A high speed and area efficient on-chip analog waveform extractor

  • Authors:
  • Ara Hajjar;Gordon W. Roberts

  • Affiliations:
  • -;-

  • Venue:
  • ITC '98 Proceedings of the 1998 IEEE International Test Conference
  • Year:
  • 1998

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Abstract

A multiple pass A/D conversion techniqueis proposed for mixed-signal test applications.Only a single on-chip comparator and sample-and-holdcircuit is required to digitize repetitive analog wave-forms.Simulations show 10 bits of amplitude resolutionat 300 MHz for a bipolar comparator design (0.8 mmBiCMOS process), and 10 bits of amplitude resolution at667 MHz for a CMOS comparator design (0.5 mmCMOS process). A prototype IC designed for a 0.5 mmCMOS process has been sent for fabrication. Experimentalresults from a prototype board (implementedwith discrete components) are given.