Rise time and fall time measurement

A time measurement system for determining a transition time of a circuit, comprising:

• a comparator comprising a transistor having:
• a gate coupled to a circuit, the circuit applying a circuit signal having a non-constant voltage to the gate;
• a first source/drain terminal coupled to a voltage source configured to apply one or more control voltages for evaluation of the circuit signal;
• and
• a second source/drain terminal operably coupled to a time converter component, wherein one or more output waveforms for transition time evaluation of the circuit are output from the second source/drain terminal to the time converter component, the one or more output waveforms based upon an evaluation of the circuit signal relative to the one or more control voltages;
• and
• a buffer having an input terminal coupled to the gate of the transistor at a common node and an output terminal coupled to the time converter component.

A method for reconstructing a transition waveform, comprising:

• receiving, from a circuit, a circuit signal concurrently applied to a buffer and a comparator;
• evaluating, at the comparator, the circuit signal based upon a first control voltage to create a first output waveform;
• evaluating, at the comparator, the circuit signal based upon a second control voltage to create a second output waveform;
• generating, at the buffer, a reference waveform based upon the circuit signal;
• and
• reconstructing a transition waveform based upon the first output waveform, the second output waveform, and the reference waveform.