Power Supply Noise Reduction Circuit and Power Supply Noise Reduction Method

An integrated circuit comprising:

• a core voltage rail configured to provide an operating voltage to a sub-circuit of the integrated circuit;
• and
• a circuit component coupled between the core voltage rail and a ground rail, the circuit component being configured to:
• bleed off a portion of current on the core voltage rail based on a determination that a voltage on the core voltage rail meets or exceeds a high voltage threshold;
• and
• bleed off a smaller portion of the current on the core voltage rail based on a determination that the voltage on the core voltage rail is less than the high voltage threshold.

A method comprising:

• receiving a signal at an input node of an integrated circuit, the integrated circuit including termination circuitry configured to electrically couple the input node to a power rail of the integrated circuit;
• determining that a voltage on the power rail meets or exceeds a high voltage threshold;
• in response to the determining that the voltage meets or exceeds the high voltage threshold, bleeding off a portion of current on the power rail at a circuit component;
• determining that the voltage on the power rail is less than the high voltage threshold;
• and
• in response to the determining that the voltage is less than the high voltage threshold, bleeding off a smaller portion of the current on the power rail at the circuit component.