×

Correction range technique for multi-range A/D converter

  • US 5,387,914 A
  • Filed: 02/22/1993
  • Issued: 02/07/1995
  • Est. Priority Date: 02/22/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. In a multi-stage A/D converter of the type where at least one stage comprises a flash converter producing two residue signals for the following stage;

  • that improvement for providing error correction capability by expanding the operating range of said following stage, comprising;

    a first flash stage having output means to produce said two residue signals which together represent a least significant bit (LSB) of said first flash stage;

    a second flash stage having an input receiving said residue signals;

    said second flash stage having a nominal operating range for processing normal error-free input signals;

    said second stage comprising a network responsive to said two residue signals and operable to produce corresponding threshold signals for a set of comparators to produce logic signals representing digitally the magnitude of the input signal defined by said two residue signals;

    said network comprising means to produce threshold signals outside of said nominal range of said second stage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×