Implementing integral dynamic voltage sensing and trigger

A circuit for implementing dynamic voltage sensing and including a trigger circuit, said circuit comprising:

• a first quiet oscillator generating a reference clock,
• a second noisy oscillator generating a noisy clock;
• a digital control loop matching a frequency of said first quiet oscillator and said second noisy oscillator;
• a first predefined-bit shift register being driven by the reference clock;
• a second predefined-bit shift register being driven by the noisy clock, said second predefined-bit being greater than the first predefined-bit;
• said second predefined-bit shift register being evaluated responsive to an overflow of said first predefined-bit shift register;
• and
• said trigger circuit comparing contents of said second predefined-bit shift register with a noise threshold select value to identify a noise event and generate a noise detector control output.

A design structure embodied in a machine readable medium used in a design process, the design structure comprising:

• a circuit tangibly embodied in the machine readable medium used in the design process, said circuit for implementing dynamic voltage sensing and including a trigger circuit, said circuit comprising:
• a first quiet oscillator generating a reference clock,
• a second noisy oscillator generating a noisy clock;
• a digital control loop matching a frequency of said first quiet oscillator and said second noisy oscillator;
• a first predefined-bit shift register being driven by the reference clock;
• a second predefined-bit shift register being driven by the noisy clock, said second predefined-bit being greater than the first predefined-bit;
• said second predefined-bit shift register being evaluated responsive to an overflow of said first predefined-bit shift register;
• and
• said trigger circuit comparing contents of said second predefined-bit shift register with a noise threshold select value to identify a noise event and generate a noise detector control output, wherein the design structure, when read and used in the manufacture of a semiconductor chip produces a chip comprising said circuit.