal;
• and
• receiving the enable signal at the first power multiplexer.

A power distribution network (PDN) on a semiconductor chip, the PDN comprising:

• first means for multiplexing between a first power supply and a second power supply;
• and
• second means for multiplexing between the first power supply and the second power supply, wherein the second means is configured to receive an enable signal from the first means, the enable signal causing the second means to select between the first power supply, the second power supply, and power collapse;
• wherein the first means comprises a first type of power multiplexer, and wherein the second means comprises a second type of power multiplexer different from the first type of power multiplexer, further wherein the second means comprises a plurality of power multiplexers of the second type arranged in a loop to feedback the enable signal to the first means.

A semiconductor chip comprising:

• a first power multiplexer of a first type and a second power multiplexer of the first type, the first power multiplexer and the second power multiplexer being arranged in a daisy chain with a controller, the daisy chain passing a control signal from the controller to the first power multiplexer and on to the second power multiplexer and feeding back in the control signal to the controller;
• a third power multiplexer and a fourth power multiplexer, of a second type, arranged in a first loop from the first power multiplexer, the first loop passing a first enable signal from the first power multiplexer to the third power multiplexer and the fourth power multiplexer and back to the first power multiplexer;
• and
• a fifth power multiplexer and a sixth power multiplexer, of the second type, arranged in a second loop from the second power multiplexer, the second loop passing a second enable signal from the second power multiplexer to the fifth power multiplexer and the sixth power multiplexer and back to the second power multiplexer.