Method and Apparatus for Regulating a Power Supply of an Integrated Circuit

An integrated circuit (IC) comprising:

• a PVT detector configured to generate an interface control signal based on at least one of process, voltage, and temperature of the IC;
• an interface circuit configured to produce a voltage control signal based on the interface control signal;
• and
• a power supply circuit configured to produce a positive power supply voltage for the IC based on the voltage control signal,
• wherein the interface circuit is configured to produce the voltage control signal by adjusting a resistance as a function of the interface control signal.

A method of controlling a positive supply voltage of an integrated circuit (IC), the method comprising:

• a PVT detector generating an interface control signal based on at least one of process, voltage, and temperature of the IC;
• an interface circuit producing a voltage control signal based on the interface control signal;
• and
• a power supply circuit located on the IC producing the positive supply voltage for the IC based on the voltage control signal, wherein:
• producing the voltage control signal comprises adjusting the resistance of the interface circuit, and
• wherein at least one of:
• (a) the resistance is an input resistance of a terminal of the IC;
• (b) adjusting the resistance of the interface circuit comprises connecting at least one resistor to a first predetermined voltage in response to the interface control signal;
• (c) adjusting the resistance of the interface circuit comprises controlling a resistance of at least one active element operating in a triode region, in response to the interface control signal;
• and
• (d) said interface circuit comprises a plurality of switches, and the interface control signal from the PVT detector controls said switches.