CPC H03K 5/1534 (2013.01) [G04F 10/005 (2013.01); H03K 2005/00019 (2013.01); H03L 7/08 (2013.01)] | 19 Claims |
1. A delay measurement circuit for measuring delays between signal routes of an integrated circuit, the delay measurement circuit comprising:
a first skew circuit disposed proximate to a first bonding pad configured to receive a first clock signal having a first frequency;
a second skew circuit disposed proximate to a second bonding pad configured to receive a second clock signal having a second frequency, the second frequency being integrally related to the first frequency, the first skew circuit and the second skew circuit each having a first mode of operation as zero-delay-return path and a second mode of operation as a synchronized pass path;
a first pair of conductive traces coupled to the first skew circuit;
a second pair of conductive traces coupled to the second skew circuit;
a time-to-digital converter circuit; and
a switch circuit configured to selectively couple the time-to-digital converter circuit to the first skew circuit via the first pair of conductive traces and the second skew circuit via the second pair of conductive traces.
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