Patent ID: 7076401
Filing Date: 2006-07-11
Classification: G01R

Abstract:
1. A method comprising: receiving a signal at a destination node, the received signal being from an original signal transmitted from a source node; creating a positive unity time-voltage sawtooth ramp signal at the destination node, the amplitude of the positive unity time-voltage sawtooth ramp signal being a value in voltage proportional to a pulse width value of the original signal, the positive unity time-voltage sawtooth ramp signal starting just before a start of the received signal; inverting the positive unity time-voltage sawtooth ramp signal to generate a negative unity time-voltage sawtooth ramp signal; measuring a first skew time from the start of the positive unity time-voltage sawtooth ramp signal to a first threshold level on an edge of the received signal; measuring a second skew time from the start of the negative unity time-voltage sawtooth ramp signal to a second threshold level on the edge of the received signal; correlating the first skew time to a voltage level on the positive unity time-voltage sawtooth ramp; correlating the second skew time to a voltage level on the negative unity time-voltage sawtooth ramp; and converting the first and second skew times for each edge into pulses, a voltage level of each pulse being proportional to a corresponding one of the first and second skew times.