Two stage flash analog-to-digital signal converter

Details Two stage flash analog-to-digital signal converter Two stage flash analog-to-digital signal converter

1993-07-01

1995-05-30

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341159, H03M 114

Patent

active

054205875

ABSTRACT:
A two-stage flash analog-to-digital signal converter has a first stage voltage divider network and a set of amplifiers that perform an initial interpolation. The initial interpolation results are directly coupled, i.e. no resistive or capacitive elements, to a second stage comprising a set of comparators having multiple inputs. The multiple inputs of the second stage comparators are weightily coupled to the first stage amplifiers in a manner so as to cause the second stage comparators to generate a digital representation of the analog signal.

REFERENCES:
Kattman, et al, A Technique for Reducing Differential Non-linearity Errors in Flash A/D Converters, p. 170, IEEE International Solid-State Circuits Conference (1991).
Dingwall, et al, CMOS 1u, 8b, 50 MHz Averaging Flash A/DC, David Sarnoff Research Center.
Van De Grift, et al, An 8-Bit Video ADC Incorporating Folding and Interpolation Techniques pp. 944-953, IEEE Journal of Solid-State Circuits, vol. SC-22, No. 6, (Dec. 1987).

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