Ratio correction circuit and method for comparison of proportion

Details Ratio correction circuit and method for comparison of proportion Ratio correction circuit and method for comparison of proportion

1997-02-10

1999-08-03

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

323313, G05F 110, G05F 316

Patent

active

059330457

ABSTRACT:
A comparison system compares a voltage which is proportional to absolute temperature S.sub.p to one which is equal to the sum of a conventional, uncorrected, bandgap cell voltage VBG and a proportional to absolute temperature voltage CT. The addition of CT to the uncorrected bandgap signal value yields a signal of the form Sp/(VBG+CT), which exhibits improved linearity over a signal of the form Sp/VBG, where VBG includes a Tln(T) term.

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Donald G. Fink and Donald Christiansen, Editors, "Integrated Circuits and Microprocessors", Electronics Engineers' Handbook, Third Edition, 1989, pp. 8-48 through 8-50.
Alan B. Grebene, "Bias Circuits", Bipolar and MOS Analog Integrated Circuit Design, John Wiley & Sons, pp. 206-209.

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