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Nonlinear Dual Integrating Ramp ADC

IP.com Disclosure Number: IPCOM000092274D
Original Publication Date: 1968-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Harrison, TJ: AUTHOR

Abstract

In a dual integrating ramp analog-to-digital converter ADC, an unknown voltage V(x) is integrated during an initial time interval T. At the end of the time interval, the output of the integrator is proportional to the time interval of the unknown voltage. This quantity is then reduced to zero by integrating an unknown reference voltage V(r) of opposite polarity. A logarithmic or other nonlinear representation of analog input data can be obtained by making the reference voltage V(r) an arbitrary function of time V(r) (t). (Image Omitted)

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Nonlinear Dual Integrating Ramp ADC

In a dual integrating ramp analog-to-digital converter ADC, an unknown voltage V(x) is integrated during an initial time interval T. At the end of the time interval, the output of the integrator is proportional to the time interval of the unknown voltage. This quantity is then reduced to zero by integrating an unknown reference voltage V(r) of opposite polarity. A logarithmic or other nonlinear representation of analog input data can be obtained by making the reference voltage V(r) an arbitrary function of time V(r) (t).

(Image Omitted)

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